How to integrate @etag(etag_func) decorator for a view

[Gabor Cristian]

Hello, 

I am currently developing a system to block users from updating a form data in case another user is also updating the same data at the same time. 

My application uses REST API's with DRF and I choose to use django-rest-framework-condition with the Etag decorator in order to have an optimistic locking approach.

What I understand is that the Etag is an identifier for a specific version of a resource 

Let's say I have the following model

class Blog(models.Model): 

     name = models.CharField(max_length=100) 

     tagline = models.TextField()

So let's say in my view I want to return all entries from blog model

blog = Blog.objects.all()

Doesn't that mean that the  Etag function should consider the value in blog variable when creating the identifier ? 

From what I see, the django condition function assigns value to res_etag variable at the receiving of the HttpRequest before I can do any data query from database.

I do not quite understand how this can help me know if the entries from Blog have been modified by another user.

Could someone explain this mechanism ?

Thanks,

Cristian 

[Kelechi Divine]

Cristian this was helpful and am really grateful!

I'm also a python programmer and I'd like you to put me through Django. 

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