added preview image in establishment serializer

apps/establishment/models.py

@@ -1,11 +1,13 @@
 """Establishment models."""
 from functools import reduce
+
 from django.contrib.contenttypes import fields as generic
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 from phonenumber_field.modelfields import PhoneNumberField
+
 from location.models import Address
 from utils.models import (ProjectBaseMixin, ImageMixin, TJSONField,
                           TraslatedFieldsMixin, BaseAttributes)

apps/establishment/serializers.py

@@ -156,6 +156,7 @@ class EstablishmentSerializer(serializers.ModelSerializer):
     employees = EstablishmentEmployeeSerializer(source='actual_establishment_employees',
                                                 many=True)
     menu = MenuSerializers(source='menu_set', many=True, read_only=True)
+    preview_image = serializers.SerializerMethodField()
 
     class Meta:
         """Meta class."""
@@ -172,6 +173,7 @@ class EstablishmentSerializer(serializers.ModelSerializer):
             'type',
             'subtypes',
             'image',
+            'preview_image',
             'address',
             'tags',
             'awards',
@@ -183,3 +185,8 @@ class EstablishmentSerializer(serializers.ModelSerializer):
             'employees',
             'menu',
         )
+
+    def get_preview_image(self, obj):
+        """Get preview image"""
+        return obj.get_full_image_url(request=self.context.get('request'),
+                                      thumbnail_key='establishment_preview')

project/settings/base.py

@@ -323,6 +323,7 @@ THUMBNAIL_ALIASES = {
         'large': {'size': (1500, 0), },
         'default': {'size': (300, 200), 'crop': True},
         'gallery': {'size': (240, 160), 'crop': True},
+        'establishment_preview': {'size': (300, 280), 'crop': True},
     }
 }