我尝试迁移具有外键的表。每次我迁移表时都会产生一个错误,内容如下:
一般错误:1215 无法添加外键约束
这是我的表迁移:
Schema::create('profile_pictures', function (Blueprint $table) {
$table->bigIncrements('id');
$table->bigInteger('user_id')->nullable();
$table->binary('image')->nullable();
$table->timestamps();
$table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
});
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这是我的模型:
class ProfilePicture extends Model
{
protected $fillable = [
'user_id',
'image'
];
public function user()
{
$this->belongsTo(User::class, 'user_id', 'id');
}
}
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这是我的用户表迁移:
Schema::create('users', function (Blueprint $table) {
$table->bigIncrements('id');
$table->string('username');
$table->string('first_name')->nullable();
$table->string('last_name')->nullable();
$table->string('email')->unique();
$table->string('phone')->nullable();
$table->timestamp('email_verified_at')->nullable();
$table->string('password');
$table->rememberToken();
$table->timestamps();
});
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