Django Inline Tabular admin: delete an object not working - django

Question

I'm using Django admin.TabularInline class inorder to add multiple objects in a Foreinkey relationship as below:
admin.py:
class HeadFlowDatasetInline(admin.TabularInline):
model = HeadFlowDataset
extra = 0
class ProductAdmin(admin.ModelAdmin):
list_display = (
...
)
search_fields = (
...
)
fields = (
...
)
inlines = [HeadFlowDatasetInline]
def save_model(self, request, obj, form, change):
obj.created_by = request.user
obj.last_updated_by = request.user
obj.save()
def save_formset(self, request, form, formset, change):
instances = formset.save(commit=False)
for instance in instances:
instance.user = request.user
instance.save()
Also these are my models for Product and HeadFlowDataset:
class Product(models.Model):
id = models.UUIDField(
primary_key=True,
default=uuid.uuid4,
editable=False,
)
main_model = models.ForeignKey(
MainModel,
on_delete=models.SET_NULL,
null=True,
verbose_name="نام مدل اصلی پمپ",
)
usage = models.ManyToManyField(Usage)
sub_usage = models.ManyToManyField(SubUsage)
pump_type = models.ForeignKey(
PumpType,
on_delete=models.SET_NULL,
null=True,
verbose_name="تیپ پمپ",
)
pump_name = models.CharField(
max_length=255,
null=False,
blank=False,
verbose_name="نام محصول",
unique=True,
)
... # other fields not related to this question.
def __str__(self):
return self.pump_name
class HeadFlowDataset(models.Model):
id = models.UUIDField(
primary_key=True,
default=uuid.uuid4,
editable=False,
)
product = models.ForeignKey(
Product,
on_delete=models.CASCADE,
)
head = models.FloatField()
flow = models.FloatField()
def __str__(self):
return self.product.pump_name
And for this purpose, this approach is working just fine. But the problem occurs when I'm trying to remove a HeadFlowDataset object from the add product object page. As shown in the picture below, there is a checkbox item in front of each HeadFlowDataset object, but checking it and saving does not work. I could not find any other way to make this work neither. Can anyone show me a way to do this?

Answer 1

because you set the commit to False then the operations don't run by default like delete and save you can use your formset.deleted_objects to iterate and delete them if have a delete permission