Django 4.2: implementing Dynamic Formsets and Inline Model Admin Validation
I've been working on this all day and I'm building a feature where I tried several approaches but none seem to work. I'm working on a personal project and I'm working with Django 4.2, trying to implement dynamic formsets for a model that has a OneToMany relationship with another model, specifically when using inline admin. My main scenario arises when I attempt to validate the formset before saving it, especially when the user adds multiple entries dynamically. I'm using the following approach for my inline admin: ```python from django.contrib import admin from django.forms import modelformset_factory from .models import ParentModel, ChildModel class ChildInline(admin.TabularInline): model = ChildModel extra = 1 # Allow adding one extra form class ParentAdmin(admin.ModelAdmin): inlines = [ChildInline] admin.site.register(ParentModel, ParentAdmin) ``` While this setup works fine for the initial rendering, once the user tries to add multiple child entries, I run into a validation scenario where the formset doesn't seem to validate the fields correctly, leading to misleading behavior messages like: ``` This field is required. ``` I have tried implementing a custom formset to handle validation, but it seems that the dynamic nature of the formset isn't being captured properly. My custom formset looks like this: ```python from django.forms import BaseInlineFormSet class ChildInlineFormSet(BaseInlineFormSet): def clean(self): super().clean() # Custom validation logic here ``` Despite this, when I render the formset on the client side, Django still complains about missing required fields, even when they are filled out correctly. I suspect that the behavior might be related to how I'm using JavaScript to add new forms dynamically on the client side, but I'm not sure where to look. I've implemented a simple script like this: ```javascript function addChildForm() { var formset = document.getElementById('id_child_set'); var newForm = formset.lastElementChild.cloneNode(true); // Logic to clear the values of the cloned form formset.appendChild(newForm); } ``` This seems to duplicate the last form correctly, but I'm not sure if there's a mismatch happening when it comes to the form field names or IDs. Any suggestions on how to ensure that the validation works correctly with dynamically added child forms in my Django admin setup would be greatly appreciated! Any help would be greatly appreciated! Any help would be greatly appreciated! I've been using Python for about a year now. Any feedback is welcome! The stack includes Python and several other technologies. Could someone point me to the right documentation? I'm working in a Windows 11 environment. Any feedback is welcome! For context: I'm using Python on Windows 11. Thanks in advance!