59 lines
2.2 KiB
Python
59 lines
2.2 KiB
Python
|
from django.db import models
|
||
|
|
from django import forms
|
||
|
|
from django.utils.text import capfirst
|
||
|
|
|
||
|
|
class MultiSelectFormField(forms.MultipleChoiceField):
|
||
|
|
widget = forms.CheckboxSelectMultiple
|
||
|
|
|
||
|
|
def __init__(self, *args, **kwargs):
|
||
|
|
self.max_choices = kwargs.pop('max_choices', 0)
|
||
|
|
super(MultiSelectFormField, self).__init__(*args, **kwargs)
|
||
|
|
|
||
|
|
def clean(self, value):
|
||
|
|
if not value and self.required:
|
||
|
|
raise forms.ValidationError(self.error_messages['required'])
|
||
|
|
if value and self.max_choices and len(value) > self.max_choices:
|
||
|
|
raise forms.ValidationError('You must select a maximum of %s choice%s.'
|
||
|
|
% (apnumber(self.max_choices), pluralize(self.max_choices)))
|
||
|
|
return value
|
||
|
|
|
||
|
|
class MultiSelectField(models.Field):
|
||
|
|
__metaclass__ = models.SubfieldBase
|
||
|
|
|
||
|
|
def get_internal_type(self):
|
||
|
|
return "CharField"
|
||
|
|
|
||
|
|
def get_choices_default(self):
|
||
|
|
return self.get_choices(include_blank=False)
|
||
|
|
|
||
|
|
def _get_FIELD_display(self, field):
|
||
|
|
value = getattr(self, field.attname)
|
||
|
|
choicedict = dict(field.choices)
|
||
|
|
|
||
|
|
def formfield(self, **kwargs):
|
||
|
|
# don't call super, as that overrides default widget if it has choices
|
||
|
|
defaults = {'required': not self.blank, 'label': capfirst(self.verbose_name),
|
||
|
|
'help_text': self.help_text, 'choices':self.choices}
|
||
|
|
if self.has_default():
|
||
|
|
defaults['initial'] = self.get_default()
|
||
|
|
defaults.update(kwargs)
|
||
|
|
return MultiSelectFormField(**defaults)
|
||
|
|
|
||
|
|
def get_db_prep_value(self, value):
|
||
|
|
if isinstance(value, basestring):
|
||
|
|
return value
|
||
|
|
elif isinstance(value, list):
|
||
|
|
return ",".join(value)
|
||
|
|
|
||
|
|
def to_python(self, value):
|
||
|
|
if isinstance(value, list):
|
||
|
|
return value
|
||
|
|
return value.split(",")
|
||
|
|
|
||
|
|
def contribute_to_class(self, cls, name):
|
||
|
|
super(MultiSelectField, self).contribute_to_class(cls, name)
|
||
|
|
if self.choices:
|
||
|
|
func = lambda self, fieldname = name, choicedict = dict(self.choices):",".join([choicedict.get(value,value) for value in getattr(self,fieldname)])
|
||
|
|
setattr(cls, 'get_%s_display' % self.name, func)
|
||
|
|
|