added flag on_top to model Collection, refactored CollectionList view

apps/collection/migrations/0004_collection_on_top.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.4 on 2019-08-23 13:22
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('collection', '0003_auto_20190823_0935'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='collection',
+            name='on_top',
+            field=models.BooleanField(default=False, verbose_name='Position on top'),
+        ),
+    ]

apps/collection/models.py

@@ -43,6 +43,8 @@ class Collection(ProjectBaseMixin, CollectionNameMixin,
     """Collection model."""
     is_publish = models.BooleanField(
         default=False, verbose_name=_('Publish status'))
+    on_top = models.BooleanField(
+        default=False, verbose_name=_('Position on top'))
     filters = JSONField(
         _('filters'), null=True, blank=True,
         default=None, help_text='{"key":"value"}')

apps/collection/serializers/common.py

@@ -11,7 +11,8 @@ class CollectionSerializer(serializers.ModelSerializer):
             'id',
             'name',
             'block_size',
-            'image'
+            'image',
+            'on_top'
         ]
 
 

apps/collection/views/common.py

@@ -33,7 +33,8 @@ class CollectionListView(CollectionViewMixin, generics.ListAPIView):
     def get_queryset(self):
         """Override get_queryset method"""
         return models.Collection.objects.published()\
-                                        .by_country_code(code=self.request.country_code)
+                                        .by_country_code(code=self.request.country_code)\
+                                        .order_by('-on_top', '-created')
 
 
 class CollectionRetrieveView(CollectionViewMixin, generics.RetrieveAPIView):