Add Last-Modified header

[jfinkels]

and possible ETag?

[jfinkels]

See also http://flask.pocoo.org/snippets/95/

[k-funk]

+1

[jfinkels]

I think this is out-of-scope for Flask-Restless, as it depends on how the user implements the last update time in the model. It can be implemented by a preprocessor, which could check the headers, the last-update time, the etag, etc., then raise a ProcessingException with the appropriate status code (e.g. 304 Not Modified). This may be valuable as an example or in the documentation, so I'm marking this as a documentation issue.

[TrilceAC]

Agree. I like what @jfinkels proposes because you don't have to modify your model or add a new field just because you want this common feature. Instead, considering that you have some timestamp field, you only have to follow a recipe.

Another way to do this, could be by somehow implementing a function, maybe a decorator, that given a model field, it generates the header info and the proper checker to check whether it has been modified or not. I like this approach too, because you offer the functionality, but you are free to choose which field (or even fields) are those that need to be checked before updating.