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template overrides handling changed

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Alexander Pantyukhin 2015-03-30 10:49:55 +00:00 • committed by Markus Unterwaditzer
parent eae37b575d
commit 883f82f261
1 changed files with 6 additions and 5 deletions
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11
flask/templating.py
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@ -108,11 +108,12 @@ def _render(template, context, app):
brt_resp = before_render_template.send(app, template=template, context=context)
if len(brt_resp) == 1:
first_resp = brt_resp[0]
if len(first_resp) == 2 and first_resp[1] is not None:
return first_resp[1]
overrides = [rv for _, rv in brt_resp if rv is not None]
if len(overrides) == 1:
return overrides[0]
elif len(overrides) > 1:
raise RuntimeError('More than one before_render_template signal '
'returned data')
rv = template.render(context)
template_rendered.send(app, template=template, context=context)