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67 lines
2.0 KiB
Python
67 lines
2.0 KiB
Python
5 years ago
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from . import engines
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from .exceptions import TemplateDoesNotExist
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def get_template(template_name, using=None):
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"""
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Load and return a template for the given name.
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Raise TemplateDoesNotExist if no such template exists.
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"""
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chain = []
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engines = _engine_list(using)
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for engine in engines:
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try:
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return engine.get_template(template_name)
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except TemplateDoesNotExist as e:
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chain.append(e)
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raise TemplateDoesNotExist(template_name, chain=chain)
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def select_template(template_name_list, using=None):
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"""
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Load and return a template for one of the given names.
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Try names in order and return the first template found.
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Raise TemplateDoesNotExist if no such template exists.
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"""
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if isinstance(template_name_list, str):
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raise TypeError(
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'select_template() takes an iterable of template names but got a '
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'string: %r. Use get_template() if you want to load a single '
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'template by name.' % template_name_list
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)
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chain = []
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engines = _engine_list(using)
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for template_name in template_name_list:
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for engine in engines:
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try:
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return engine.get_template(template_name)
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except TemplateDoesNotExist as e:
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chain.append(e)
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if template_name_list:
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raise TemplateDoesNotExist(', '.join(template_name_list), chain=chain)
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else:
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raise TemplateDoesNotExist("No template names provided")
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def render_to_string(template_name, context=None, request=None, using=None):
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"""
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Load a template and render it with a context. Return a string.
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template_name may be a string or a list of strings.
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"""
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if isinstance(template_name, (list, tuple)):
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template = select_template(template_name, using=using)
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else:
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template = get_template(template_name, using=using)
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return template.render(context, request)
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def _engine_list(using=None):
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return engines.all() if using is None else [engines[using]]
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