Created
November 12, 2013 02:36
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A template tag for Django templates which does not allow non-existent variable errors to fail silently.
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""" | |
A template tag for Django templates which does not allow | |
non-existent variable errors to fail silently. | |
Only works for simple lookups, where the variable is | |
a key in the context. | |
""" | |
from django import template | |
register = template.Library() | |
class NoisyNode(template.Node): | |
def __init__(self, variable_name): | |
self.variable_name = variable_name | |
def render(self, context): | |
# Attempt to look up the variable in the context. | |
# Raises KeyError if variable does not exist. | |
return context[self.variable_name] | |
@register.tag(name='noisy') | |
def noisy(parser, token): | |
try: | |
tag_name, variable_name = token.split_contents() | |
except ValueError: | |
raise template.TemplateSyntaxError( | |
"%r tag requires a single argument" % token.contents.split()[0]) | |
return NoisyNode(variable_name) |
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MIT LICENSE
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