114 lines
3.5 KiB
Python
114 lines
3.5 KiB
Python
from django.contrib.messages import constants
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from django.contrib.messages.storage import default_storage
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from django.utils.functional import lazy, memoize
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__all__ = (
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'add_message', 'get_messages',
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'debug', 'info', 'success', 'warning', 'error',
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)
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class MessageFailure(Exception):
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pass
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def add_message(request, level, message, extra_tags='', fail_silently=False):
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"""
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Attempts to add a message to the request using the 'messages' app, falling
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back to the user's message_set if MessageMiddleware hasn't been enabled.
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"""
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if hasattr(request, '_messages'):
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return request._messages.add(level, message, extra_tags)
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if hasattr(request, 'user') and request.user.is_authenticated():
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return request.user.message_set.create(message=message)
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if not fail_silently:
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raise MessageFailure('Without the django.contrib.messages '
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'middleware, messages can only be added to '
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'authenticated users.')
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def get_messages(request):
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"""
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Returns the message storage on the request if it exists, otherwise returns
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user.message_set.all() as the old auth context processor did.
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"""
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if hasattr(request, '_messages'):
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return request._messages
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def get_user():
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if hasattr(request, 'user'):
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return request.user
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else:
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from django.contrib.auth.models import AnonymousUser
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return AnonymousUser()
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return lazy(memoize(get_user().get_and_delete_messages, {}, 0), list)()
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def get_level(request):
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"""
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Returns the minimum level of messages to be recorded.
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The default level is the ``MESSAGE_LEVEL`` setting. If this is not found,
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the ``INFO`` level is used.
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"""
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if hasattr(request, '_messages'):
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storage = request._messages
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else:
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storage = default_storage(request)
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return storage.level
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def set_level(request, level):
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"""
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Sets the minimum level of messages to be recorded, returning ``True`` if
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the level was recorded successfully.
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If set to ``None``, the default level will be used (see the ``get_level``
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method).
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"""
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if not hasattr(request, '_messages'):
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return False
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request._messages.level = level
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return True
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def debug(request, message, extra_tags='', fail_silently=False):
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"""
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Adds a message with the ``DEBUG`` level.
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"""
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add_message(request, constants.DEBUG, message, extra_tags=extra_tags,
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fail_silently=fail_silently)
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def info(request, message, extra_tags='', fail_silently=False):
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"""
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Adds a message with the ``INFO`` level.
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"""
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add_message(request, constants.INFO, message, extra_tags=extra_tags,
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fail_silently=fail_silently)
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def success(request, message, extra_tags='', fail_silently=False):
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"""
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Adds a message with the ``SUCCESS`` level.
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"""
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add_message(request, constants.SUCCESS, message, extra_tags=extra_tags,
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fail_silently=fail_silently)
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def warning(request, message, extra_tags='', fail_silently=False):
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"""
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Adds a message with the ``WARNING`` level.
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"""
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add_message(request, constants.WARNING, message, extra_tags=extra_tags,
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fail_silently=fail_silently)
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def error(request, message, extra_tags='', fail_silently=False):
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"""
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Adds a message with the ``ERROR`` level.
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"""
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add_message(request, constants.ERROR, message, extra_tags=extra_tags,
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fail_silently=fail_silently)
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