TIL(22.10.31) - DRF StringRelatedField / PrimaryKeyRelatedField

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---

StringRelatedField

class UserProfileSerializer(serializers.ModelSerializer):
    followers = serializers.StringRelatedField(many=True)   # email로 표현
    followings = serializers.StringRelatedField(many=True)

    class Meta:
        model = User
        fields = ("id","email", "followings", "followers")

{
    "id": 1,
    "email": "admin@aaa.aaa",
    "followings": [
        "test1@aaa.aaa",
        "test2@aaa.aaa"
    ],
    "followers": [
        "test1@aaa.aaa"
    ]
}

---

PrimaryKeyRelatedField

class UserProfileSerializer(serializers.ModelSerializer):
    followers = serializers.PrimaryKeyRelatedField(many=True, read_only=True)   # id 값으로 표현
    followings = serializers.StringRelatedField(many=True)
    
    class Meta:
        model = User
        fields = ("id","email", "followings", "followers")

{
    "id": 1,
    "email": "admin@aaa.aaa",
    "followings": [
        "test1@aaa.aaa",
        "test2@aaa.aaa"
    ],
    "followers": [
        2
    ]
}