php artisan make:migration add_paid_to_users_table --table=users for Laravel 3: php artisan migrate:make add_paid_to_users You then need to use the Schema::table() method (as you're accessing an existing table, not creating a new one). And you can add a column like this: public...
是的,可以在其他列上呈现视图。但要实现这一点,您必须将该列设置为原始列,如下所示:
是的,可以在其他列上呈现视图。但要实现这一点,您必须将该列设置为原始列,如下所示:
function up() { DB::statement('alter table answers drop FOREIGN KEY answers_user_id_foreign;'); DB::statement('alter table answers add constraint answers_user_id_foreign foreign key (user_id) references users(id) on delete cascade;' ); } function down() { DB::statement('alter table an...
->addColumn('intro','Hi {{$name}}!') ->toJson(); }); Add Column with Closure useDataTables; Route::get('user-data',function(){ $model=App\User::query(); returnDataTables::eloquent($model) ->addColumn('intro',function(User$user){ ...
addColumn是backpack提供的一个方法,用于向关系表中添加新的列。 使用addColumn方法可以通过以下步骤来添加新列: 在Laravel项目中安装并配置backpack扩展包。 打开与关系表对应的数据库迁移文件,通常位于database/migrations目录下。 在迁移文件的up方法中使用Schema::table方法来操作关系表。例如,如果要向名为users的表...
Mariadb Alter Table Add Column if Not Exists Example - SQL Introduction In Mariadb, ALTER TABLE statement is used to add a new column to an existing table. However, if the table already has the same column, then the ALTER TABLE statement will fail with an error. To avoid this error, ...
行$table->increments('media_id');创建了一个自动递增的id列 * 和 * 一个主键。所以你随后的主键声明试图创建另一个主键,这是不允许的。自动递增id列不必是主键,但必须是索引。试试这个:
… 写三层的时候,遇到这样的情况怎么办? User{ int UserId, String UserName } Article...
At first create a migration to add new column to existing table by run artisan command: php artisan make:migration add_email_to_admin_users Open this migration file under database/migrations and add: public function up() { Schema::table('admin_users', function($table) { $table->string('...