Generally that means a type error between the two columns. I think there is a problem is the "models" table as the user_id on it might not be unsigned because there's a spelling error on the "->unsigned()" which would prevent it from being an unsigned int like on the "model_photosets" table. Check your database to confirm if you have the right data type on the models table.

rowright said:

Thanks for the answer. I tried to correct the spelling error in the type name (table models) and completely remove it, but it did not help me :c

@MyZik:

Follow below steps:

1. Run migration first for 'photoset_categories' and 'models'
2. Run migration for 'model_photosets' once above step 1) migration done

Here, the problem is your 'model_photosets' table migration run before the foreign key table migration(i.e. 'photoset_categories' and 'models')

Hope this works for you!

saurabhd said:

Hi! Thanks for the answer. I did everything as you said, but the error remained. I noticed a feature: when I change foreign key user_id to id it works. But this is not what I need.

Use below code in your CreateModelPhotosetsTable migration file

class CreateModelPhotosetsTable extends Migration
{
   /**
    * Run the migrations.
    *
    * @return void
    */
   public function up()
   {
       Schema::create('model_photosets', function (Blueprint $table) {
           $table->increments('id');
           $table->integer('model_id')->unsigned();
           $table->foreign('model_id')->references('user_id')->on('models')->onDelete('cascade')->unique()->unsigned();

           $table->integer('category_id')->unsigned();
           $table->foreign('category_id')->references('id')->on('photoset_categories')->onDelete('cascade');
       });
   }
}

Hope this work for you !