Replaces surrogate key with a composite key

api/app/Models/SocialLogin.php

@@ -3,16 +3,22 @@
 class SocialLogin extends BaseModel
 {
     /**
-     * The primary key for the model.
+     * The attributes that are mass assignable.
      *
-     * @var string
+     * @var array
      */
-    protected $primaryKey = 'social_login_id';
+    protected $fillable = ['provider', 'token'];
 
     /**
-     * The attributes that are mass assignable.
+     * Overrides UuidTrait boot method.
      *
-     * @var array
+     * We override it with an empty method as we simply just want to prevent the
+     * event registration to automatically create a UUID primary key, as we do
+     * not use that in this model.
+     *
+     * @return void
      */
-    protected $fillable = ['provider', 'token'];
+    protected static function bootUuidTrait()
+    {
+    }
 }

api/database/migrations/2015_07_29_233138_create_social_logins_table.php

@@ -17,14 +17,12 @@ public function up()
     {
         $modelClass = static::MODEL;
         Schema::create($modelClass::getTableName(), function (Blueprint $table) use ($modelClass) {
-            $table->uuid('social_login_id');
-
             $table->uuid('user_id');
             $table->string('provider', 16);
             $table->string('token');
             $table->timestamps();
 
-            $table->primary('social_login_id');
+            $table->primary(['user_id', 'provider']);
             $table->foreign('user_id')
                 ->references('user_id')->on(User::getTableName())
                 ->onDelete('cascade');