added orderByTranslation scope

src/Translatable/Translatable.php

@@ -4,6 +4,7 @@
 
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Query\JoinClause;
 use Illuminate\Database\Eloquent\Relations\Relation;
 use Illuminate\Database\Query\Builder as QueryBuilder;
 use Dimsav\Translatable\Exception\LocalesNotDefinedException;
@@ -677,6 +678,33 @@ public function scopeOrWhereTranslationLike(Builder $query, $key, $value, $local
         });
     }
 
+    /**
+     * This scope sorts results by the given translation field.
+     *
+     * @param \Illuminate\Database\Eloquent\Builder $query
+     * @param string                                $key
+     * @param string                                $sortmethod
+     *
+     * @return \Illuminate\Database\Eloquent\Builder|static
+     */
+    public function scopeOrderByTranslation(Builder $query, $key, $sortmethod = 'asc')
+    {
+        $translationTable = $this->getTranslationsTable();
+        $localeKey = $this->getLocaleKey();
+        $table = $this->getTable();
+        $keyName = $this->getKeyName();
+
+        return $query
+            ->join($translationTable, function (JoinClause $join) use ($translationTable, $localeKey, $table, $keyName) {
+                $join
+                    ->on($translationTable.'.'.$this->getRelationKey(), '=', $table.'.'.$keyName)
+                    ->where($translationTable.'.'.$localeKey, $this->locale());
+            })
+            ->orderBy($translationTable.'.'.$key, $sortmethod)
+            ->select($table.'.*')
+            ->with('translations');
+    }
+
     /**
      * @return array
      */

tests/ScopesTest.php

@@ -165,4 +165,16 @@ public function test_whereTranslationLike_filters_by_translation_and_locale()
         $this->assertSame(1, $result->count());
         $this->assertSame('gr', $result->first()->code);
     }
+
+    public function test_orderByTranslation_sorts_by_key_asc()
+    {
+        $result = Country::orderByTranslation('name')->get();
+        $this->assertSame(2, $result->first()->id);
+    }
+
+    public function test_orderByTranslation_sorts_by_key_desc()
+    {
+        $result = Country::orderByTranslation('name', 'desc')->get();
+        $this->assertSame(1, $result->first()->id);
+    }
 }