Question

我正在使用magento合并我的数据库并指定前缀＆＃39; edu _＆＃39;对于我的laravel表。我需要设置与magento的客户表即customer_entity的关系。

Schema::create('article_comments', function (Blueprint $table) {
        $table->increments('id');
        $table->text('comment');
        $table->integer('user_id')->unsigned();
        $table->integer('last_modified_by')->unsigned();
        $table->string('ip_address')->nullable();
        $table->boolean('active')->default(1);
        $table->foreign('user_id')->references('entity_id')->on('customer_entity');
        $table->timestamps();
        $table->softDeletes();
    });

在指定关系发货时，我收到错误，因为Laravel将customer_entity视为edu_customer_entity。

Cannot add foreign key constraint (SQL: alter table `edu_article_comments` add constraint article_com  
  ments_user_id_foreign foreign key (`user_id`) references `edu_customer_entity` (`entity_id`))

有没有办法解决这个问题？

Answer 1

分两步添加迁移：

public function up()
{
    Schema::create('article_comments', function (Blueprint $table) {
        $table->increments('id');
        $table->text('comment');
        $table->integer('user_id')->unsigned();
        $table->integer('last_modified_by')->unsigned();
        $table->string('ip_address')->nullable();
        $table->boolean('active')->default(1);
        $table->timestamps();
        $table->softDeletes();
    });

 Schema::table('article_comments', function (Blueprint $table) {
    $table->foreign('user_id')->references('entity_id')->on('customer_entity');
    });
}

编辑：
如果您想与已存在的表创建关系，请在最后再创建一个迁移文件以指定所有关系。

例如：

Schema::table('table', function(Blueprint $table) {
        $table->foreign('column')->references('column')->on('table')->onDelete('action');

    Schema::table('areas', function(Blueprint $table) {
        $table->foreign('column')->references('column')->on('tablename')->onDelete('action');
    });

Answer 2

将DB::raw()方法添加到on()关系方法中。像这样：

Schema::create('article_comments', function (Blueprint $table) {
        $table->increments('id');
        $table->text('comment');
        $table->integer('user_id')->unsigned();
        $table->integer('last_modified_by')->unsigned();
        $table->string('ip_address')->nullable();
        $table->boolean('active')->default(1);
        $table->foreign('user_id')->references('entity_id')->on(DB::raw('customer_entity'));
        $table->timestamps();
        $table->softDeletes();
    });

在laravel中使用一些没有前缀的表

2 个答案: