У меня есть две модели ProductTypeModel и ProductModel, product_type - это внешний ключ в продукте.Затем я написал ModelSerializer для продукта, чтобы получить все записи ProductModel и дополнительную информацию.Теперь я не могу получить product_sub_type из ProductTypeModel в ProductSerializer
Я пробовал SlugRelatedField в сериализаторах, пытался установить slug_field=product_sub_type и slug_field=product_type__product_sub_type и slug_field=product_type.product_sub_type
models.py
class ProductType(models.Model):
"""Product type model."""
id = models.UUIDField(
primary_key=True,
default=uuid.uuid4,
editable=False
)
hsn = models.ForeignKey(
HSN,
related_name='product_types',
on_delete=models.SET_NULL,
null=True, blank=True
)
product_type = models.CharField(max_length=255, null=True, blank=True)
product_sub_type = models.CharField(max_length=255, db_index=True)
description = models.CharField(max_length=255, null=True, blank=True)
def __str__(self):
return str(self.product_type)
def get_sub_type(self):
return str(self.product_sub_type)
class Meta:
db_table = 'ProductTypes'
unique_together = ('product_type', 'product_sub_type')
class Product(models.Model):
"""Products model."""
product_id = models.UUIDField(
primary_key=True,
default=uuid.uuid4,
editable=False
)
product_type = models.ForeignKey(
ProductType,
related_name='related_products',
on_delete=models.SET_NULL,
blank=True, null=True
)
name = models.CharField(max_length=255, db_index=True)
code_name = models.CharField(max_length=255, null=True, blank=True)
href = models.CharField(max_length=500, blank=True, null=True)
full_name = models.CharField(max_length=255, null=True, blank=True, db_index=True)
manufacturer = models.ForeignKey(
Manufacturer,
related_name='manufactured_products',
on_delete=models.SET_NULL,
null=True, blank=True
)
packing = models.CharField(max_length=255, null=True, blank=True)
packing_detail = models.CharField(max_length=255, null=True, blank=True)
mrp = models.DecimalField(
max_digits=8,
decimal_places=2,
null=True, blank=True
)
created_at = models.DateTimeField(
'created at',
db_index=True,
default=timezone.now
)
def __str__(self):
return str(self.full_name)
class Meta:
db_table = 'Products'
unique_together = ('code_name', 'product_type')
serializers.py
class ProductTypeSerializer(serializers.ModelSerializer):
# Serialize/Deserialize ProductType instance.
class Meta:
model = ProductType
fields = (
'id', 'hsn',
'product_type', 'product_sub_type',
'description'
)
read_only_fields = ('id', )
class ProductSerializer(serializers.ModelSerializer):
# Serialize/Deserialize Product instance.
manufacturer = serializers.StringRelatedField()
manufacturer_id = serializers.PrimaryKeyRelatedField(read_only=True)
product_sub_type = serializers.SlugRelatedField(slug_field=????)
class Meta:
model = Product
fields = (
'product_id',
'product_type', 'product_sub_type',
'name', 'code_name',
'manufacturer', 'manufacturer_id',
'full_name',
'packing', 'packing_detail',
'mrp'
)
read_only_fields = (
'product_id', 'created_at',
'product_type', 'manufacturer_id'
)
с slug_field=product_sub_type возвращает ImproperlyConfigured at /products/
Field name product_sub_type is not valid for model Product.
с slug_field=product_type.product_sub_type возвращает AttributeError at /products/
Got AttributeError when attempting to get a value for field product_sub_type on serializer ProductSerializer.The serializer field might be named incorrectly and not match any attribute or key on the Product instance.
Я хочу, чтобы сериализатор возвращал что-то вроде этого:
{
"count": 1,
"next": null,
"previous": null,
"results": [
{
"product_id": "fffcf7ba-5c6d-4190-96d2-cc9125e18e71",
"product_type": "1b3dd955-b67e-4ca3-9561-6d1704ff7c91",
"product_sub_type": "Capsules",
"name": "Enshine Toothpaste",
"code_name": null,
"manufacturer": "Leeford Healthcare Ltd",
"manufacturer_id": 2524,
"full_name": "Enshine Toothpaste",
"packing": null,
"packing_detail": null,
"mrp": null
}
]
}