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