I am learning DRF.

So I have 2 models, Teams and Competitions.

This are my models:

class Team(models.Model):
    """Model representing Team object"""
    club = models.ForeignKey(
        Club,
        on_delete=models.CASCADE,
        related_name="teams",
        null=True,
        blank=True
    )
    name = models.CharField(
        max_length=200,
        help_text="Team name",
        verbose_name="Team name"
    )

    deputy = models.ForeignKey(
        User,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
    )

    competition = models.ForeignKey(
        Competition,
        on_delete=models.CASCADE
    )

    last_updated = models.DateTimeField(
        auto_now=timezone.now
    )

class Competition(models.Model):
    name = models.CharField(
        max_length=254,
        null=False,
        blank=False
    )
    
    last_updated = models.DateTimeField(
        auto_now=timezone.now
    )

    season = models.ForeignKey(
        Season,
        on_delete=models.CASCADE,
        related_name="season"
    )
    
    age_category = models.ForeignKey(
        AgeCategory,
        on_delete=models.CASCADE,
        related_name="age_category"
    )
    
    def __str__(self):
        return self.name
    

And here are serializers:

class TeamSerializer(serializers.ModelSerializer):
    competition = CompetitionSerializer()
    class Meta:
        model = Team
        fields = ("id", "club", "name", "deputy", "competition", "last_updated")

class CompetitionSerializer(serializers.ModelSerializer):
    season = SeasonSerializer(read_only=True)
    age_category = AgeCategorySerializer(read_only=True)
    class Meta:
        model = Competition
        fields = ("__all__")

When I make GET request I receive output like this:

    {
        "id": 1,
        "club": 1,
        "name": "Vive Kielce",
        "deputy": null,
        "competition": {
            "id": 1,
            "season": {
                "id": 1,
                "name": "2023/2024",
                "date_start": "2023-09-01",
                "date_end": "2024-06-30",
                "is_active": true,
                "last_updated": "2024-02-08T14:57:20.908198Z"
            },
            "age_category": {
                "id": 1,
                "name": "Senior",
                "last_updated": "2024-02-08T14:57:26.910396Z"
            },
            "name": "ORLEN Superliga",
            "last_updated": "2024-02-08T14:57:48.592856Z"
        },
        "last_updated": "2024-02-08T14:58:45.095590Z"
    },

which is fine.

Now I would like to make a POST request to create a new Team object, but I don’t want to send full dict for competition, but I just want to use the ID of already existing object.

I used curl to make a POST request

curl -d '{"club": "1", "name": "Test Team 1", "competition": 1}' -H "Content-Type: application/json" -X POST http://localhost:8000/api/teams/

but received below error message

{"competition":{"non_field_errors":["Invalid data. Expected a dictionary, but got int."]}}

I send dict

curl -d '{"club": "5", "name": "Chrobry Glogow", "competition": {"id": "1"}}' -H "Content-Type: application/json" -X POST http://localhost:8000/api/teams/

but got below message:

{"competition":{"name":["This field is required."]}

How can I achieve it?