0 vs None: 0 should still be inside my if-call

Question

I write in my template: {% if ticket_price.discounted_price %}. Now that works perfect, until ticket_price.discounted_price = 0. As 0 can happen (original price = 10, discount = 10 > discounted_price = 0) if want to include this option.

However, it seems if ticket_price.discounted_price 'thinks' 0 is equal to None. How would you solve that?

score 2 · Answer 1 · answered Nov 27 '18 at 14:57

2

You can check explicitly for None {% if ticket_price.discounted_price is None %} see this post for more details not None test in Python

answered Nov 27 '18 at 14:57

Hotpepper

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That's perfect `{% if ticket_price.discounted_price is not None %}`solved it! – Joey Coder Nov 27 '18 at 14:59

WinterMute · Answer 2 · 2018-11-27T15:17:36.253

1

"if" tests for truthiness in Python. If you want to explicitly check for None:

{% if ticket_price.discounted_price == None %}

See also: What is the equivalent of "none" in django templates?

edited Nov 27 '18 at 15:17

answered Nov 27 '18 at 14:57

WinterMute

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Perfect, thank you for the help. `{% if ticket_price.discounted_price is not None %}` was the solution. – Joey Coder Nov 27 '18 at 14:59

0 vs None: 0 should still be inside my if-call

2 Answers2