Python django.template.context 模块，_current_app_undefined() 实例源码

def __init__(self, request, template, context=None, content_type=None,
            status=None, current_app=_current_app_undefined, charset=None,
            using=None):
        # As a convenience we'll allow callers to provide current_app without
        # having to avoid needing to create the RequestContext directly
        if current_app is not _current_app_undefined:
            warnings.warn(
                "The current_app argument of TemplateResponse is deprecated. "
                "Set the current_app attribute of its request instead.",
                RemovedInDjango20Warning, stacklevel=2)
            request.current_app = current_app
        super(TemplateResponse, self).__init__(
            template, context, content_type, status, charset, using)
        self._request = request

def render(request, template_name, context=None,
           context_instance=_context_instance_undefined,
           content_type=None, status=None, current_app=_current_app_undefined,
           dirs=_dirs_undefined, dictionary=_dictionary_undefined,
           using=None):
    """
    Returns a HttpResponse whose content is filled with the result of calling
    django.template.loader.render_to_string() with the passed arguments.
    Uses a RequestContext by default.
    """
    if (context_instance is _context_instance_undefined
            and current_app is _current_app_undefined
            and dirs is _dirs_undefined
            and dictionary is _dictionary_undefined):
        # No deprecated arguments were passed - use the new code path
        # In Django 1.10, request should become a positional argument.
        content = loader.render_to_string(
            template_name, context, request=request, using=using)

    else:
        # Some deprecated arguments were passed - use the legacy code path
        if context_instance is not _context_instance_undefined:
            if current_app is not _current_app_undefined:
                raise ValueError('If you provide a context_instance you must '
                                 'set its current_app before calling render()')
        else:
            context_instance = RequestContext(request)
            if current_app is not _current_app_undefined:
                warnings.warn(
                    "The current_app argument of render is deprecated. "
                    "Set the current_app attribute of request instead.",
                    RemovedInDjango110Warning, stacklevel=2)
                request.current_app = current_app
                # Directly set the private attribute to avoid triggering the
                # warning in RequestContext.__init__.
                context_instance._current_app = current_app

        content = loader.render_to_string(
            template_name, context, context_instance, dirs, dictionary,
            using=using)

    return HttpResponse(content, content_type, status)

def render(request, template_name, context=None,
           context_instance=_context_instance_undefined,
           content_type=None, status=None, current_app=_current_app_undefined,
           dirs=_dirs_undefined, dictionary=_dictionary_undefined,
           using=None):
    """
    Returns a HttpResponse whose content is filled with the result of calling
    django.template.loader.render_to_string() with the passed arguments.
    Uses a RequestContext by default.
    """
    if (context_instance is _context_instance_undefined
            and current_app is _current_app_undefined
            and dirs is _dirs_undefined
            and dictionary is _dictionary_undefined):
        # No deprecated arguments were passed - use the new code path
        # In Django 2.0, request should become a positional argument.
        content = loader.render_to_string(
            template_name, context, request=request, using=using)

    else:
        # Some deprecated arguments were passed - use the legacy code path
        if context_instance is not _context_instance_undefined:
            if current_app is not _current_app_undefined:
                raise ValueError('If you provide a context_instance you must '
                                 'set its current_app before calling render()')
        else:
            context_instance = RequestContext(request)
            if current_app is not _current_app_undefined:
                warnings.warn(
                    "The current_app argument of render is deprecated. "
                    "Set the current_app attribute of request instead.",
                    RemovedInDjango20Warning, stacklevel=2)
                request.current_app = current_app
                # Directly set the private attribute to avoid triggering the
                # warning in RequestContext.__init__.
                context_instance._current_app = current_app

        content = loader.render_to_string(
            template_name, context, context_instance, dirs, dictionary,
            using=using)

    return HttpResponse(content, content_type, status)

def render(request, template_name, context=None,
           context_instance=_context_instance_undefined,
           content_type=None, status=None, current_app=_current_app_undefined,
           dirs=_dirs_undefined, dictionary=_dictionary_undefined,
           using=None):
    """
    Returns a HttpResponse whose content is filled with the result of calling
    django.template.loader.render_to_string() with the passed arguments.
    Uses a RequestContext by default.
    """
    if (context_instance is _context_instance_undefined
            and current_app is _current_app_undefined
            and dirs is _dirs_undefined
            and dictionary is _dictionary_undefined):
        # No deprecated arguments were passed - use the new code path
        # In Django 2.0, request should become a positional argument.
        content = loader.render_to_string(
            template_name, context, request=request, using=using)

    else:
        # Some deprecated arguments were passed - use the legacy code path
        if context_instance is not _context_instance_undefined:
            if current_app is not _current_app_undefined:
                raise ValueError('If you provide a context_instance you must '
                                 'set its current_app before calling render()')
        else:
            context_instance = RequestContext(request)
            if current_app is not _current_app_undefined:
                warnings.warn(
                    "The current_app argument of render is deprecated. "
                    "Set the current_app attribute of request instead.",
                    RemovedInDjango20Warning, stacklevel=2)
                request.current_app = current_app
                # Directly set the private attribute to avoid triggering the
                # warning in RequestContext.__init__.
                context_instance._current_app = current_app

        content = loader.render_to_string(
            template_name, context, context_instance, dirs, dictionary,
            using=using)

    return HttpResponse(content, content_type, status)

def render(request, template_name, context=None,
           context_instance=_context_instance_undefined,
           content_type=None, status=None, current_app=_current_app_undefined,
           dirs=_dirs_undefined, dictionary=_dictionary_undefined,
           using=None):
    """
    Returns a HttpResponse whose content is filled with the result of calling
    django.template.loader.render_to_string() with the passed arguments.
    Uses a RequestContext by default.
    """
    if (context_instance is _context_instance_undefined
            and current_app is _current_app_undefined
            and dirs is _dirs_undefined
            and dictionary is _dictionary_undefined):
        # No deprecated arguments were passed - use the new code path
        # In Django 2.0, request should become a positional argument.
        content = loader.render_to_string(
            template_name, context, request=request, using=using)

    else:
        # Some deprecated arguments were passed - use the legacy code path
        if context_instance is not _context_instance_undefined:
            if current_app is not _current_app_undefined:
                raise ValueError('If you provide a context_instance you must '
                                 'set its current_app before calling render()')
        else:
            context_instance = RequestContext(request)
            if current_app is not _current_app_undefined:
                warnings.warn(
                    "The current_app argument of render is deprecated. "
                    "Set the current_app attribute of request instead.",
                    RemovedInDjango20Warning, stacklevel=2)
                request.current_app = current_app
                # Directly set the private attribute to avoid triggering the
                # warning in RequestContext.__init__.
                context_instance._current_app = current_app

        content = loader.render_to_string(
            template_name, context, context_instance, dirs, dictionary,
            using=using)

    return HttpResponse(content, content_type, status)

def render(request, template_name, context=None,
           context_instance=_context_instance_undefined,
           content_type=None, status=None, current_app=_current_app_undefined,
           dirs=_dirs_undefined, dictionary=_dictionary_undefined,
           using=None):
    """
    Returns a HttpResponse whose content is filled with the result of calling
    django.template.loader.render_to_string() with the passed arguments.
    Uses a RequestContext by default.
    """
    if (context_instance is _context_instance_undefined
            and current_app is _current_app_undefined
            and dirs is _dirs_undefined
            and dictionary is _dictionary_undefined):
        # No deprecated arguments were passed - use the new code path
        # In Django 1.10, request should become a positional argument.
        content = loader.render_to_string(
            template_name, context, request=request, using=using)

    else:
        # Some deprecated arguments were passed - use the legacy code path
        if context_instance is not _context_instance_undefined:
            if current_app is not _current_app_undefined:
                raise ValueError('If you provide a context_instance you must '
                                 'set its current_app before calling render()')
        else:
            context_instance = RequestContext(request)
            if current_app is not _current_app_undefined:
                warnings.warn(
                    "The current_app argument of render is deprecated. "
                    "Set the current_app attribute of request instead.",
                    RemovedInDjango110Warning, stacklevel=2)
                request.current_app = current_app
                # Directly set the private attribute to avoid triggering the
                # warning in RequestContext.__init__.
                context_instance._current_app = current_app

        content = loader.render_to_string(
            template_name, context, context_instance, dirs, dictionary,
            using=using)

    return HttpResponse(content, content_type, status)

def render(request, template_name, context=None,
           context_instance=_context_instance_undefined,
           content_type=None, status=None, current_app=_current_app_undefined,
           dirs=_dirs_undefined, dictionary=_dictionary_undefined,
           using=None):
    """
    Returns a HttpResponse whose content is filled with the result of calling
    django.template.loader.render_to_string() with the passed arguments.
    Uses a RequestContext by default.
    """
    if (context_instance is _context_instance_undefined
            and current_app is _current_app_undefined
            and dirs is _dirs_undefined
            and dictionary is _dictionary_undefined):
        # No deprecated arguments were passed - use the new code path
        # In Django 1.10, request should become a positional argument.
        content = loader.render_to_string(
            template_name, context, request=request, using=using)

    else:
        # Some deprecated arguments were passed - use the legacy code path
        if context_instance is not _context_instance_undefined:
            if current_app is not _current_app_undefined:
                raise ValueError('If you provide a context_instance you must '
                                 'set its current_app before calling render()')
        else:
            context_instance = RequestContext(request)
            if current_app is not _current_app_undefined:
                warnings.warn(
                    "The current_app argument of render is deprecated. "
                    "Set the current_app attribute of request instead.",
                    RemovedInDjango110Warning, stacklevel=2)
                request.current_app = current_app
                # Directly set the private attribute to avoid triggering the
                # warning in RequestContext.__init__.
                context_instance._current_app = current_app

        content = loader.render_to_string(
            template_name, context, context_instance, dirs, dictionary,
            using=using)

    return HttpResponse(content, content_type, status)

def render(request, template_name, context=None,
           context_instance=_context_instance_undefined,
           content_type=None, status=None, current_app=_current_app_undefined,
           dirs=_dirs_undefined, dictionary=_dictionary_undefined,
           using=None):
    """
    Returns a HttpResponse whose content is filled with the result of calling
    django.template.loader.render_to_string() with the passed arguments.
    Uses a RequestContext by default.
    """
    if (context_instance is _context_instance_undefined
            and current_app is _current_app_undefined
            and dirs is _dirs_undefined
            and dictionary is _dictionary_undefined):
        # No deprecated arguments were passed - use the new code path
        # In Django 2.0, request should become a positional argument.
        content = loader.render_to_string(
            template_name, context, request=request, using=using)

    else:
        # Some deprecated arguments were passed - use the legacy code path
        if context_instance is not _context_instance_undefined:
            if current_app is not _current_app_undefined:
                raise ValueError('If you provide a context_instance you must '
                                 'set its current_app before calling render()')
        else:
            context_instance = RequestContext(request)
            if current_app is not _current_app_undefined:
                warnings.warn(
                    "The current_app argument of render is deprecated. "
                    "Set the current_app attribute of request instead.",
                    RemovedInDjango20Warning, stacklevel=2)
                request.current_app = current_app
                # Directly set the private attribute to avoid triggering the
                # warning in RequestContext.__init__.
                context_instance._current_app = current_app

        content = loader.render_to_string(
            template_name, context, context_instance, dirs, dictionary,
            using=using)

    return HttpResponse(content, content_type, status)