supermarket category api working

cookbook/migrations/0105_auto_20210126_1604.py

@@ -0,0 +1,24 @@
+# Generated by Django 3.1.5 on 2021-01-26 15:04
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cookbook', '0104_auto_20210125_2133'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='supermarketcategoryrelation',
+            name='category',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='category_to_supermarket', to='cookbook.supermarketcategory'),
+        ),
+        migrations.AlterField(
+            model_name='supermarketcategoryrelation',
+            name='supermarket',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='category_to_supermarket', to='cookbook.supermarket'),
+        ),
+    ]

cookbook/models.py

@@ -162,8 +162,8 @@ class Supermarket(models.Model):
 
 
 class SupermarketCategoryRelation(models.Model):
-    supermarket = models.ForeignKey(Supermarket, on_delete=models.CASCADE)
-    category = models.ForeignKey(SupermarketCategory, on_delete=models.CASCADE)
+    supermarket = models.ForeignKey(Supermarket, on_delete=models.CASCADE, related_name='category_to_supermarket')
+    category = models.ForeignKey(SupermarketCategory, on_delete=models.CASCADE, related_name='category_to_supermarket')
     order = models.IntegerField(default=0)
 
 

cookbook/serializer.py

@@ -140,20 +140,6 @@ class UnitSerializer(UniqueFieldsMixin, serializers.ModelSerializer):
         read_only_fields = ('id',)
 
 
-class SupermarketCategoryRelationSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = SupermarketCategoryRelation
-        fields = "__all__"
-
-
-class SupermarketSerializer(UniqueFieldsMixin, serializers.ModelSerializer):
-    categories = SupermarketCategoryRelationSerializer(many=True, read_only=True)
-
-    class Meta:
-        model = Supermarket
-        fields = ('id', 'name', 'categories')
-
-
 class SupermarketCategorySerializer(UniqueFieldsMixin, WritableNestedModelSerializer):
 
     def create(self, validated_data):
@@ -170,6 +156,22 @@ class SupermarketCategorySerializer(UniqueFieldsMixin, WritableNestedModelSerial
         fields = ('id', 'name')
 
 
+class SupermarketCategoryRelationSerializer(serializers.ModelSerializer):
+    category = SupermarketCategorySerializer()
+
+    class Meta:
+        model = SupermarketCategoryRelation
+        fields = ('id', 'category', 'supermarket')
+
+
+class SupermarketSerializer(UniqueFieldsMixin, serializers.ModelSerializer):
+    category_to_supermarket = SupermarketCategoryRelationSerializer(many=True, read_only=True)
+
+    class Meta:
+        model = Supermarket
+        fields = ('id', 'name', 'category_to_supermarket')
+
+
 class FoodSerializer(UniqueFieldsMixin, WritableNestedModelSerializer):
     supermarket_category = SupermarketCategorySerializer(read_only=True)