48 lines
1.7 KiB
Python
48 lines
1.7 KiB
Python
from django.template.base import Template, TemplateDoesNotExist
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class Loader(object):
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is_usable = False
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# Only used to raise a deprecation warning. Remove in Django 2.0.
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_accepts_engine_in_init = True
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def __init__(self, engine):
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self.engine = engine
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def __call__(self, template_name, template_dirs=None):
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return self.load_template(template_name, template_dirs)
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def load_template(self, template_name, template_dirs=None):
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source, display_name = self.load_template_source(
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template_name, template_dirs)
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origin = self.engine.make_origin(
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display_name, self.load_template_source,
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template_name, template_dirs)
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try:
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template = Template(source, origin, template_name, self.engine)
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except TemplateDoesNotExist:
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# If compiling the template we found raises TemplateDoesNotExist,
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# back off to returning the source and display name for the
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# template we were asked to load. This allows for correct
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# identification of the actual template that does not exist.
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return source, display_name
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else:
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return template, None
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def load_template_source(self, template_name, template_dirs=None):
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"""
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Returns a tuple containing the source and origin for the given
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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 "
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"a load_template_source() method")
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def reset(self):
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"""
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Resets 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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