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1 from django.utils.html import conditional_escape |
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2 from django.utils.encoding import smart_unicode, StrAndUnicode, force_unicode |
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3 from django.utils.safestring import mark_safe |
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4 |
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5 def flatatt(attrs): |
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6 """ |
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7 Convert a dictionary of attributes to a single string. |
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8 The returned string will contain a leading space followed by key="value", |
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9 XML-style pairs. It is assumed that the keys do not need to be XML-escaped. |
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10 If the passed dictionary is empty, then return an empty string. |
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11 """ |
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12 return u''.join([u' %s="%s"' % (k, conditional_escape(v)) for k, v in attrs.items()]) |
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13 |
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14 class ErrorDict(dict, StrAndUnicode): |
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15 """ |
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16 A collection of errors that knows how to display itself in various formats. |
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17 |
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18 The dictionary keys are the field names, and the values are the errors. |
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19 """ |
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20 def __unicode__(self): |
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21 return self.as_ul() |
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22 |
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23 def as_ul(self): |
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24 if not self: return u'' |
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25 return mark_safe(u'<ul class="errorlist">%s</ul>' |
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26 % ''.join([u'<li>%s%s</li>' % (k, force_unicode(v)) |
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27 for k, v in self.items()])) |
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28 |
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29 def as_text(self): |
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30 return u'\n'.join([u'* %s\n%s' % (k, u'\n'.join([u' * %s' % force_unicode(i) for i in v])) for k, v in self.items()]) |
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31 |
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32 class ErrorList(list, StrAndUnicode): |
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33 """ |
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34 A collection of errors that knows how to display itself in various formats. |
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35 """ |
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36 def __unicode__(self): |
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37 return self.as_ul() |
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38 |
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39 def as_ul(self): |
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40 if not self: return u'' |
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41 return mark_safe(u'<ul class="errorlist">%s</ul>' |
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42 % ''.join([u'<li>%s</li>' % conditional_escape(force_unicode(e)) for e in self])) |
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43 |
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44 def as_text(self): |
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45 if not self: return u'' |
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46 return u'\n'.join([u'* %s' % force_unicode(e) for e in self]) |
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47 |
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48 def __repr__(self): |
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49 return repr([force_unicode(e) for e in self]) |
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50 |
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51 class ValidationError(Exception): |
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52 def __init__(self, message): |
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53 """ |
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54 ValidationError can be passed any object that can be printed (usually |
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55 a string) or a list of objects. |
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56 """ |
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57 if isinstance(message, list): |
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58 self.messages = ErrorList([smart_unicode(msg) for msg in message]) |
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59 else: |
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60 message = smart_unicode(message) |
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61 self.messages = ErrorList([message]) |
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62 |
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63 def __str__(self): |
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64 # This is needed because, without a __str__(), printing an exception |
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65 # instance would result in this: |
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66 # AttributeError: ValidationError instance has no attribute 'args' |
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67 # See http://www.python.org/doc/current/tut/node10.html#handling |
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68 return repr(self.messages) |