50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
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from django.template import Template, TemplateDoesNotExist
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class Loader:
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def __init__(self, engine):
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self.engine = engine
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def get_template(self, template_name, skip=None):
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"""
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Call self.get_template_sources() and return a Template object for
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the first template matching template_name. If skip is provided, ignore
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template origins in skip. This is used to avoid recursion during
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template extending.
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"""
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tried = []
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for origin in self.get_template_sources(template_name):
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if skip is not None and origin in skip:
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tried.append((origin, 'Skipped'))
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continue
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try:
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contents = self.get_contents(origin)
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except TemplateDoesNotExist:
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tried.append((origin, 'Source does not exist'))
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continue
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else:
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return Template(
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contents, origin, origin.template_name, self.engine,
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)
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raise TemplateDoesNotExist(template_name, tried=tried)
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def get_template_sources(self, template_name):
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"""
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An iterator that yields possible matching template paths for a
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template name.
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"""
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raise NotImplementedError(
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'subclasses of Loader must provide a get_template_sources() method'
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)
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def reset(self):
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"""
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Reset any state maintained by the loader instance (e.g. cached
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templates or cached loader modules).
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"""
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pass
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