CODEWITHSUNDEEP
pythondjango
Lucas Ou-Yang
Lucas Ou-Yang

Reputation: 5655

How to send django models into a template with additional custom fields?

I faintly remember seeing this done before in tutorials in the past. However, im having trouble finding out exactly how in the docs currently.

Suppose we had a model called Post. This model has a field called timestamp. However, when we send this model into the template we don't care about timestamps. Instead, we want the more popular "age" (created X mins/hrs ago), which thankfully, can be deduced from the timestamp.

Instead of creating a whole new field for timestamp, and instead of using custom template tags, can we somehow add a field to a model temporarily before sending it over to our template?

Ex.

# views.py
# Is the below code right? do I need to save()?
posts = Posts.objects.filter(...).filter(...)[:X]
for post in posts:
     # Post does not have an age field, we are creating one
     # temporarily before sending it to the template
     post.age = some_function(post.timestamp) 

return render_to_response(template, {'posts' : posts}, etc...)

Thank you.

Upvotes: 2

Views: 92

Answers (1)

Ignacio Vazquez-Abrams
Ignacio Vazquez-Abrams

Reputation: 798754

Just make it a property on the model.

class Post(Model)
  @property
  def age(self):
    return now() - self.timestamp

Upvotes: 6

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