mirror of https://github.com/LemmyNet/lemmy
Beginning to add new comment_view.
Dessalines
4 years ago
parent
79a960d8a5
commit
e4714627a4
@ -0,0 +1,23 @@
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use crate::schema::comment_aggregates;
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use diesel::{result::Error, *};
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use serde::Serialize;
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#[derive(Queryable, Associations, Identifiable, PartialEq, Debug, Serialize, Clone)]
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#[table_name = "comment_aggregates"]
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pub struct CommentAggregates {
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pub id: i32,
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pub comment_id: i32,
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pub score: i64,
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pub upvotes: i64,
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pub downvotes: i64,
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}
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impl CommentAggregates {
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pub fn read(conn: &PgConnection, comment_id: i32) -> Result<Self, Error> {
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comment_aggregates::table
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.filter(comment_aggregates::comment_id.eq(comment_id))
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.first::<Self>(conn)
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}
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}
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// TODO add tests here
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@ -0,0 +1,662 @@
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use crate::{
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aggregates::comment_aggregates::CommentAggregates,
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functions::hot_rank,
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fuzzy_search,
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limit_and_offset,
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schema::{
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comment,
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comment_aggregates,
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comment_alias_1,
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comment_like,
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comment_saved,
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community,
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community_follower,
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community_user_ban,
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post,
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user_,
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user_alias_1,
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},
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source::{
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comment::{Comment, CommentAlias1, CommentSaved},
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community::{Community, CommunityFollower, CommunitySafe, CommunityUserBan},
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post::Post,
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user::{UserAlias1, UserSafe, UserSafeAlias1, User_},
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},
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views::ViewToVec,
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ListingType,
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MaybeOptional,
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SortType,
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ToSafe,
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};
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use diesel::{result::Error, *};
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use serde::Serialize;
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#[derive(Debug, PartialEq, Serialize, Clone)]
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pub struct CommentView {
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pub comment: Comment,
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pub creator: UserSafe,
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pub recipient: Option<UserSafeAlias1>, // Left joins to comment and user
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pub post: Post,
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pub community: CommunitySafe,
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pub counts: CommentAggregates,
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pub creator_banned_from_community: bool, // Left Join to CommunityUserBan
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pub subscribed: bool, // Left join to CommunityFollower
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pub saved: bool, // Left join to CommentSaved
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pub my_vote: Option<i16>, // Left join to CommentLike
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}
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type CommentViewTuple = (
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Comment,
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UserSafe,
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Option<CommentAlias1>,
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Option<UserSafeAlias1>,
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Post,
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CommunitySafe,
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CommentAggregates,
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Option<CommunityUserBan>,
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Option<CommunityFollower>,
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Option<CommentSaved>,
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Option<i16>,
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);
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impl CommentView {
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pub fn read(
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conn: &PgConnection,
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comment_id: i32,
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my_user_id: Option<i32>,
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) -> Result<Self, Error> {
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// The left join below will return None in this case
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let user_id_join = my_user_id.unwrap_or(-1);
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let (
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comment,
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creator,
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_parent_comment,
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recipient,
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post,
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community,
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counts,
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creator_banned_from_community,
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subscribed,
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saved,
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my_vote,
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) = comment::table
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.find(comment_id)
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.inner_join(user_::table)
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// recipient here
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.left_join(comment_alias_1::table.on(comment_alias_1::id.nullable().eq(comment::parent_id)))
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.left_join(user_alias_1::table.on(user_alias_1::id.eq(comment_alias_1::creator_id)))
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.inner_join(post::table)
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.inner_join(community::table.on(post::community_id.eq(community::id)))
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.inner_join(comment_aggregates::table)
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.left_join(
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community_user_ban::table.on(
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community::id
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.eq(community_user_ban::community_id)
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.and(community_user_ban::user_id.eq(comment::creator_id)),
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),
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)
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.left_join(
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community_follower::table.on(
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post::community_id
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.eq(community_follower::community_id)
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.and(community_follower::user_id.eq(user_id_join)),
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),
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)
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.left_join(
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comment_saved::table.on(
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comment::id
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.eq(comment_saved::comment_id)
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.and(comment_saved::user_id.eq(user_id_join)),
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),
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)
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.left_join(
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comment_like::table.on(
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comment::id
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.eq(comment_like::comment_id)
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.and(comment_like::user_id.eq(user_id_join)),
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),
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)
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.select((
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comment::all_columns,
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User_::safe_columns_tuple(),
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comment_alias_1::all_columns.nullable(),
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UserAlias1::safe_columns_tuple().nullable(),
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post::all_columns,
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Community::safe_columns_tuple(),
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comment_aggregates::all_columns,
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community_user_ban::all_columns.nullable(),
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community_follower::all_columns.nullable(),
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comment_saved::all_columns.nullable(),
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comment_like::score.nullable(),
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))
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.first::<CommentViewTuple>(conn)?;
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Ok(CommentView {
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comment,
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recipient,
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post,
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creator,
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community,
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counts,
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creator_banned_from_community: creator_banned_from_community.is_some(),
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subscribed: subscribed.is_some(),
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saved: saved.is_some(),
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my_vote,
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})
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}
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}
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mod join_types {
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use crate::schema::{
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comment,
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comment_aggregates,
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comment_alias_1,
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comment_like,
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comment_saved,
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community,
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community_follower,
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community_user_ban,
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post,
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user_,
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user_alias_1,
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};
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use diesel::{
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pg::Pg,
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query_builder::BoxedSelectStatement,
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query_source::joins::{Inner, Join, JoinOn, LeftOuter},
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sql_types::*,
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};
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// /// TODO awful, but necessary because of the boxed join
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pub(super) type BoxedCommentJoin<'a> = BoxedSelectStatement<
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'a,
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(
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(
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Integer,
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Integer,
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Integer,
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Nullable<Integer>,
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Text,
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Bool,
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Bool,
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Timestamp,
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Nullable<Timestamp>,
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Bool,
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Text,
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Bool,
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),
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(
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Integer,
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Text,
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Nullable<Text>,
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Nullable<Text>,
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Bool,
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Bool,
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Timestamp,
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Nullable<Timestamp>,
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Nullable<Text>,
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Text,
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Nullable<Text>,
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Bool,
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Nullable<Text>,
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Bool,
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),
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Nullable<(
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Integer,
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Integer,
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Integer,
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Nullable<Integer>,
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Text,
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Bool,
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Bool,
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Timestamp,
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Nullable<Timestamp>,
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Bool,
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Text,
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Bool,
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)>,
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Nullable<(
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Integer,
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Text,
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Nullable<Text>,
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Nullable<Text>,
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Bool,
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Bool,
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Timestamp,
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Nullable<Timestamp>,
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Nullable<Text>,
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Text,
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Nullable<Text>,
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Bool,
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Nullable<Text>,
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Bool,
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)>,
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(
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Integer,
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Text,
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Nullable<Text>,
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Nullable<Text>,
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Integer,
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Integer,
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Bool,
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Bool,
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Timestamp,
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Nullable<Timestamp>,
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Bool,
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Bool,
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Bool,
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Nullable<Text>,
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Nullable<Text>,
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Nullable<Text>,
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Nullable<Text>,
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Text,
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Bool,
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),
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(
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Integer,
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Text,
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Text,
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Nullable<Text>,
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Integer,
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Integer,
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Bool,
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Timestamp,
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Nullable<Timestamp>,
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Bool,
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Bool,
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Text,
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Bool,
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Nullable<Text>,
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Nullable<Text>,
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),
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(Integer, Integer, BigInt, BigInt, BigInt),
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Nullable<(Integer, Integer, Integer, Timestamp)>,
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Nullable<(Integer, Integer, Integer, Timestamp, Nullable<Bool>)>,
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Nullable<(Integer, Integer, Integer, Timestamp)>,
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Nullable<SmallInt>,
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),
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JoinOn<
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Join<
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JoinOn<
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Join<
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JoinOn<
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Join<
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JoinOn<
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Join<
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JoinOn<
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Join<
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JoinOn<
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Join<
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JoinOn<
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Join<
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JoinOn<
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Join<
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JoinOn<
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Join<
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JoinOn<
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Join<comment::table, user_::table, Inner>,
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diesel::expression::operators::Eq<
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diesel::expression::nullable::Nullable<
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comment::columns::creator_id,
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>,
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diesel::expression::nullable::Nullable<
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user_::columns::id,
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>,
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>,
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>,
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comment_alias_1::table,
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LeftOuter,
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>,
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diesel::expression::operators::Eq<
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diesel::expression::nullable::Nullable<
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comment_alias_1::columns::id,
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>,
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comment::columns::parent_id,
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>,
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>,
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user_alias_1::table,
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LeftOuter,
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>,
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diesel::expression::operators::Eq<
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user_alias_1::columns::id,
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comment_alias_1::columns::creator_id,
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>,
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>,
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post::table,
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Inner,
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>,
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diesel::expression::operators::Eq<
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diesel::expression::nullable::Nullable<comment::columns::post_id>,
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diesel::expression::nullable::Nullable<post::columns::id>,
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>,
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>,
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community::table,
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Inner,
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>,
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diesel::expression::operators::Eq<
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post::columns::community_id,
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community::columns::id,
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>,
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>,
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comment_aggregates::table,
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Inner,
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>,
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diesel::expression::operators::Eq<
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diesel::expression::nullable::Nullable<
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comment_aggregates::columns::comment_id,
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>,
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diesel::expression::nullable::Nullable<comment::columns::id>,
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>,
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>,
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community_user_ban::table,
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LeftOuter,
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>,
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diesel::expression::operators::And<
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diesel::expression::operators::Eq<
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community::columns::id,
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community_user_ban::columns::community_id,
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>,
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diesel::expression::operators::Eq<
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community_user_ban::columns::user_id,
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comment::columns::creator_id,
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>,
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>,
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>,
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community_follower::table,
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LeftOuter,
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>,
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diesel::expression::operators::And<
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diesel::expression::operators::Eq<
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post::columns::community_id,
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community_follower::columns::community_id,
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>,
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diesel::expression::operators::Eq<
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community_follower::columns::user_id,
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diesel::expression::bound::Bound<Integer, i32>,
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>,
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>,
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>,
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comment_saved::table,
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LeftOuter,
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>,
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diesel::expression::operators::And<
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diesel::expression::operators::Eq<
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comment::columns::id,
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comment_saved::columns::comment_id,
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>,
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diesel::expression::operators::Eq<
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comment_saved::columns::user_id,
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diesel::expression::bound::Bound<Integer, i32>,
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>,
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>,
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>,
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comment_like::table,
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LeftOuter,
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>,
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diesel::expression::operators::And<
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diesel::expression::operators::Eq<comment::columns::id, comment_like::columns::comment_id>,
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diesel::expression::operators::Eq<
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comment_like::columns::user_id,
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diesel::expression::bound::Bound<Integer, i32>,
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>,
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>,
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>,
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Pg,
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>;
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}
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pub struct CommentQueryBuilder<'a> {
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conn: &'a PgConnection,
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query: join_types::BoxedCommentJoin<'a>,
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listing_type: ListingType,
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sort: &'a SortType,
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for_community_id: Option<i32>,
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for_community_name: Option<String>,
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for_post_id: Option<i32>,
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for_creator_id: Option<i32>,
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for_recipient_id: Option<i32>,
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search_term: Option<String>,
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saved_only: bool,
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unread_only: bool,
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page: Option<i64>,
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limit: Option<i64>,
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}
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impl<'a> CommentQueryBuilder<'a> {
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pub fn create(conn: &'a PgConnection, my_user_id: Option<i32>) -> Self {
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// The left join below will return None in this case
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let user_id_join = my_user_id.unwrap_or(-1);
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let query = comment::table
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.inner_join(user_::table)
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// recipient here
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.left_join(comment_alias_1::table.on(comment_alias_1::id.nullable().eq(comment::parent_id)))
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.left_join(user_alias_1::table.on(user_alias_1::id.eq(comment_alias_1::creator_id)))
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.inner_join(post::table)
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.inner_join(community::table.on(post::community_id.eq(community::id)))
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.inner_join(comment_aggregates::table)
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.left_join(
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community_user_ban::table.on(
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community::id
|
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.eq(community_user_ban::community_id)
|
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.and(community_user_ban::user_id.eq(comment::creator_id)),
|
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),
|
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)
|
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.left_join(
|
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community_follower::table.on(
|
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post::community_id
|
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.eq(community_follower::community_id)
|
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.and(community_follower::user_id.eq(user_id_join)),
|
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),
|
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)
|
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.left_join(
|
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comment_saved::table.on(
|
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comment::id
|
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.eq(comment_saved::comment_id)
|
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.and(comment_saved::user_id.eq(user_id_join)),
|
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),
|
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)
|
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.left_join(
|
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comment_like::table.on(
|
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comment::id
|
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.eq(comment_like::comment_id)
|
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.and(comment_like::user_id.eq(user_id_join)),
|
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),
|
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)
|
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.select((
|
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comment::all_columns,
|
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User_::safe_columns_tuple(),
|
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comment_alias_1::all_columns.nullable(),
|
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UserAlias1::safe_columns_tuple().nullable(),
|
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post::all_columns,
|
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Community::safe_columns_tuple(),
|
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comment_aggregates::all_columns,
|
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community_user_ban::all_columns.nullable(),
|
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community_follower::all_columns.nullable(),
|
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comment_saved::all_columns.nullable(),
|
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comment_like::score.nullable(),
|
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))
|
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.into_boxed();
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|
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CommentQueryBuilder {
|
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conn,
|
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query,
|
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listing_type: ListingType::All,
|
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sort: &SortType::New,
|
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for_community_id: None,
|
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for_community_name: None,
|
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for_post_id: None,
|
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for_creator_id: None,
|
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for_recipient_id: None,
|
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search_term: None,
|
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saved_only: false,
|
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unread_only: false,
|
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page: None,
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limit: None,
|
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}
|
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}
|
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|
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pub fn listing_type(mut self, listing_type: ListingType) -> Self {
|
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self.listing_type = listing_type;
|
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self
|
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}
|
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|
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pub fn sort(mut self, sort: &'a SortType) -> Self {
|
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self.sort = sort;
|
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self
|
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}
|
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|
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pub fn for_post_id<T: MaybeOptional<i32>>(mut self, for_post_id: T) -> Self {
|
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self.for_post_id = for_post_id.get_optional();
|
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self
|
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}
|
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|
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pub fn for_creator_id<T: MaybeOptional<i32>>(mut self, for_creator_id: T) -> Self {
|
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self.for_creator_id = for_creator_id.get_optional();
|
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self
|
||||
}
|
||||
|
||||
pub fn for_recipient_id<T: MaybeOptional<i32>>(mut self, for_recipient_id: T) -> Self {
|
||||
self.for_creator_id = for_recipient_id.get_optional();
|
||||
self
|
||||
}
|
||||
|
||||
pub fn for_community_id<T: MaybeOptional<i32>>(mut self, for_community_id: T) -> Self {
|
||||
self.for_community_id = for_community_id.get_optional();
|
||||
self
|
||||
}
|
||||
|
||||
pub fn for_community_name<T: MaybeOptional<String>>(mut self, for_community_name: T) -> Self {
|
||||
self.for_community_name = for_community_name.get_optional();
|
||||
self
|
||||
}
|
||||
|
||||
pub fn search_term<T: MaybeOptional<String>>(mut self, search_term: T) -> Self {
|
||||
self.search_term = search_term.get_optional();
|
||||
self
|
||||
}
|
||||
|
||||
pub fn saved_only(mut self, saved_only: bool) -> Self {
|
||||
self.saved_only = saved_only;
|
||||
self
|
||||
}
|
||||
|
||||
pub fn unread_only(mut self, unread_only: bool) -> Self {
|
||||
self.unread_only = unread_only;
|
||||
self
|
||||
}
|
||||
|
||||
pub fn page<T: MaybeOptional<i64>>(mut self, page: T) -> Self {
|
||||
self.page = page.get_optional();
|
||||
self
|
||||
}
|
||||
|
||||
pub fn limit<T: MaybeOptional<i64>>(mut self, limit: T) -> Self {
|
||||
self.limit = limit.get_optional();
|
||||
self
|
||||
}
|
||||
|
||||
pub fn list(self) -> Result<Vec<CommentView>, Error> {
|
||||
use diesel::dsl::*;
|
||||
|
||||
let mut query = self.query;
|
||||
|
||||
// The replies
|
||||
if let Some(for_recipient_id) = self.for_recipient_id {
|
||||
query = query
|
||||
// TODO needs lots of testing
|
||||
.filter(user_alias_1::id.eq(for_recipient_id))
|
||||
.filter(comment::deleted.eq(false))
|
||||
.filter(comment::removed.eq(false));
|
||||
}
|
||||
|
||||
if self.unread_only {
|
||||
query = query.filter(comment::read.eq(false));
|
||||
}
|
||||
|
||||
if let Some(for_creator_id) = self.for_creator_id {
|
||||
query = query.filter(comment::creator_id.eq(for_creator_id));
|
||||
};
|
||||
|
||||
if let Some(for_community_id) = self.for_community_id {
|
||||
query = query.filter(post::community_id.eq(for_community_id));
|
||||
}
|
||||
|
||||
if let Some(for_community_name) = self.for_community_name {
|
||||
query = query
|
||||
.filter(community::name.eq(for_community_name))
|
||||
.filter(comment::local.eq(true));
|
||||
}
|
||||
|
||||
if let Some(for_post_id) = self.for_post_id {
|
||||
query = query.filter(comment::post_id.eq(for_post_id));
|
||||
};
|
||||
|
||||
if let Some(search_term) = self.search_term {
|
||||
query = query.filter(comment::content.ilike(fuzzy_search(&search_term)));
|
||||
};
|
||||
|
||||
query = match self.listing_type {
|
||||
// ListingType::Subscribed => query.filter(community_follower::subscribed.eq(true)),
|
||||
ListingType::Subscribed => query.filter(community_follower::user_id.is_not_null()), // TODO could be this: and(community_follower::user_id.eq(user_id_join)),
|
||||
ListingType::Local => query.filter(community::local.eq(true)),
|
||||
_ => query,
|
||||
};
|
||||
|
||||
if self.saved_only {
|
||||
query = query.filter(comment_saved::id.is_not_null());
|
||||
}
|
||||
|
||||
query = match self.sort {
|
||||
SortType::Hot | SortType::Active => query
|
||||
.order_by(hot_rank(comment_aggregates::score, comment::published).desc())
|
||||
.then_order_by(comment::published.desc()),
|
||||
SortType::New => query.order_by(comment::published.desc()),
|
||||
SortType::TopAll => query.order_by(comment_aggregates::score.desc()),
|
||||
SortType::TopYear => query
|
||||
.filter(comment::published.gt(now - 1.years()))
|
||||
.order_by(comment_aggregates::score.desc()),
|
||||
SortType::TopMonth => query
|
||||
.filter(comment::published.gt(now - 1.months()))
|
||||
.order_by(comment_aggregates::score.desc()),
|
||||
SortType::TopWeek => query
|
||||
.filter(comment::published.gt(now - 1.weeks()))
|
||||
.order_by(comment_aggregates::score.desc()),
|
||||
SortType::TopDay => query
|
||||
.filter(comment::published.gt(now - 1.days()))
|
||||
.order_by(comment_aggregates::score.desc()),
|
||||
};
|
||||
|
||||
let (limit, offset) = limit_and_offset(self.page, self.limit);
|
||||
|
||||
// Note: deleted and removed comments are done on the front side
|
||||
let res = query
|
||||
.limit(limit)
|
||||
.offset(offset)
|
||||
.load::<CommentViewTuple>(self.conn)?;
|
||||
|
||||
Ok(CommentView::to_vec(res))
|
||||
}
|
||||
}
|
||||
|
||||
impl ViewToVec for CommentView {
|
||||
type DbTuple = CommentViewTuple;
|
||||
fn to_vec(posts: Vec<Self::DbTuple>) -> Vec<Self> {
|
||||
posts
|
||||
.iter()
|
||||
.map(|a| Self {
|
||||
comment: a.0.to_owned(),
|
||||
creator: a.1.to_owned(),
|
||||
recipient: a.3.to_owned(),
|
||||
post: a.4.to_owned(),
|
||||
community: a.5.to_owned(),
|
||||
counts: a.6.to_owned(),
|
||||
creator_banned_from_community: a.7.is_some(),
|
||||
subscribed: a.8.is_some(),
|
||||
saved: a.9.is_some(),
|
||||
my_vote: a.10,
|
||||
})
|
||||
.collect::<Vec<Self>>()
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,7 @@
|
||||
-- comment aggregates
|
||||
drop table comment_aggregates;
|
||||
drop trigger comment_aggregates_comment on comment;
|
||||
drop trigger comment_aggregates_score on comment_like;
|
||||
drop function
|
||||
comment_aggregates_comment,
|
||||
comment_aggregates_score;
|
||||
@ -0,0 +1,82 @@
|
||||
-- Add comment aggregates
|
||||
create table comment_aggregates (
|
||||
id serial primary key,
|
||||
comment_id int references comment on update cascade on delete cascade not null,
|
||||
score bigint not null default 0,
|
||||
upvotes bigint not null default 0,
|
||||
downvotes bigint not null default 0,
|
||||
unique (comment_id)
|
||||
);
|
||||
|
||||
insert into comment_aggregates (comment_id, score, upvotes, downvotes)
|
||||
select
|
||||
c.id,
|
||||
COALESCE(cl.total, 0::bigint) AS score,
|
||||
COALESCE(cl.up, 0::bigint) AS upvotes,
|
||||
COALESCE(cl.down, 0::bigint) AS downvotes
|
||||
from comment c
|
||||
left join ( select l.comment_id as id,
|
||||
sum(l.score) as total,
|
||||
count(
|
||||
case
|
||||
when l.score = 1 then 1
|
||||
else null::integer
|
||||
end) as up,
|
||||
count(
|
||||
case
|
||||
when l.score = '-1'::integer then 1
|
||||
else null::integer
|
||||
end) as down
|
||||
from comment_like l
|
||||
group by l.comment_id) cl on cl.id = c.id;
|
||||
|
||||
-- Add comment aggregate triggers
|
||||
|
||||
-- initial comment add
|
||||
create function comment_aggregates_comment()
|
||||
returns trigger language plpgsql
|
||||
as $$
|
||||
begin
|
||||
IF (TG_OP = 'INSERT') THEN
|
||||
insert into comment_aggregates (comment_id) values (NEW.id);
|
||||
ELSIF (TG_OP = 'DELETE') THEN
|
||||
delete from comment_aggregates where comment_id = OLD.id;
|
||||
END IF;
|
||||
return null;
|
||||
end $$;
|
||||
|
||||
create trigger comment_aggregates_comment
|
||||
after insert or delete on comment
|
||||
for each row
|
||||
execute procedure comment_aggregates_comment();
|
||||
|
||||
-- comment score
|
||||
create function comment_aggregates_score()
|
||||
returns trigger language plpgsql
|
||||
as $$
|
||||
begin
|
||||
IF (TG_OP = 'INSERT') THEN
|
||||
update comment_aggregates ca
|
||||
set score = score + NEW.score,
|
||||
upvotes = case when NEW.score = 1 then upvotes + 1 else upvotes end,
|
||||
downvotes = case when NEW.score = -1 then downvotes + 1 else downvotes end
|
||||
where ca.comment_id = NEW.comment_id;
|
||||
|
||||
ELSIF (TG_OP = 'DELETE') THEN
|
||||
-- Join to comment because that comment may not exist anymore
|
||||
update comment_aggregates ca
|
||||
set score = score - OLD.score,
|
||||
upvotes = case when OLD.score = 1 then upvotes - 1 else upvotes end,
|
||||
downvotes = case when OLD.score = -1 then downvotes - 1 else downvotes end
|
||||
from comment c
|
||||
where ca.comment_id = c.id
|
||||
and ca.comment_id = OLD.comment_id;
|
||||
|
||||
END IF;
|
||||
return null;
|
||||
end $$;
|
||||
|
||||
create trigger comment_aggregates_score
|
||||
after insert or delete on comment_like
|
||||
for each row
|
||||
execute procedure comment_aggregates_score();
|
||||
Loading…
Reference in New Issue