Django: How to create object which has ManyToManyField in shell? - django

Question

I think that showing code is much easier than explanation.
models.py
class Product(TimeStampedModel):
name = models.CharField(max_length=120, unique=True)
slug = models.SlugField(null=True, blank=True)
description = models.TextField(max_length=400, blank=True)
is_active = models.BooleanField(default=True)
place_category = models.ForeignKey(
"PlaceCategory",
related_name="products_by_place", # category.products_by_place.all()
)
subject_category_set = models.ManyToManyField(
"SubjectCategory",
related_name="products_by_subject", # category.products_by_subject.all()
)
objects = ProductManager()
class Meta:
ordering = ('-created',)
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse(
"products:product_detail",
kwargs={
"slug": self.slug,
}
)
class Category(TimeStampedModel):
name = models.CharField(max_length=25, unique=True)
is_active = models.BooleanField(default=True)
class Meta:
abstract = True
def __str__(self):
return self.name
class PlaceCategory(Category):
class Meta:
verbose_name = "Place Category"
verbose_name_plural = "Place Categories"
class SubjectCategory(Category):
class Meta:
verbose_name = "Subject Category"
verbose_name_plural = "Subject Categories"
This is what I'm trying to do in shell.
# place category
self.place_category = PlaceCategory.objects.create(name="학교")
# subject category
self.subject_category1 = SubjectCategory.objects.create(name="사람")
self.subject_category2 = SubjectCategory.objects.create(name="꽃병")
# product
self.product = Product.objects.create(
name="product name1",
place_category=self.place_category,
subject_category_set=(
self.subject_category1,
self.subject_category2,
)
)
But it doesn't work. Any idea?
What I could think of is moving ManyToManyField from Product to SubjectCategory.
But I want know as in my code. Thanks.

Answer 1

You need to add subject category to your product.
So do it like this:
# place category
self.place_category = PlaceCategory.objects.create(name="학교")
# subject category
self.subject_category1 = SubjectCategory.objects.create(name="사람")
self.subject_category2 = SubjectCategory.objects.create(name="꽃병")
# product
self.product = Product.objects.create(
name="product name1",
place_category=self.place_category,
)
self.product.subject_category_set.add(self.subject_category1)
self.product.subject_category_set.add(self.subject_category2)
or you can make something like this
list_of_subject_categories = [self.subject_category1, self.subject_category2]
self.product.subject_category_set.add(*list_of_subject_categories)