71 lines
2.1 KiB
Python
71 lines
2.1 KiB
Python
from django.utils import six
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from django.utils.deprecation import (
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DeprecationInstanceCheck, RemovedInDjango20Warning,
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)
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from . import engines
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from .base import Origin
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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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Loads and returns a template for the given name.
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Raises 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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Loads and returns a template for one of the given names.
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Tries names in order and returns the first template found.
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Raises 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 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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Loads a template and renders it with a context. Returns 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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class LoaderOrigin(six.with_metaclass(DeprecationInstanceCheck, Origin)):
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alternative = 'django.template.Origin'
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deprecation_warning = RemovedInDjango20Warning
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