add fake best_price_menu

apps/establishment/models.py

@@ -152,6 +152,14 @@ class Establishment(ProjectBaseMixin, ImageMixin, TraslatedFieldsMixin):
             raise ValidationError('Establishment type of subtype does not match')
         self.establishment_subtypes.add(establishment_subtype)
 
+    @property
+    def best_price_menu(self):
+        return 150
+
+    @property
+    def best_price_carte(self):
+        return 200
+
 
 class Position(BaseAttributes, TraslatedFieldsMixin):
     """Position model."""

apps/establishment/serializers.py

@@ -157,6 +157,9 @@ class EstablishmentSerializer(serializers.ModelSerializer):
                                                 many=True)
     menu = MenuSerializers(source='menu_set', many=True, read_only=True)
 
+    best_price_menu = serializers.DecimalField(max_digits=14, decimal_places=2, read_only=True)
+    best_price_carte = serializers.DecimalField(max_digits=14, decimal_places=2, read_only=True)
+
     class Meta:
         """Meta class."""
 
@@ -182,4 +185,6 @@ class EstablishmentSerializer(serializers.ModelSerializer):
             'comments',
             'employees',
             'menu',
+            'best_price_menu',
+            'best_price_carte'
         )