Suppress "None" output as string in Jinja2

python jinja2
Spaceghost picture Spaceghost · Jun 21, 2012 · Viewed 29.8k times · Source

How do I persuade Jinja2 to not print "None" when the value is None?

I have a number of entries in a dictionary and I would like to output everything in a single loop instead of having special cases for different keywords. If I have a value of None (the NoneType not the string) then the string "None" is inserted into the template rendering results.

Trying to suppress it using {{ value or '' }} works too well as it will replace the numeric value zero as well.

Do I need to filter the dictionary before passing it to Jinja2 for rendering?

Answer

Joran Beasley picture Joran Beasley · Jun 21, 2012

In new versions of Jinja2 (2.9+):

{{ value if value }}

In older versions of Jinja2 (prior to 2.9):

{{ value if value is not none }} works great.

if this raises an error about not having an else try using an else ..

{{ value if value is not none else '' }}

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