Django admin - Allow inline entires once selected item - django

Question

I am trying to populate a dropdown in the Django admin panel based on a selected item.
I have a customer model
class Customer(BaseModel):
name = models.CharField(max_length=128)
company = models.ForeignKey("Company", models.PROTECT)
def __str__(self) -> str:
return f"{self.name}"
def save(self, **kwargs):
return super().save(**kwargs)
An invite model
class Invite(BaseModel):
full_name = models.CharField(max_length=128, blank=True)
email = WIEmailField(unique=True)
customer = models.ForeignKey(
to="Customer",
on_delete=models.PROTECT,
related_name="invites",
)
Customer Invite model that defines the invite and customer
class CustomerLocationInvite(BaseModel):
location = models.ForeignKey(
to=Location
)
invite = models.ForeignKey(
to=Invite,
blank=True,
)
Location Model
class Location(BaseModel):
name = models.CharField(max_length=128)
company = models.ForeignKey(
to= Company,
on_delete=models.PROTECT
)
address = models.CharField(max_length=128)
Inline for invite
class CustomerInviteInline(admin.TabularInline):
model = CustomerLocationInvite
fields = ("invite", "location", "created_at", "modified_at")
readonly_fields = ("created_at", "modified_at")
extra = 0
When creating a new Invite, Is it possible to:
Display the inline once a company has been selected?
When selecting a location from the inline, Filter out the locations based on the company they selected?

Answer 1

I assume you want to get the location from CustomerLocationInvite, and get the company from the location? If that is so, maybe you can try
CustomerLocationInvite.objects.filter(location__id=locationid)
Where the location's id can be received by
locationid = Location.objects.filter(company__id=companyid).id
But then since you said that the company is already selected, you should have its ID -- that is the value you will replace companyid with. You can then retrieve the inline admin from the CustomerLocationInvite object that you received in the first line.
SO reference
Doc reference
I'm not sure what you mean. Are you getting the list of companies, or are you getting the list of locations? That being said, please paste your Company model as well.