Is it possible, in a django template, to check if an object is contained in a list
- by AlexH
I'm very new to django, about a week into it.
I'm making a site where users enter stuff, then other users can vote on whether they like the stuff or not. I know it's not so novel, but it's a good project to learn a bunch of tools.
I have a many-to-many table for storing who likes or dislikes what. Before I render the page, I pull out all the likes and dislikes for the current user, along with the stuff I'm going to show on the page.
When I render the page, I go through the list of stuff I'm going to show and print them out one at a time. I want to show the user which stuff they liked, and which they didn't.
So in my django template, I have an object called entry. I also have two lists of objects called likes and dislikes. Is there any way to determine if entry is a member of either list, inside my django template.
I think what I'm looking for is a filter where I can say something like
{% if entry|in:likes %}
or
{% if likes|contains:entry %}
I know I could add a method to my model and check for each entry individually, but that seems like it would be database intensive.
Is there a better way to think about this problem?
