if Tag | Django Template Tags and Filters

if Tag

Conditionals in Django templates work just like they do in Python. The syntax is:

{% if some_conditions %}
  Output this block.
{% elif other_conditions %}
  Output this block.
{% else %}
  Output this block.
{% endif %}

All of the Python comparison and logical operators are available:

== – Equals.
!= – Doesn’t equal.
> – Is greater than.
< – Is less than.
>= – Is greater than or equal to.
<= – Is less than or equal to.
is – Is the same object.
is not – Is not the same object.
in – Is in a sequence. *Note that the only types of sequences you can create in the template are lists of strings, which you do by comma-separating the values:
```
{% if animal in "elephant,giraffe,donkey" %}
```
Other sequences must be made available to the template from the view.

You must include spaces around the comparison operators.
```
{% if a == b or c > d %}
```
If you fail to include spaces, you will get a TemplateSyntaxError.
To check for the existence a URL parameter, use:
```
{% if request.GET.foo %}
```
This will return True if foo is passed on the querystring and has some value.

Did we get something wrong? Is there a use case for the if tag that we should add? Please let us know.

Official Documentation
This page last updated on Oct. 30, 2022, 1:22 p.m. EST