Nested serializer data in django rest framework

Question

I have 3 django models like this

To keep record of orders

class Orders(models.Model):
    restaurant = models.ForeignKey(Restaurant, on_delete=models.CASCADE, blank=True, null=True)
    total_amount = models.DecimalField(max_digits=10, decimal_places=2)

which articles are in order like pizza etc

class OrderArticle(models.Model):
    order = models.ForeignKey(Orders, on_delete=models.CASCADE)
    article = models.ForeignKey(Articles, on_delete=models.CASCADE)

Article options of articles in order (like topping on pizza , now topping can be 4 or more types)

class OrderArticleOptions(models.Model):
    article_option = models.ForeignKey(ArticlesOptions, on_delete=models.CASCADE)
    order_article = models.ForeignKey(OrderArticle, on_delete=models.CASCADE)
    quantity = models.IntegerField(default=1)
    price = models.DecimalField(max_digits=10, decimal_places=2)

To keep track of this multipul type of Article options I made this table . So example will be . Customer purchased a pizza with 2 toppings , 1st topping fajita quantiity is 1 and 2nd topping oliva quantity is 3 .

to get this use case using Django Rest framework what should I do ?

Issue

I want data like this

data {

orders[

 article1
     {
      articleoptio1
       {}
      articleoption2
       {}        
      }

]

}

Now issue is when I add 2 type of toppings to a single article in order, it creates 2 diff orders with 2 articles with each article option. While I want 1 article with 2 article options .

Maybe this can help you formsets

Jacek B Budzynski
– Jacek B Budzynski

2019-10-21 12:17:44 +00:00
Commented Oct 21, 2019 at 12:17 — Jacek B Budzynski
– Jacek B Budzynski, Commented Oct 21, 2019 at 12:17
@JacekBBudzynski kindly have a look now

gamer
– gamer

2019-10-21 17:49:35 +00:00
Commented Oct 21, 2019 at 17:49 — gamer
– gamer, Commented Oct 21, 2019 at 17:49

HabibUllah Khan · Accepted Answer · 2019-10-22 09:51:04Z

1

class ArticlesSerializer(ModelSerializer):
    class Meta:
        model = Articles
        fields = "__all__"


class OrderSerializer(ModelSerializer):
    articles = ArticlesSerializer(source="resturant.article", many=True)
    class Meta:
        model = Orders
        fields = "__all__"

Ok here I am using nested serializer, with key, "source". "source" is a little bit advanced concept I am sorry for using that, but I can't see any other optimal way. You can call the serializer from your views.

If you want to see learn more about nested serializers, I recommend you see the tutorial,

https://www.youtube.com/watch?v=rAJAC_P52VU

answered Oct 22, 2019 at 9:51

HabibUllah Khan

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2 Comments

gamer Over a year ago

there is a sequence , first Orders - > Articles -> Article Options . you are just saying like this Orders - > Articles

HabibUllah Khan Over a year ago

Yes you have to keep in mind the sequence of your foreign keys. if you want to create Orders - > Articles -> Article Options. Create a serializer for Article Options and nest it inside the Articles Serializer, but again be mindful of the sequence of models(Foreign keys).

HabibUllah Khan · Accepted Answer · 2019-10-22 06:55:45Z

0

Try Nested Serializers, It will solve your problem. See the nested serializer docs.

https://www.django-rest-framework.org/api-guide/serializers/#dealing-with-nested-objects

answered Oct 22, 2019 at 6:55

HabibUllah Khan

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