Source code for django.contrib.messages.api

from django.contrib.messages import constants
from django.contrib.messages.storage import default_storage

__all__ = (
    'add_message', 'get_messages',
    'get_level', 'set_level',
    'debug', 'info', 'success', 'warning', 'error',
    'MessageFailure',
)


class MessageFailure(Exception):
    pass


[docs]def add_message(request, level, message, extra_tags='', fail_silently=False): """ Attempts to add a message to the request using the 'messages' app. """ try: messages = request._messages except AttributeError: if not hasattr(request, 'META'): raise TypeError( "add_message() argument must be an HttpRequest object, not " "'%s'." % request.__class__.__name__ ) if not fail_silently: raise MessageFailure( 'You cannot add messages without installing ' 'django.contrib.messages.middleware.MessageMiddleware' ) else:
return messages.add(level, message, extra_tags)
[docs]def get_messages(request): """ Returns the message storage on the request if it exists, otherwise returns an empty list. """
return getattr(request, '_messages', []) def get_level(request): """ Returns the minimum level of messages to be recorded. The default level is the ``MESSAGE_LEVEL`` setting. If this is not found, the ``INFO`` level is used. """ storage = getattr(request, '_messages', default_storage(request)) return storage.level def set_level(request, level): """ Sets the minimum level of messages to be recorded, returning ``True`` if the level was recorded successfully. If set to ``None``, the default level will be used (see the ``get_level`` method). """ if not hasattr(request, '_messages'): return False request._messages.level = level return True def debug(request, message, extra_tags='', fail_silently=False): """ Adds a message with the ``DEBUG`` level. """ add_message(request, constants.DEBUG, message, extra_tags=extra_tags, fail_silently=fail_silently) def info(request, message, extra_tags='', fail_silently=False): """ Adds a message with the ``INFO`` level. """ add_message(request, constants.INFO, message, extra_tags=extra_tags, fail_silently=fail_silently) def success(request, message, extra_tags='', fail_silently=False): """ Adds a message with the ``SUCCESS`` level. """ add_message(request, constants.SUCCESS, message, extra_tags=extra_tags, fail_silently=fail_silently) def warning(request, message, extra_tags='', fail_silently=False): """ Adds a message with the ``WARNING`` level. """ add_message(request, constants.WARNING, message, extra_tags=extra_tags, fail_silently=fail_silently) def error(request, message, extra_tags='', fail_silently=False): """ Adds a message with the ``ERROR`` level. """ add_message(request, constants.ERROR, message, extra_tags=extra_tags, fail_silently=fail_silently)
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