jinja2 None gets printed

[kevin]

if a variable is None, the text 'None' gets output/printed in the html. is possible to have empty string instead of 'None'?
thanks

[Armin Ronacher]

Hi,

Yes, you can override the finalize method or patch it on the environment:

def silent_none(value):
if value is None:
return ''
return value

from jinja2 import Environment
env = Environment()
env.finalize = silent_none

I however recommend being explicit instead of a finalizer:

{{ variable or '' }}

Regards,
Armin

[kevin]

On Sun, Sep 19, 2010 at 9:30 AM, Armin Ronacher <armin.r...@active-4.com> wrote:

Hi,

On 2010-09-19 2:21 AM, kevin wrote:

if a variable is None, the text 'None' gets output/printed in the html.
is possible to have empty string instead of 'None'?
thanks

Yes, you can override the finalize method or patch it on the environment:


def silent_none(value):
   if value is None:
       return ''
   return value

from jinja2 import Environment
env = Environment()
env.finalize = silent_none

thanks for the info
 

I however recommend being explicit instead of a finalizer:

 {{ variable or '' }}

this seems easier and better, i did not know i could do this in jinja2
jinja2 rocks, thanks