Display choicefield in admin as input field - django

Question

I have a database of maybe 100 users that have each 5-10k products linked to them. In the admin panel loading that page is really slow because of the many products. So what I want to do is replacing it with a regex or at least a number input field that does not preload all the products:
models:
class Store(models.Model):
name = models.CharField("name", max_length = 128)
user = models.OneToOneField(User, on_delete = models.CASCADE, )
testproduct = models.Foreignkey(Product, on_delete = models.CASCADE, null = True, blank = True)
class Product(models.Model):
data = models.JSONField()
number = models.PositiveIntegerField()
store = models.ForeignKey(Store, on_delete = models.CASCADE)
admin:
class StoreAdmin(admin.ModelAdmin):
list_display = ["name", ...]
raw_id_fields = ["testproduct", ...]
This way I get an id input field on the admin page:
Is there any way I can make it a regex field, so I can search through the data attribute of my products as well as the number attribute?

Answer 1

I think, best way to achieve your goal is to add extra field to your model admin form and override save method for it, try this:
#admin.py
from django import forms
class StoreAdminModelForm(forms.ModelForm):
regex_field = forms.CharField()
def save(self, commit=True):
product_regex = self.cleaned_data.get('regex_field', None)
instance = super(StoreAdminModelForm, self).save(commit=commit)
# put some more regex validations here
if len(product_regex) > 0:
product = Product.objects.filter(data__regex=product_regex).first()
if product:
instance.testproduct = product
else:
raise forms.ValidationError('Product with data satisfying regex was not found!')
if commit:
instance.save()
return instance
class Meta:
model = Store
fields = '__all__'
class StoreAdmin(admin.ModelAdmin):
form = StoreAdminModelForm
raw_id_fields = ["testproduct", ]
fields = ('name ', 'user', 'testproduct', 'regex_field')
readonly_fields = ('user', )
So, the result - you will have special field for regex expression and you will try to get testproduct based on that field (without touching raw_id_field)