fix clippy warnings

src/app.rs

@@ -229,10 +229,7 @@ impl App {
 
     pub fn selected_database(&self) -> Option<&Database> {
         match self.selected_database.selected() {
-            Some(i) => match self.databases.get(i) {
-                Some(db) => Some(db),
-                None => None,
-            },
+            Some(i) => self.databases.get(i),
             None => None,
         }
     }

src/handlers/mod.rs

@@ -20,9 +20,8 @@ pub async fn handle_app(key: Key, app: &mut App) -> anyhow::Result<()> {
                     record_table::handler(key, app, focused).await?
                 }
             }
-            match key {
-                Key::Char('e') => app.input_mode = InputMode::Editing,
-                _ => (),
+            if let Key::Char('e') = key {
+                app.input_mode = InputMode::Editing
             }
         }
         InputMode::Editing => match key {

src/handlers/table_list.rs

@@ -5,8 +5,8 @@ use crate::utils::get_records;
 pub async fn handler(key: Key, app: &mut App, focused: bool) -> anyhow::Result<()> {
     if focused {
         match key {
-            Key::Char('j') => match app.selected_database.selected() {
-                Some(_) => {
+            Key::Char('j') => {
+                if app.selected_database.selected().is_some() {
                     app.record_table.column_index = 0;
                     app.next_table();
                     if let Some(database) = app.selected_database() {
@@ -19,10 +19,9 @@ pub async fn handler(key: Key, app: &mut App, focused: bool) -> anyhow::Result<(
                         }
                     }
                 }
-                None => (),
-            },
-            Key::Char('k') => match app.selected_database.selected() {
-                Some(_) => {
+            }
+            Key::Char('k') => {
+                if app.selected_database.selected().is_some() {
                     app.record_table.column_index = 0;
                     app.previous_table();
                     if let Some(database) = app.selected_database() {
@@ -35,8 +34,7 @@ pub async fn handler(key: Key, app: &mut App, focused: bool) -> anyhow::Result<(
                         }
                     }
                 }
-                None => (),
-            },
+            }
             Key::Esc => app.focus_type = FocusBlock::TableList(false),
             _ => (),
         }

src/utils.rs

@@ -68,7 +68,7 @@ pub fn convert_column_value_to_string(row: &MySqlRow, column: &MySqlColumn) -> S
             }
             Err(_) => "".to_string(),
         },
-        "VARCHAR" | "CHAR" | "ENUM" => row.try_get(column_name).unwrap_or("".to_string()),
+        "VARCHAR" | "CHAR" | "ENUM" => row.try_get(column_name).unwrap_or_else(|_| "".to_string()),
         "DATE" => match row.try_get(column_name) {
             Ok(value) => {
                 let value: NaiveDate = value;