CODEWITHSUNDEEP
pythondjangodjango-admin
psj
psj

Reputation: 376

Do a certain backend operation on clicking Django Admin save button

In a library system, I have the Userbooks (refers to books issued by a user) object registered with Django Admin. And when Django Admin creates a Userbooks object and saves it, the Book object (refers to books in library, also registered with Django Admin) associated with that UserBook with a one_to_one relationship, needs to have its boolean field 'is_issued' to be set to true. How can I do this backend action when Admin clicks the 'save' button?

Upvotes: 0

Views: 1509

Answers (2)

Anshul Sharma
Anshul Sharma

Reputation: 347

In the question you specifically asked that this action should happen when the admin tries to save it from admin. The solution suggested by @pansul-bhatt does the same thing on Model save. Even the alternative(Handling pre-save signal) would do the same thing. So even if you save the model from anywhere else in the code you will set is_issued as True.

The better way to do it is to override the save_model on the UserbooksAdmin.

class UserBookAdmin(admin.ModelAdmin):
      def save_model(self, request, obj, form, change):
           obj.is_issued = True
           obj.save()

This should be enough to solve your problem. But there are other hooks available with Django Admin.

Upvotes: 1

Pansul Bhatt
Pansul Bhatt

Reputation: 394

My suggestion would be to either you use pre save signals or just override the save method to do whatever operation use want 

class ModelB(models.Model):
    def save(self):
        # add logic to change is_issue value to True
        super(ModelB, self).save()

Hope this helps.

Upvotes: 3

Related Questions