= 200){ throw Exception('Error happened on update'); } return Category.fromJson(jsonDecode(response.body)); } Future<void> deleteCategory(id) async { String uri = '${baseUrl}categories/$id'; http.Response response = await http.delete(Uri.parse(uri), headers: { HttpHeaders.contentType...
使用文本数据类型时删除重复记录 我有一个存储电子邮件的大表(大约678,000行),我需要删除与电子邮件字段匹配的重复记录:到、从、主题、主体以及外键record_id。通常,我会使用以下语句删除重复项:FROM emailsSELECT MAX(email_id) FROM emails GROUP BY用text数据类型识别重复项的最佳 浏览0提问于2012-12-28得票...
Decrement a column's value by a given amount. int delete(mixed $id = null) Delete a record from the database. void truncate() Run a truncate statement on the table. Builder newQuery() Get a new instance of the query builder. Builder forSubQuery() Create a new query instan...
'<',11)->delete(); //returns 11 (the number of the records deleted) //lets call delete again $result2=User::where('id','<',11)->delete(); //returns 0 (we have already delete the id<11 users, so this time we delete nothing, the result should be the number of the records d...
If the table has an auto-incrementing id, use the insertGetId method to insert a record and then retrieve the ID:$id = DB::table('users')->insertGetId( ['email' => 'john@example.com', 'votes' => 0] );When using PostgreSQL the insertGetId method expects the auto-incrementing column...
Eloquent ORM 是 Laravel 中的 Active Record 实现。它简单、强大,易于处理和管理。 对于每个数据库表,你都需要一个新的 Model Instance 来从 Eloquent 中受益。 假设你有一个posts表,并且你想要从 Eloquent 中受益;你需要导航到app/models,并将此文件保存为Post.php(表名的单数形式): ...
//关联删除,删除user_id=19 的书 $user = User::find(19); $user->book()->delete(); 1. 2. 3. 执行的SQL为: select * from `laravel_users` where `laravel_users`.`id` = 19 limit 1 delete from `laravel_books` where `laravel_books`.`user_id` = 19 and `laravel_books`.`user_id...
Hlw... I am new in ajax , I want's to delete a record using ajax call with laravel which handle that the page to not relode or refresh. this is my view {!! Form::open(['url'=>'wishlist/destroy', 'class'=>'form-horizontal nobottommargin quick-contact-from']) !!} {...
public function putRecord() { $user = User::find(Input::get('user_id')); $user->username = Input::get('username'); $user->email = Input::get('email'); $user->save(); return Redirect::to('users'); } public function deleteRecord() ...
To create a new record in the database, simply create a new model instance, set attributes on the model, then call the save method: 为了在数据库中创建一条新的记录,简单创建一条新的model实例,设置属性,然后调用save方法来保存。 <?php