Laravel 迁移：创建 2 个表用户表和广告表（外键引用用户 ID）

Question

我正在尝试创建包含引用用户表中“id”列的“user_id”列的广告表，但没有运气。

在错误消息中，我注意到框架没有传递用户表的列“id”。知道我设法通过使用“phpMyAdmin”手动解决了这个问题。

我想知道有没有其他方法可以解决这个问题？

Users Schema:
       Schema::create('users', function (Blueprint $table) {
        $table->bigIncrements('id');
        $table->string('name');
        $table->string('email')->unique();
        $table->timestamp('email_verified_at')->nullable();
        $table->string('password');
        $table->rememberToken();
        $table->timestamps();
    });

Advertisements Schema:
        Schema::create('advertisements', function (Blueprint $table) {
        $table->bigIncrements('id');
        $table->unsignedBigInteger('user_id');
        $table->string('name');
        $table->text('description');
        $table->mediumtext('image')->nullabe;
        $table->timestamps();

        $table->foreign('user_id')
                ->reference('id')
                ->on('users')
                ->onDelete('cascade');
    });

错误：

PDOException::("SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ') on delete cascade' at line 1").
PDO::prepare("alter table `advertisements` add constraint `advertisements_user_id_foreign` foreign key (`user_id`) references `users` () on delete cascade")

Answer 1

问题出在您的广告迁移代码中，您应该把它放在 ->references('id') 而不是 ->reference('id')

Advertisements Schema:
        Schema::create('advertisements', function (Blueprint $table) {
        $table->bigIncrements('id');
        $table->unsignedBigInteger('user_id');
        $table->string('name');
        $table->text('description');
        $table->mediumtext('image')->nullabe;
        $table->timestamps();

        $table->foreign('user_id')
                ->references('id')
                ->on('users')
                ->onDelete('cascade');
    });