CODEWITHSUNDEEP
pythondjangodjango-modelsdjango-rest-frameworkdjango-queryset
Harisha M G
Harisha M G

Reputation: 68

Adding row to another table before inserting a row

I have a tag model like this:

class Tag(models.Model):
    tag = models.CharField(max_length=100)

and an image model like this:

class Image(models.Model):
    image_name=models.CharField(max_length=40,unique=False)
    ...
    tags = models.ManyToManyField(Tag)

It is currently taking the primary key of the tags table in the array instead of the string values like this:

{
    "image_name" : "abc.png",
    "tags" : [1, 2] 
}

However, I want to be able to create a new image with POST request with multiple tags, something like this:

{
    "image_name" : "abc.png",
    "tags" : ["logo", "abc"] 
}

When I do this, I want logo and abc to be inserted into Tags table automatically.

Is ManyToManyField correct way to do this? If so, how to achieve this?

Upvotes: 1

Views: 98

Answers (1)

aladeck
aladeck

Reputation: 97

By default nested serializers are read-only. If you want to support write-operations to a nested serializer field you'll need to create create() and/or update() methods in order to explicitly specify how the child relationships should be saved

Source: https://www.django-rest-framework.org/api-guide/relations/#writable-nested-serializers

Upvotes: 1

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