What is the best way to use `ModelChoiceField` in `NestedTabularInline`

Recently, I've noticed that the detail screen in my web has been performing very slowly. After analyzing the issue, I found that it's caused by an inline containing a ModelChoiceField when number of instances too large. This field repeatedly executes SELECT * queries to the database, significantly slowing down the screen's loading time.

Eg: That inline have 50 instances, now it has 50 ModelChoiceField that's ramping 50 SELECT *

I tried various solutions, including setting the queryset to objects.none()

However, this approach led to a new problem: when editing, the data doesn't auto-select as expected. I attempted to address this by setting the initial value dynamically in the __init__ method, but it didn't work due to the lack of a queryset.

class ProductOptionForm(CustomDuplicateItemInlineForm):
    class Meta:
        model = ProductOption
        fields = '__all__'

    # override option để hiển thị autocomplete với size option
    option = forms.ModelChoiceField(
        queryset=PodOption.objects.none(),
        required=True,
        widget=CustomOptionSelect2(
            url='product-size-options-auto-complete',
        ),
        label='Size Option'
    )

    def __init__(self, *args, **kwargs):
        super(ProductOptionForm, self).__init__(*args, **kwargs)

        # Use the preloaded data to set the initial dynamically
        if self.instance and self.instance.pk and hasattr(self, 'product_size_options'):
            self.fields['option'].initial = self.product_size_options[self.instance.option_id]  # Manually set the result cache

It's all empty as you can see

If anyone knows the solution, please let me know. Thanks in advance!

class CustomOptionSelect2(autocomplete.Select2):

    def filter_choices_to_render(self, selected_choices):
        """Override filter_choices_to_render to prevent access database on initial."""
        if hasattr(self, 'initial'):
            value = ModelChoiceIteratorValue(
                self.initial.pk, self.initial
            )
            self.choices = [
                (value, f"{self.initial.type}: {self.initial.value}")
            ]
        else:
            super().filter_choices_to_render(selected_choices)