I need to produce an id surrounded by braces ( for example "{1234}" ). With the django template language, braces are also used to start a variable substitution, so I have some trouble in obtaining what I want. I tried
{{{ id }}}
{{ '{'id'}' }}
{{ '{'+id+'}' }}
{ {{ id }} }
None of these methods work, except the last one, which unfortunately produces "{ 1234 }", not what I want. I currently have two solutions : either I pass an id variable already containing the {} (ugly) or I write a custom filter and then write {{ id|add_braces }} (I prefer it).
Before going this way, I prefer to ask if a better solution exists.
Using escaped values does not work. Even if I add {% autoescape off %}%7B{% endautoescape %} I don't get the开发者_运维问答 {, which is strange, but that's another problem.
Thanks
Edit: I wrote a quick filter. Pasting it here so someone else can use it as a template for writing a more complex one. To be put into python package application_path/templatetags/formatting.py
from django import template
from django.template.defaultfilters import stringfilter
register = template.Library()
@register.filter
@stringfilter
def add_braces(value):
return "{"+value+"}"
I think your answer can be found here:
http://docs.djangoproject.com/en/dev/ref/templates/builtins/#templatetag
In short, you want to use {% templatetag openbrace %}
and {% templatetag closebrace %}
.
Edit: Django now also includes this functionality out of the box:
{% verbatim %} {{ blah blah }} {% endverbatim %}
{% templatetag openbrace %}
become extremely verbose for e.g. javascript templates
I've used the verbatim
tag from this gist with some success for exactly this purpose which lets you do something like
{{ request.user }}
{% verbatim %}
brackets inside here are left alone, which is handy for e.g. jquery templates
{{ this will be left }}
{% so will this %}
{% endverbatim }}
{% more regular tags (to be replaced by the django template engine %}
The recommendation from the Jinja templating language works with the Django templating engine as well:
http://jinja.pocoo.org/docs/dev/templates/#escaping
The solution is this:
{{ '{' }}{{ id }}{{ '}' }}
Of course the other two answers work, but this is one is less verbose and more readable, in my opinion.
精彩评论