Save multiple relational objects in foreign key django

Question

I want to make one to many relation between models and in Django, we need to use ForeignKey for it. I will multiple IDs of the relational objects in an array from the frontend but I'm confused that how will I save these multiple relational object in it? each package room can have multiple tags but the tags will have only one package room.

models.py

class Tag(models.Model):
    name = models.CharField(max_length=255, default='')
    description = models.CharField(max_length=255, default='')
    singleline = models.ManyToManyField(Singleline)

    class Meta:
        db_table = 'tags'



class PackageRoom(models.Model):
    name = models.CharField(max_length=255, default='')
    tags = models.ForeignKey(Tag, on_delete=models.PROTECT) 

    class Meta:
        db_table = 'package_rooms'

the JSON object I will receive from the frontend

{
   "name": "Test Room", 
   "tags": [1, 2, 3, 4, 5]  // IDs of Tags 
}

Amin · Accepted Answer · 2022-10-11 05:49:14Z

2

You can use PrimaryKeyRelatedField in your serializer and set its many=True:

class PackageSerializer(serializers.ModelSerializer):

    tags = serializers.PrimaryKeyRelatedField(queryset=Tag.objects.all(), many=True)

    class Meta:
        model = PackageRoom
        fields = ("name", "tags")

Docs is: https://www.django-rest-framework.org/api-guide/relations/#primarykeyrelatedfield

edited Oct 11, 2022 at 5:49

answered Dec 14, 2021 at 14:22

Amin

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2 Comments

dhiraka Over a year ago

queryset=Tag.objects.all() right? @Amin

Amin Over a year ago

Yeah sorry about that! I fixed it. @dhiraka

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