65 lines
2.3 KiB
Python
65 lines
2.3 KiB
Python
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from django.db import models
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from django.utils.text import capfirst
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from django.core import exceptions
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from multiselectfield import MultiSelectFormField
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class MultiSelectField(models.Field):
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""" Choice values can not contain commas. """
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__metaclass__ = models.SubfieldBase
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def get_internal_type(self):
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return "CharField"
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def get_choices_default(self):
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return self.get_choices(include_blank=False)
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def get_choices_selected(self, arr_choices=''):
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if not arr_choices:
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return False
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list = []
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for choice_selected in arr_choices:
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list.append(choice_selected[0])
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return list
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def _get_FIELD_display(self, field):
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value = getattr(self, field.attname)
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choicedict = dict(field.choices)
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def value_to_string(self, obj):
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value = self._get_val_from_obj(obj)
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return self.get_db_prep_value(value)
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def validate(self, value, model_instance):
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arr_choices = self.get_choices_selected(self.get_choices_default())
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for opt_select in value:
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if (opt_select not in arr_choices):
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raise exceptions.ValidationError(self.error_messages['invalid_choice'] % value)
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return
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def formfield(self, **kwargs):
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defaults = {'required': not self.blank, 'label': capfirst(self.verbose_name),
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'help_text': self.help_text, 'choices': self.choices}
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if self.has_default():
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defaults['initial'] = self.get_default()
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defaults.update(kwargs)
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return MultiSelectFormField(**defaults)
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def get_db_prep_value(self, value, connection, prepared=False):
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if isinstance(value, basestring):
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return value
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elif isinstance(value, list):
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return ",".join(value)
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def to_python(self, value):
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if value is not None:
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return value if isinstance(value, list) else value.split(',')
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return ''
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def contribute_to_class(self, cls, name):
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super(MultiSelectField, self).contribute_to_class(cls, name)
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if self.choices:
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func = lambda self, fieldname = name, choicedict = dict(self.choices): ",".join([choicedict.get(value, value) for value in getattr(self, fieldname)])
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setattr(cls, 'get_%s_display' % self.name, func)
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