On Tue, Nov 28, 2017 at 9:12 AM, Jan Hartman <[email protected]> wrote:
> Hi, I'm having trouble with inlining models with a many-to-many
> relationship through the intermediary model. My models are recipes and
> categories (a category includes multiple recipes and a recipe can belong to
> multiple categories).
>
> Models (simplified):
> class Recipe(models.Model):
> title = models.CharField(_('Title'), max_length=100, unique=True)
> categories = models.ManyToManyField('Category', through='
> PairRecipeCategory', verbose_name=_('Categories'))
>
> class Category(models.Model):
> title = models.CharField(_('Title'), max_length=100, unique=True)
> recipes = models.ManyToManyField('Recipe', through='PairRecipeCategory',
> verbose_name=_('Recipes'))
>
> class PairRecipeCategory(models.Model):
> category = models.ForeignKey(Category, on_delete=models.CASCADE)
> recipe = models.ForeignKey(Recipe, on_delete=models.CASCADE)
>
>
>
> Admin:
>
> class RecipeInline(admin.TabularInline):
> model = PairRecipeCategory
> # fields = ['recipe__title']
>
>
> class CategoryInline(admin.TabularInline):
> model = PairRecipeCategory
> # fields = ['category__title']
>
> + ordinary recipe and category ModelAdmin classes
>
> What I want to do is to show *editable* fields from the parent model
> (Recipe or Category) in the inlined PairRecipeCategory model instead of
> just listing the inlines. I get the "Unknown field for model xyz error"
> because the fields are not reachable from the intermediary model if I
> uncomment the fields lines.
> I've read about this on StackOverflow and such and I could not find a
> working solution. If anyone has any (even hacky) ideas, I would really
> appreciate the help.
>
>
I think that you are creating an inline for the intermediary model. not an
inline for the other model, here is how you should:
https://docs.djangoproject.com/en/1.11/ref/contrib/admin/#working-with-many-to-many-models
And your code is for doing this:
https://docs.djangoproject.com/en/1.11/ref/contrib/admin/#working-with-many-to-many-intermediary-models
HTH :)
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