Add constraints tab (#41)

* get constraints

* replace / with .

* add constraint tab

* return TableRow

* remove comment column

* fix clippy warnings

src/app.rs

@@ -24,7 +24,8 @@ pub enum Focus {
 }
 pub struct App {
     record_table: RecordTableComponent,
-    structure_table: TableComponent,
+    column_table: TableComponent,
+    constraint_table: TableComponent,
     focus: Focus,
     tab: TabComponent,
     help: HelpComponent,
@@ -42,7 +43,8 @@ impl App {
             config: config.clone(),
             connections: ConnectionsComponent::new(config.key_config.clone(), config.conn),
             record_table: RecordTableComponent::new(config.key_config.clone()),
-            structure_table: TableComponent::new(config.key_config.clone()),
+            column_table: TableComponent::new(config.key_config.clone()),
+            constraint_table: TableComponent::new(config.key_config.clone()),
             tab: TabComponent::new(config.key_config.clone()),
             help: HelpComponent::new(config.key_config.clone()),
             databases: DatabasesComponent::new(config.key_config.clone()),
@@ -93,10 +95,15 @@ impl App {
                 self.record_table
                     .draw(f, right_chunks[1], matches!(self.focus, Focus::Table))?
             }
-            Tab::Structure => {
-                self.structure_table
+            Tab::Columns => {
+                self.column_table
                     .draw(f, right_chunks[1], matches!(self.focus, Focus::Table))?
             }
+            Tab::Constraints => self.constraint_table.draw(
+                f,
+                right_chunks[1],
+                matches!(self.focus, Focus::Table),
+            )?,
         }
         self.error.draw(f, Rect::default(), false)?;
         self.help.draw(f, Rect::default(), false)?;
@@ -162,6 +169,7 @@ impl App {
     async fn update_table(&mut self) -> anyhow::Result<()> {
         if let Some((database, table)) = self.databases.tree().selected_table() {
             self.focus = Focus::Table;
+            self.record_table.reset();
             let (headers, records) = self
                 .pool
                 .as_ref()
@@ -171,14 +179,42 @@ impl App {
             self.record_table
                 .update(records, headers, database.clone(), table.clone());
 
-            let (headers, records) = self
+            self.column_table.reset();
+            let columns = self
                 .pool
                 .as_ref()
                 .unwrap()
                 .get_columns(&database, &table)
                 .await?;
-            self.structure_table
-                .update(records, headers, database.clone(), table.clone());
+            if !columns.is_empty() {
+                self.column_table.update(
+                    columns
+                        .iter()
+                        .map(|c| c.columns())
+                        .collect::<Vec<Vec<String>>>(),
+                    columns.get(0).unwrap().fields(),
+                    database.clone(),
+                    table.clone(),
+                );
+            }
+            self.constraint_table.reset();
+            let constraints = self
+                .pool
+                .as_ref()
+                .unwrap()
+                .get_constraints(&database, &table)
+                .await?;
+            if !constraints.is_empty() {
+                self.constraint_table.update(
+                    constraints
+                        .iter()
+                        .map(|c| c.columns())
+                        .collect::<Vec<Vec<String>>>(),
+                    constraints.get(0).unwrap().fields(),
+                    database.clone(),
+                    table.clone(),
+                );
+            }
             self.table_status
                 .update(self.record_table.len() as u64, table);
         }
@@ -303,13 +339,24 @@ impl App {
                             }
                         };
                     }
-                    Tab::Structure => {
-                        if self.structure_table.event(key)?.is_consumed() {
+                    Tab::Columns => {
+                        if self.column_table.event(key)?.is_consumed() {
+                            return Ok(EventState::Consumed);
+                        };
+
+                        if key == self.config.key_config.copy {
+                            if let Some(text) = self.column_table.selected_cells() {
+                                copy_to_clipboard(text.as_str())?
+                            }
+                        };
+                    }
+                    Tab::Constraints => {
+                        if self.constraint_table.event(key)?.is_consumed() {
                             return Ok(EventState::Consumed);
                         };
 
                         if key == self.config.key_config.copy {
-                            if let Some(text) = self.structure_table.selected_cells() {
+                            if let Some(text) = self.column_table.selected_cells() {
                                 copy_to_clipboard(text.as_str())?
                             }
                         };

src/components/command.rs

@@ -99,9 +99,13 @@ pub fn tab_records(key: &KeyConfig) -> CommandText {
     CommandText::new(format!("Records [{}]", key.tab_records), CMD_GROUP_TABLE)
 }
 
-pub fn tab_structure(key: &KeyConfig) -> CommandText {
+pub fn tab_columns(key: &KeyConfig) -> CommandText {
+    CommandText::new(format!("Columns [{}]", key.tab_columns), CMD_GROUP_TABLE)
+}
+
+pub fn tab_constraints(key: &KeyConfig) -> CommandText {
     CommandText::new(
-        format!("Structure [{}]", key.tab_structure),
+        format!("Constraints [{}]", key.tab_constraints),
         CMD_GROUP_TABLE,
     )
 }
@@ -109,8 +113,8 @@ pub fn tab_structure(key: &KeyConfig) -> CommandText {
 pub fn toggle_tabs(key_config: &KeyConfig) -> CommandText {
     CommandText::new(
         format!(
-            "Tab [{},{}]",
-            key_config.tab_records, key_config.tab_structure
+            "Tab [{},{},{}]",
+            key_config.tab_records, key_config.tab_columns, key_config.tab_constraints
         ),
         CMD_GROUP_GENERAL,
     )

src/components/tab.rs

@@ -16,7 +16,8 @@ use tui::{
 #[derive(Debug, Clone, Copy, EnumIter)]
 pub enum Tab {
     Records,
-    Structure,
+    Columns,
+    Constraints,
 }
 
 impl std::fmt::Display for Tab {
@@ -45,7 +46,8 @@ impl TabComponent {
     fn names(&self) -> Vec<String> {
         vec![
             command::tab_records(&self.key_config).name,
-            command::tab_structure(&self.key_config).name,
+            command::tab_columns(&self.key_config).name,
+            command::tab_constraints(&self.key_config).name,
         ]
     }
 }
@@ -74,8 +76,11 @@ impl Component for TabComponent {
         if key == self.key_config.tab_records {
             self.selected_tab = Tab::Records;
             return Ok(EventState::Consumed);
-        } else if key == self.key_config.tab_structure {
-            self.selected_tab = Tab::Structure;
+        } else if key == self.key_config.tab_columns {
+            self.selected_tab = Tab::Columns;
+            return Ok(EventState::Consumed);
+        } else if key == self.key_config.tab_constraints {
+            self.selected_tab = Tab::Constraints;
             return Ok(EventState::Consumed);
         }
         Ok(EventState::NotConsumed)

src/components/table.rs

@@ -48,7 +48,7 @@ impl TableComponent {
 
     fn title(&self) -> String {
         self.table.as_ref().map_or(" - ".to_string(), |table| {
-            format!("{}/{}", table.0.name, table.1.name)
+            format!("{}.{}", table.0.name, table.1.name)
         })
     }
 

src/config.rs

@@ -79,7 +79,8 @@ pub struct KeyConfig {
     pub extend_selection_by_one_cell_up: Key,
     pub extend_selection_by_one_cell_down: Key,
     pub tab_records: Key,
-    pub tab_structure: Key,
+    pub tab_columns: Key,
+    pub tab_constraints: Key,
 }
 
 impl Default for KeyConfig {
@@ -108,7 +109,8 @@ impl Default for KeyConfig {
             extend_selection_by_one_cell_down: Key::Char('J'),
             extend_selection_by_one_cell_up: Key::Char('K'),
             tab_records: Key::Char('1'),
-            tab_structure: Key::Char('2'),
+            tab_columns: Key::Char('2'),
+            tab_constraints: Key::Char('3'),
         }
     }
 }

src/database/mod.rs

@@ -24,6 +24,16 @@ pub trait Pool {
         &self,
         database: &Database,
         table: &Table,
-    ) -> anyhow::Result<(Vec<String>, Vec<Vec<String>>)>;
+    ) -> anyhow::Result<Vec<Box<dyn TableRow>>>;
+    async fn get_constraints(
+        &self,
+        database: &Database,
+        table: &Table,
+    ) -> anyhow::Result<Vec<Box<dyn TableRow>>>;
     async fn close(&self);
 }
+
+pub trait TableRow: std::marker::Send {
+    fn fields(&self) -> Vec<String>;
+    fn columns(&self) -> Vec<String>;
+}

src/database/mysql.rs

@@ -1,4 +1,4 @@
-use super::{Pool, RECORDS_LIMIT_PER_PAGE};
+use super::{Pool, TableRow, RECORDS_LIMIT_PER_PAGE};
 use async_trait::async_trait;
 use chrono::NaiveDate;
 use database_tree::{Child, Database, Table};
@@ -18,6 +18,61 @@ impl MySqlPool {
     }
 }
 
+pub struct Constraint {
+    name: String,
+    column_name: String,
+}
+
+impl TableRow for Constraint {
+    fn fields(&self) -> Vec<String> {
+        vec!["name".to_string(), "column_name".to_string()]
+    }
+
+    fn columns(&self) -> Vec<String> {
+        vec![self.name.to_string(), self.column_name.to_string()]
+    }
+}
+
+pub struct Column {
+    name: Option<String>,
+    r#type: Option<String>,
+    null: Option<String>,
+    default: Option<String>,
+    comment: Option<String>,
+}
+
+impl TableRow for Column {
+    fn fields(&self) -> Vec<String> {
+        vec![
+            "name".to_string(),
+            "type".to_string(),
+            "null".to_string(),
+            "default".to_string(),
+            "comment".to_string(),
+        ]
+    }
+
+    fn columns(&self) -> Vec<String> {
+        vec![
+            self.name
+                .as_ref()
+                .map_or(String::new(), |name| name.to_string()),
+            self.r#type
+                .as_ref()
+                .map_or(String::new(), |r#type| r#type.to_string()),
+            self.null
+                .as_ref()
+                .map_or(String::new(), |null| null.to_string()),
+            self.default
+                .as_ref()
+                .map_or(String::new(), |default| default.to_string()),
+            self.comment
+                .as_ref()
+                .map_or(String::new(), |comment| comment.to_string()),
+        ]
+    }
+}
+
 #[async_trait]
 impl Pool for MySqlPool {
     async fn get_databases(&self) -> anyhow::Result<Vec<Database>> {
@@ -92,27 +147,53 @@ impl Pool for MySqlPool {
         &self,
         database: &Database,
         table: &Table,
-    ) -> anyhow::Result<(Vec<String>, Vec<Vec<String>>)> {
+    ) -> anyhow::Result<Vec<Box<dyn TableRow>>> {
         let query = format!(
             "SHOW FULL COLUMNS FROM `{}`.`{}`",
             database.name, table.name
         );
         let mut rows = sqlx::query(query.as_str()).fetch(&self.pool);
-        let mut headers = vec![];
-        let mut records = vec![];
+        let mut columns: Vec<Box<dyn TableRow>> = vec![];
         while let Some(row) = rows.try_next().await? {
-            headers = row
-                .columns()
-                .iter()
-                .map(|column| column.name().to_string())
-                .collect();
-            let mut new_row = vec![];
-            for column in row.columns() {
-                new_row.push(convert_column_value_to_string(&row, column)?)
-            }
-            records.push(new_row)
+            columns.push(Box::new(Column {
+                name: row.try_get("Field")?,
+                r#type: row.try_get("Type")?,
+                null: row.try_get("Null")?,
+                default: row.try_get("Default")?,
+                comment: row.try_get("Comment")?,
+            }))
         }
-        Ok((headers, records))
+        Ok(columns)
+    }
+
+    async fn get_constraints(
+        &self,
+        database: &Database,
+        table: &Table,
+    ) -> anyhow::Result<Vec<Box<dyn TableRow>>> {
+        let mut rows = sqlx::query(
+            "
+        SELECT
+            COLUMN_NAME,
+            CONSTRAINT_NAME
+        FROM
+            information_schema.KEY_COLUMN_USAGE
+        WHERE
+            TABLE_SCHEMA = ?
+            AND TABLE_NAME = ?
+        ",
+        )
+        .bind(&database.name)
+        .bind(&table.name)
+        .fetch(&self.pool);
+        let mut constraints: Vec<Box<dyn TableRow>> = vec![];
+        while let Some(row) = rows.try_next().await? {
+            constraints.push(Box::new(Constraint {
+                name: row.try_get("CONSTRAINT_NAME")?,
+                column_name: row.try_get("COLUMN_NAME")?,
+            }))
+        }
+        Ok(constraints)
     }
 
     async fn close(&self) {
@@ -124,7 +205,7 @@ fn convert_column_value_to_string(row: &MySqlRow, column: &MySqlColumn) -> anyho
     let column_name = column.name();
     if let Ok(value) = row.try_get(column_name) {
         let value: Option<String> = value;
-        return Ok(value.map_or("NULL".to_string(), |v| v.to_string()));
+        return Ok(value.unwrap_or_else(|| "NULL".to_string()));
     }
     if let Ok(value) = row.try_get(column_name) {
         let value: Option<&str> = value;

src/database/postgres.rs

@@ -1,4 +1,4 @@
-use super::{Pool, RECORDS_LIMIT_PER_PAGE};
+use super::{Pool, TableRow, RECORDS_LIMIT_PER_PAGE};
 use async_trait::async_trait;
 use chrono::NaiveDate;
 use database_tree::{Child, Database, Schema, Table};
@@ -19,6 +19,61 @@ impl PostgresPool {
     }
 }
 
+pub struct Constraint {
+    name: String,
+    column_name: String,
+}
+
+impl TableRow for Constraint {
+    fn fields(&self) -> Vec<String> {
+        vec!["name".to_string(), "column_name".to_string()]
+    }
+
+    fn columns(&self) -> Vec<String> {
+        vec![self.name.to_string(), self.column_name.to_string()]
+    }
+}
+
+pub struct Column {
+    name: Option<String>,
+    r#type: Option<String>,
+    null: Option<String>,
+    default: Option<String>,
+    comment: Option<String>,
+}
+
+impl TableRow for Column {
+    fn fields(&self) -> Vec<String> {
+        vec![
+            "name".to_string(),
+            "type".to_string(),
+            "null".to_string(),
+            "default".to_string(),
+            "comment".to_string(),
+        ]
+    }
+
+    fn columns(&self) -> Vec<String> {
+        vec![
+            self.name
+                .as_ref()
+                .map_or(String::new(), |name| name.to_string()),
+            self.r#type
+                .as_ref()
+                .map_or(String::new(), |r#type| r#type.to_string()),
+            self.null
+                .as_ref()
+                .map_or(String::new(), |null| null.to_string()),
+            self.default
+                .as_ref()
+                .map_or(String::new(), |default| default.to_string()),
+            self.comment
+                .as_ref()
+                .map_or(String::new(), |comment| comment.to_string()),
+        ]
+    }
+}
+
 #[async_trait]
 impl Pool for PostgresPool {
     async fn get_databases(&self) -> anyhow::Result<Vec<Database>> {
@@ -46,11 +101,11 @@ impl Pool for PostgresPool {
         let mut tables = Vec::new();
         while let Some(row) = rows.try_next().await? {
             tables.push(Table {
-                name: row.get("table_name"),
+                name: row.try_get("table_name")?,
                 create_time: None,
                 update_time: None,
                 engine: None,
-                schema: row.get("table_schema"),
+                schema: row.try_get("table_schema")?,
             })
         }
         let mut schemas = vec![];
@@ -147,7 +202,7 @@ impl Pool for PostgresPool {
         &self,
         database: &Database,
         table: &Table,
-    ) -> anyhow::Result<(Vec<String>, Vec<Vec<String>>)> {
+    ) -> anyhow::Result<Vec<Box<dyn TableRow>>> {
         let table_schema = table
             .schema
             .as_ref()
@@ -157,21 +212,49 @@ impl Pool for PostgresPool {
         )
         .bind(&database.name).bind(table_schema).bind(&table.name)
         .fetch(&self.pool);
-        let mut headers = vec![];
-        let mut records = vec![];
+        let mut columns: Vec<Box<dyn TableRow>> = vec![];
         while let Some(row) = rows.try_next().await? {
-            headers = row
-                .columns()
-                .iter()
-                .map(|column| column.name().to_string())
-                .collect();
-            let mut new_row = vec![];
-            for column in row.columns() {
-                new_row.push(convert_column_value_to_string(&row, column)?)
-            }
-            records.push(new_row)
+            columns.push(Box::new(Column {
+                name: row.try_get("column_name")?,
+                r#type: row.try_get("data_type")?,
+                null: row.try_get("is_nullable")?,
+                default: row.try_get("column_default")?,
+                comment: None,
+            }))
         }
-        Ok((headers, records))
+        Ok(columns)
+    }
+
+    async fn get_constraints(
+        &self,
+        _database: &Database,
+        table: &Table,
+    ) -> anyhow::Result<Vec<Box<dyn TableRow>>> {
+        let mut rows = sqlx::query(
+            "
+        SELECT
+            tc.constraint_name, tc.table_name, kcu.column_name,
+            ccu.table_name AS foreign_table_name,
+            ccu.column_name AS foreign_column_name
+        FROM
+            information_schema.table_constraints AS tc
+        JOIN information_schema.key_column_usage AS kcu
+            ON tc.constraint_name = kcu.constraint_name
+        JOIN information_schema.constraint_column_usage AS ccu
+            ON ccu.constraint_name = tc.constraint_name
+        WHERE ccu.table_name = $1
+        ",
+        )
+        .bind(&table.name)
+        .fetch(&self.pool);
+        let mut constraints: Vec<Box<dyn TableRow>> = vec![];
+        while let Some(row) = rows.try_next().await? {
+            constraints.push(Box::new(Constraint {
+                name: row.try_get("constraint_name")?,
+                column_name: row.try_get("column_name")?,
+            }))
+        }
+        Ok(constraints)
     }
 
     async fn close(&self) {