72 lines
2.5 KiB
Python
72 lines
2.5 KiB
Python
from django.conf import settings
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from django.utils.html import escape
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# Converts a dictionary to a single string with key="value", XML-style with
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# a leading space. Assumes keys do not need to be XML-escaped.
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flatatt = lambda attrs: u''.join([u' %s="%s"' % (k, escape(v)) for k, v in attrs.items()])
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def smart_unicode(s):
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if not isinstance(s, basestring):
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s = unicode(str(s))
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elif not isinstance(s, unicode):
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s = unicode(s, settings.DEFAULT_CHARSET)
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return s
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class StrAndUnicode(object):
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"""
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A class whose __str__ returns its __unicode__ as a bytestring
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according to settings.DEFAULT_CHARSET.
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Useful as a mix-in.
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"""
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def __str__(self):
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return self.__unicode__().encode(settings.DEFAULT_CHARSET)
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class ErrorDict(dict):
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"""
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A collection of errors that knows how to display itself in various formats.
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The dictionary keys are the field names, and the values are the errors.
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"""
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def __str__(self):
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return self.as_ul()
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def as_ul(self):
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if not self: return u''
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return u'<ul class="errorlist">%s</ul>' % ''.join([u'<li>%s%s</li>' % (k, v) for k, v in self.items()])
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def as_text(self):
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return u'\n'.join([u'* %s\n%s' % (k, u'\n'.join([u' * %s' % i for i in v])) for k, v in self.items()])
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class ErrorList(list):
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"""
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A collection of errors that knows how to display itself in various formats.
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"""
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def __str__(self):
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return self.as_ul()
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def as_ul(self):
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if not self: return u''
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return u'<ul class="errorlist">%s</ul>' % ''.join([u'<li>%s</li>' % e for e in self])
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def as_text(self):
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if not self: return u''
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return u'\n'.join([u'* %s' % e for e in self])
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class ValidationError(Exception):
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def __init__(self, message):
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"ValidationError can be passed a string or a list."
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if isinstance(message, list):
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self.messages = ErrorList([smart_unicode(msg) for msg in message])
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else:
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assert isinstance(message, basestring), ("%s should be a basestring" % repr(message))
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message = smart_unicode(message)
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self.messages = ErrorList([message])
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def __str__(self):
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# This is needed because, without a __str__(), printing an exception
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# instance would result in this:
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# AttributeError: ValidationError instance has no attribute 'args'
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# See http://www.python.org/doc/current/tut/node10.html#handling
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return repr(self.messages)
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