Schema::table('projects', function (Blueprint $table) {//$table->integer('user_id'); }); }/** * Reverse the migrations. * * @return void*/publicfunction down() { Schema::table('projects', function (Blueprint $table) {//$table->dropColumn('user_id'); }); }...
1publicfunctionup()2{3 Schema::table('authors',function($table) {4$table ->string('email', 64);5});6 } 有了添加方法,当然也需要添加回滚方法了,这里再次使用Schema::table()方法。 1publicfunctiondown()2{3 Schema::table('authors',function($table) {4$table ->dropColumn('email');5});...
Schema::create('users',function(Blueprint$table){ $table->increments('id'); }); 当然,在创建数据表的时候,你也可以使用任何数据库结构构造器的字段方法来定义数据表的字段。 检查数据表或字段是否存在 你可以方便地使用hasTable和hasColumn方法来检查数据表或字段是否存在: ...
To add a deleted_at column to your table, you may use the softDeletes method from a migration:1$table->softDeletes();Now, when you call the delete method on the model, the deleted_at column will be set to the current timestamp. When querying a model that uses soft deletes, the "...
问题:我知道我可以使用DB::raw和SQL函数来做这件事,但我想知道一种不使用DB::raw的方法,像这样我可以利用Carbon或其他php和Laravel功能。代码: ->whereDate('sub_weekdays(end_of_month(add_month(date_column)), 10))', '> 浏览13提问于2021-05-28得票数1 ...
To add a deleted_at column to your table, you may use the softDeletes method from a migration:1$table->softDeletes();Now, when you call the delete method on the model, the deleted_at column will be set to the current timestamp. When querying a model that uses soft deletes, the "...
Created Migration: 2020_10_04_225240_add_slug_column_to_events_table 然后手动实现迁移文件的 up 方法: 代码语言:txt AI代码解释 public function up() { Schema::table('events', function (Blueprint $table) { $table->string('slug')->nullable(); ...
The migration file contains two key methods:up()anddown(). Theup()method defines the changes you want to apply to your database, such as creating a table or adding a column. Thedown()method does the opposite: it reverses those changes, such as dropping the table or removing the column...
maatwebsite laravel excel导出列与下拉列表工作表事件的实现可能会相当混乱，很难找到例子，所以当我看到...
3.使用SwooleTable绑定FD与UserId,可选的,Swoole Table示例。也可以用其他全局存储服务,例如Redis/Memcached/MySQL,但需要注意多个Swoole Server实例时FD可能冲突。 4.与Nginx配合使用(推荐) 参考WebSocket代理 map $http_upgrade $connection_upgrade { default upgrade; ...