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22 lines
744 B
22 lines
744 B
class KeepContext:
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"""
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Context manager that receives a `django.template.Context` instance and a list of keys
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Once the context manager is exited, it removes `keys` from the context, to avoid
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side effects in later layout objects that may use the same context variables.
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Layout objects should use `extra_context` to introduce context variables, never
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touch context object themselves, that could introduce side effects.
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"""
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def __init__(self, context, keys):
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self.context = context
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self.keys = keys
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def __enter__(self):
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pass
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def __exit__(self, type, value, traceback):
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for key in list(self.keys):
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if key in self.context:
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del self.context[key]
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