提交表单后，Laravel 5.2一对一关系给出错误消息“ SQLSTATE [23000]：”

Question

我在laravel 5.2中创建了两个表，一个表称为“用户”，另一个表称为“ artists_details”，它们具有一对一的关系。 用户表的架构如下

Schema::create('users', function (Blueprint $table) {
        $table->engine = 'InnoDB';
        $table->increments('id');
        $table->boolean('admin')->nullable();
        $table->boolean('manager')->nullable();
        $table->string('name');
        $table->string('email')->unique();
        $table->string('password', 60);
        $table->rememberToken();
        $table->timestamps();
    });

并且Artists表的架构如下

Schema::create('artists_details', function (Blueprint $table) {
        $table->engine = 'InnoDB';
        $table->integer('user_id')->unsigned();
        $table->string('artists_image_path');
        $table->string('name');
        $table->integer('phone_no');
        $table->integer('passport');
        $table->string('city');
        $table->string('county');
        $table->string('facebook_name');
        $table->string('twitter_handle');
        $table->string('email');
        $table->string('alternative_email');
        $table->string('website');
        $table->text('biography');
        $table->timestamps();

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

    });

我已经在模型中指出了以下关系用户模型

public function artists_relation()
{
    return $this->hasOne('App\artists_details_model');
}

并在artist_details_model上如下

public function user_artist_details()
{
    return $this->belongsTo('App\User');
}

在控制器中处理表单提交的php代码如下

public function artists_details_store(Request $request)
{
  $input = \Request::all();
  $file = $request->file('file');

   $name = time(). $file->getClientOriginalName();

   $file->move('artists_image/photo', $name);



  $artists_input = new artists_details_model;

  $artists_input->artists_image_path  = 'artists_image/photo/'. $name;
  $artists_input->name                = $input['name'];
  $artists_input->phone_no            = $input['phone_no'];
  $artists_input->passport            = $input['passport'];
  $artists_input->city                = $input['city'];
  $artists_input->county              = $input['county'];
  $artists_input->facebook_name       = $input['facebook_name'];
  $artists_input->twitter_handle      = $input['twitter_handle'];
  $artists_input->email               = $input['email'];
  $artists_input->alternative_email   = $input['alternative_email'];
  $artists_input->website             = $input['website'];
  $artists_input->biography           = $input['biography'];
  $artists_input->save();


    return redirect('create');
}

当我单击提交按钮时，出现以下错误信息

Connection.php第669行的QueryException：

SQLSTATE [23000]：违反完整性约束：1452无法添加或更新子行：外键约束失败

我似乎看不到我要去哪里或问题出在哪里

Answer 1

对于表“ artists_details”，您提到的是

$table->foreign('user_id') ->references('id') ->on('users')

因此，每当您尝试将详细信息保存在“ artists_details”中时，都需要提供“ user_id”，否则将无法保存信息。

您需要传递“ UserID”作为隐藏参数，或者如果UserID保存在会话中，则需要从会话中检索它。

Answer 2

您似乎没有在表单中包含外键{user_id}