How to make required filling in a form field with a many-to-many relationship in django admin - django-models

Question

I have a Recipes model with an ingredients field with a many-to-many relationship. I have an intermediate Ingredient amount model associated with the ingredients field via through. I want to prohibit the creation of a recipe in django admin without ingredients. I'm trying to solve this problem by creating my own class inherited from BaseInlineFormSet and redefining the clean() method. It doesn't work out yet, I need help, what am I doing wrong?
admin.py
class IngredientsAmountInlineFormset(BaseInlineFormSet):
def clean_ingredients(self):
if len(self.cleaned_data['ingredients']) < 1:
return 'Укажите хотя бы один ингредиент в рецепте'
return self.cleaned_data['ingredients']
class IngredientsAmountInline(admin.TabularInline):
model = IngredientsAmount
formset = IngredientsAmountInlineFormset
extra = 0
#admin.register(Recipes)
class RecipesAdmin(admin.ModelAdmin):
list_display = ('name', 'author', 'favorites_count',)
list_filter = ('name', 'author', 'tags',)
search_fields = ('name', 'author', 'tags',)
empty_value_display = '-пусто-'
inlines = (IngredientsAmountInline,)
models.py
class Ingredients(models.Model):
name = models.CharField(max_length=200, unique=True)
measurement_unit = models.CharField(max_length=200)
...
class Recipes(models.Model):
...
ingredients = models.ManyToManyField(Ingredients,
through='IngredientsAmount',
related_name='recipes',
verbose_name='Ингредиенты',
)
...
class IngredientsAmount(models.Model):
ingredients = models.ForeignKey(Ingredients,
on_delete=models.CASCADE,
related_name='amount',
verbose_name='Ингредиенты',
)
recipes = models.ForeignKey(Recipes,
on_delete=models.CASCADE,
related_name='amount',
verbose_name='Рецепты', )
amount = models.IntegerField()

Answer 1

obiviously clean should raise ValidationException:
class IngredientsAmountInlineFormset(BaseInlineFormSet):
def clean_ingredients(self):
value = self.cleaned_data['ingredients']
if value:
return value
raise ValidationError(_('Укажите хотя бы один ингредиент в рецепте'))
by the way:
Try don't use the direct text message:
'Укажите хотя бы один ингредиент в рецепте'
Wrap your text in gettext/gettext_lazy, like this:
from django.utils.translation import gettext_lazy as _
_('Укажите хотя бы один ингредиент в рецепте')
It help you in future collect those messages together, and translate it if you need.