60 lines
2.3 KiB
Python
60 lines
2.3 KiB
Python
from django.utils.html import escape
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from django.utils.encoding import smart_unicode, StrAndUnicode
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def flatatt(attrs):
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"""
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Convert a dictionary of attributes to a single string.
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The returned string will contain a leading space followed by key="value",
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XML-style pairs. It is assumed that the keys do not need to be XML-escaped.
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If the passed dictionary is empty, then return an empty string.
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"""
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return u''.join([u' %s="%s"' % (k, escape(v)) for k, v in attrs.items()])
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class ErrorDict(dict, StrAndUnicode):
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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 __unicode__(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, smart_unicode(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' % smart_unicode(i) for i in v])) for k, v in self.items()])
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class ErrorList(list, StrAndUnicode):
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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 __unicode__(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>' % smart_unicode(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' % smart_unicode(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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