仅使用jinja2而不使用Django的Django模板{{item.get_FOO_display}}

Question

I use Django. I also use standalone Jinja2 to build email body from django models.

I have model with choice field and I would like to get its display value from the model instance.

In django template, it is easy, for example:

{{ form.get_foo_display }}.

However, it does not work if is it outside of the django template. My code using jinja2 is:

Trip participation:\t{{ item.get_event_trip_display }}

where item is model instance and event_trip is choice field (the {{ item.event_trip }} works ok)

However the get_event_trip_display is rendered as:

Trip participation: <bound method curry.<locals>._curried of <Registration: John Doe>>

Known solutions:

1. Use {% if ... %} block to manually select the choice.

2. Append the instance with new attributes in Python code:

   item.trip_parictipation_display = item.get_trip_participation_display()

My question:

Is there simpler way hot to call the function directly in jinja2? (I have a lot of fields like that)

Answer 1

get_event_trip_display is a method. Django templates automatically call methods, but Jinja2 templates don't. You need to call it explicitly:

{{ item.get_event_trip_display() }}