CODEWITHSUNDEEP
pythondjango
Skrudox
Skrudox

Reputation: 939

python django OR condition

I have this code:

{{ object.subtotal }}

I want to print 0 in case if object.subtotal is empty or false:

I've tried like this:

{{ object.subtotal or 0 }}

but I've got a server error 500

Upvotes: 1

Views: 77

Answers (2)

willeM_ Van Onsem
willeM_ Van Onsem

Reputation: 476557

You can, as far as I know, not use such operators as a Django template "variable". But what you can do to replace the None, is use the default_if_none template filter:

{{ object.subtotal|default_if_none:0 }}

This will thus only get "triggered" in case the subtotal is None (not another expression with truthiness False, this thus is semantically a bit different than the Python or, that evaluates to the second expression in case the first expression has truthiness False).

Furthermore this is probably better implemented at the model level, and not at the template level. Templates are used to determine how something should be rendered, not what should be rendered (semantics).

Upvotes: 2

neverwalkaloner
neverwalkaloner

Reputation: 47354

You can use default filter:

{{ object.subtotal|default:0 }}

Upvotes: 5

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