#23356: Unable to create template tag which behaves similar to {% verbatim %}
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Reporter: jrief | Owner: nobody
Type: Uncategorized | Status: closed
Component: Template system | Version: master
Severity: Normal | Resolution: wontfix
Keywords: verbatim | Triage Stage: Unreviewed
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Description changed by shayneoneill:
Old description:
> Currently it is impossible to create custom template tags which behave
> similar to {{{ {% verbatim %} }}}.
> The reason is in {{{Lexer.create_token()}}}. There, the class member
> {{{self.verbatim}}} is set for template blocks in "verbatim" state. It is
> impossible to turn on that state from outside, ie. a template tag.
>
> Fixing this, would be as simple as changing {{{if block_content[:9] in
> ('verbatim', 'verbatim ')}}} to {{{if
> block_content.startswith('verbatim')}}} or to {{{if block_content[:9] in
> ('verbatim', 'verbatim ', 'verbatim_')}}}.
> Then all template tags beginning with verbatim..., would start in
> "verbatim" state. I don't assume this will break any existing code; who
> starts the name of a templatetag with 'verbatim...' if not for that
> purpose?
>
> Background information why this is useful:
> Templates syntax for Django and AngularJS is very similar, and with some
> caveats it is possible to reuse a Django template for rendering in
> AngularJS. I therefore attempted to add a context sensitive variation of
> the verbatim tag to this app https://github.com/jrief/django-angular, but
> was hindered by this issue.
>
> BTW: This part of the Django code did not change from 1.6 up to master.
>
> For the purposes of anyone coming across this ticket and pulling their
> hair out over it, heres a template tag that might ease the pain;-
> {{{
>
> from django import template
>
> register = template.Library()
>
> @register.filter(name='specialbracket')
> def specialbracket(value):
> if value == 'left':
> return "{{"
> elif value == 'right':
> return "}}"
> else:
> return "??"
> }}}
>
> And the above example solved with this tag;-
>
> {{{
> <td class="field-{{ident}}">{{ 'left'|specialbracket }}
> computer.{{field}} {{ 'right'|specialbracket }} </td>
>
> }}}
New description:
Currently it is impossible to create custom template tags which behave
similar to {{{ {% verbatim %} }}}.
The reason is in {{{Lexer.create_token()}}}. There, the class member
{{{self.verbatim}}} is set for template blocks in "verbatim" state. It is
impossible to turn on that state from outside, ie. a template tag.
Fixing this, would be as simple as changing {{{if block_content[:9] in
('verbatim', 'verbatim ')}}} to {{{if
block_content.startswith('verbatim')}}} or to {{{if block_content[:9] in
('verbatim', 'verbatim ', 'verbatim_')}}}.
Then all template tags beginning with verbatim..., would start in
"verbatim" state. I don't assume this will break any existing code; who
starts the name of a templatetag with 'verbatim...' if not for that
purpose?
Background information why this is useful:
Templates syntax for Django and AngularJS is very similar, and with some
caveats it is possible to reuse a Django template for rendering in
AngularJS. I therefore attempted to add a context sensitive variation of
the verbatim tag to this app https://github.com/jrief/django-angular, but
was hindered by this issue.
BTW: This part of the Django code did not change from 1.6 up to master.
--
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Ticket URL: <https://code.djangoproject.com/ticket/23356#comment:3>
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