Question

我创建了一个特性，如果它不存在，就会在数据库中创建一个表。该表在DB中完美创建但我收到错误。错误是由Illuminate \ Database \ Eloquent \ Concerns \ HasAttributes.php抛出

特点：

namespace App\Traits;
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

trait Translatable{

    //CREATE LANGUAGES TABLE IF DOES NOT EXIST
    public function createTranslationTable()
    {
        //ADD LANGUAGES TABLE IF DOES NOT EXIST
        if(Schema::hasTable('languages') === false){
            Schema::create('languages', function (Blueprint $table) {
                $table->increments('id');
                $table->string('language');
                $table->string('slug');
            });
        }

        //CREATE TRANSLATION TABLE IF DOES NOT EXIST
        if(Schema::hasTable('translations') === false){
            Schema::create('translations', function (Blueprint $table) {
                $table->increments('id');
                $table->string('model');
                $table->string('language_id');
                $table->foreign('language_id')->references('id')->on('languages')->onDelete('cascade');
                $table->string('field_name');
                $table->string('field_translation');
            });
        }
    }

    public function translateMe()
    {
        $this->createTranslationTable;
    }

}

ERROR：

App\User::createTranslationTable must return a relationship instance.

我正在使用一个特性，因为我希望它能够在任何模型中使用它，例如：

class User extends Authenticatable
{
    use Notifiable;
    use Translatable;

    /**
    * Call Translatable.
    *
    * @return void
    */
    public function __construct()
    {
        $this->translateMe();
    }

     /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
     protected $fillable = [
        'name', 'email', 'password',
     ];

     /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
     protected $hidden = [
        'password', 'remember_token',
     ];

    /**
    * The attributes that are translatable.
    *
    * @var array
    */
    protected $translatableItems = [
        'name'
    ];


}

Answer 1

我找到了解决方案，这是一个简单的解决方案。在Translatable特性中，我将createTranslationTable方法称为属性，而不是方法。所以只需添加两个parentesis修复它。

在：

public function translateMe()
{
    $this->createTranslationTable;
}

现在：

public function translateMe()
{
    $this->createTranslationTable();
}

如何在Trait中创建数据库表？

1 个答案: