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Django 4.1: implementing Admin Inline Forms Not Saving Related Model Data

๐Ÿ‘€ Views: 21 ๐Ÿ’ฌ Answers: 1 ๐Ÿ“… Created: 2025-08-08
django django-admin models Python

Hey everyone, I'm running into an issue that's driving me crazy. I'm trying to figure out I tried several approaches but none seem to work. I'm working with an scenario with Django 4.1 where the admin inline forms for a related model are not saving correctly. I have a `Book` model that has a one-to-many relationship with an `Author` model, and I've set up the inline model admin for `Author` within the `BookAdmin` class. However, when I try to add or update an author through the admin interface, the related `Author` instance is not being saved to the database. Hereโ€™s how my models and admin configuration look: ```python # models.py class Author(models.Model): name = models.CharField(max_length=100) book = models.ForeignKey('Book', related_name='authors', on_delete=models.CASCADE) class Book(models.Model): title = models.CharField(max_length=200) ``` ```python # admin.py from django.contrib import admin from .models import Book, Author class AuthorInline(admin.TabularInline): model = Author extra = 1 class BookAdmin(admin.ModelAdmin): inlines = [AuthorInline] admin.site.register(Book, BookAdmin) ``` When I submit the form after adding an author, I receive no behavior messages, but the `Author` instance does not appear in the `Book`'s related authors list. Iโ€™ve verified that the `Book` instance itself is being saved correctly before the inline form processing. I also tried overriding the `save_related` method in `BookAdmin` to see if I could debug the save process, but it didn't help. Hereโ€™s the code I tried: ```python def save_related(self, request, form, formsets, change): super().save_related(request, form, formsets, change) # Debugging: Check authors saved authors = formsets[0].instance.authors.all() print(authors) # This is showing an empty QuerySet ``` I've checked that the `Book` instance is correctly linked to the `Author` model via the foreign key, but it seems like the inline isnโ€™t capturing the data. Has anyone else faced this scenario or know what might be going wrong here? Any ideas what could be causing this? Any feedback is welcome! I appreciate any insights!