Hi, I have two models:
class PrdLine(models.Model):
name = models.CharField(max_length=256, verbose_name='name', unique=
True)
comment = models.CharField(max_length=256, null=True, blank=True,
verbose_name='comment')
class Meta:
verbose_name = 'prdline'
verbose_name_plural = verbose_name
class Project(models.Model):
name = models.CharField(max_length=256, verbose_name='name')
prdline = models.ForeignKey(PrdLine, on_delete=models.CASCADE,
verbose_name='prdline')
comment = models.CharField(max_length=256, null=True, blank=True,
verbose_name='comment')
class Meta:
unique_together = (('name', 'prdline'),)
verbose_name = 'project'
verbose_name_plural = verbose_name
And I implement a custom relational field "PrdLineField":
class PrdLineSerializer(ModelSerializer):
links = serializers.SerializerMethodField()
# id = serializers.IntegerField(required=False)
class Meta:
model = PrdLine
fields = ('id', 'name', 'comment', 'links')
def get_links(self, obj):
request = self.context['request']
return {
'self': reverse('prdline-detail',
kwargs={'pk': obj.pk}, request=request)
}
class PrdLineField(serializers.RelatedField):
def to_representation(self, value):
return {'id': value.id, 'name': value.name}
def to_internal_value(self, data):
return data
def get_queryset(self):
queryset = self.queryset
if isinstance(queryset, (QuerySet, Manager)):
queryset = queryset.all()
print(queryset)
return queryset
class ProjectSerializer(ModelSerializer):
links = serializers.SerializerMethodField()
prdline = PrdLineField(label='prdline', )
class Meta:
model = Project
fields = ('id', 'name', 'prdline', 'comment', 'links')
def get_links(self, obj):
request = self.context['request']
return {
'self': reverse('project-detail',
kwargs={'pk': obj.pk}, request=request)
}
def create(self, validated_data):
prdline = validated_data.pop('prdline', None)
project = Project(**validated_data)
project.prdline_id = prdline
project.save()
return project
def update(self, instance, validated_data):
prdline_id = validated_data.pop('prdline', None)['id']
setattr(instance, 'prdline_id', prdline_id)
for attr, value in validated_data.items():
setattr(instance, attr, value)
instance.save()
return instance
If i access list of projects, the effect of field 'prdline' is ok:
[{
"id": 10,
"name": "eeeee",
"prdline": {
"name": "xxxxxxx",
"id": 1
},
"comment": "",
"links": {
"self": "http://192.168.154.133:9090/api/projects/10";
}
}]
I can create a project with the following json：
{
"name": "xxxxxx",
"prdline": 2,
"comment": "dddddd"
}
But I can not update the project through the above json,you must use:
{
"id": 10,
"name": "eeeee",
"prdline": {
"name": "xxxxxxxx",
"id": 6
},
"comment": ""
}
Can I use the following json to update a project?
{
"id": 10,
"name": "eeeee",
"prdline": 6
"comment": ""
}
Thank you for your help!
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