Could not parse the remainder: '(audio_only=True)'

Question

in my templates/videos.html,

<div class="grid grid-cols-3 gap-2">
    {% for vid in videos.streams.filter(audio_only=True) %}
        <a href="{{vid.url}}">{{vid.resolution}}</a>
    {% endfor %}
</div>

Error is,

Could not parse the remainder: '(audio_only=True)' from 'videos.streams.filter(audio_only=True)'

I can solve this when i pass all_videos = videos.streams.filter(audio_only=True) from my views.py as context, and in templates/videos.html i replace videos.streams.filter(audio_only=True) with all_videos,

but I want to know that is there any other method to solve this

Answer 1

but I want to know that is there any other method to solve this.

You could add an extra property/method with no parameters to the Video model and call that property to obtain the filtered queryset.

For example:

class Video(models.Model):
    # …
    
    @property
    def audio_streams(self):
        return self.streams.filter(audio_only=True)

and then thus use {% for video in videos.audio_streams %}. But regardless, the Django template language has been deliberately restricted to prevent people from writing this: a template should implement rendering logic, not business logic: business logic belongs in the models and the views. So the only clean solution is to filter in the view, not the template.