| 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]] |
|
|
