codigo actual del servidor, con avances de joan

app/Models/City.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use App;
+
+class City extends Model
+{
+    public function getTranslation($field = '', $lang = false){
+        $lang = $lang == false ? App::getLocale() : $lang;
+        $city_translation = $this->hasMany(CityTranslation::class)->where('lang', $lang)->first();
+        return $city_translation != null ? $city_translation->$field : $this->$field;
+    }
+
+    public function city_translations(){
+       return $this->hasMany(CityTranslation::class);
+    }
+
+    public function country()
+    {
+        return $this->belongsTo(Country::class);
+    }
+
+    public function state()
+    {
+        return $this->belongsTo(State::class);
+    }
+}