Hi, I think you have a misconception in your model. What you need is a many to many relation so it does not matter how many metabolites each Reaction has. I am not so fimilar with Chemistry. So each stoichiometry belongs to exactly one metabolite?
if yes you could create an additional Model call it for example StoichiometryMetabolite which has three fields: stoichiometry = models.CharField(max_length=255, blank=True, null=True) metabolite = models.ForeignKey('Metabolites', on_delete=models.CASCADE) reaction = models.ForeignKey('Reactionsmeta', on_delete=models.CASCADE In your admin.py you have to create an InlineAdmin for StoichiometryMetabolite: class StoichiometryMetaboliteInline(admin.StackedInline): model = StoichiometryMetabolite extra = 6 Than you have to add it to your inlines in your Reactionsmeta admin inlines = [StoichiometryMetaboliteInline Everytime you have numbered columns in your model you should consider refactor it since it is not good database design. -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To post to this group, send email to django-users@googlegroups.com. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/463d4bef-6105-4175-94ab-afb23b79e313%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.