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105 lines
3.7 KiB
Python
105 lines
3.7 KiB
Python
import sys
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import django
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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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if sys.version_info[0] == 2:
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string_type = unicode
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else:
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string_type = str
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# Code from six egg https://bitbucket.org/gutworth/six/src/a3641cb211cc360848f1e2dd92e9ae6cd1de55dd/six.py?at=default
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def add_metaclass(metaclass):
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"""Class decorator for creating a class with a metaclass."""
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def wrapper(cls):
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orig_vars = cls.__dict__.copy()
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orig_vars.pop('__dict__', None)
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orig_vars.pop('__weakref__', None)
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for slots_var in orig_vars.get('__slots__', ()):
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orig_vars.pop(slots_var)
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return metaclass(cls.__name__, cls.__bases__, orig_vars)
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return wrapper
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def get_max_length(choices, max_length, default=200):
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if max_length is None:
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if choices:
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return len(','.join([string_type(key) for key, label in choices]))
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else:
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return default
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return max_length
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class MultiSelectField(models.CharField):
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""" Choice values can not contain commas. """
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def __init__(self, *args, **kwargs):
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super(MultiSelectField, self).__init__(*args, **kwargs)
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self.max_length = get_max_length(self.choices, self.max_length)
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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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choices_selected = []
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for choice_selected in arr_choices:
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choices_selected.append(string_type(choice_selected[0]))
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return choices_selected
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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_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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if django.VERSION[0] >= 1 and django.VERSION[1] >= 6:
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raise exceptions.ValidationError(self.error_messages['invalid_choice'] % {"value": value})
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else:
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raise exceptions.ValidationError(self.error_messages['invalid_choice'] % value)
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def get_default(self):
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default = super(MultiSelectField, self).get_default()
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if isinstance(default, int):
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default = string_type(default)
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return default
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def get_prep_value(self, value):
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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, virtual_only=False):
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super(MultiSelectField, self).contribute_to_class(cls, name, virtual_only)
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if self.choices:
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def get_display(obj):
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fieldname = name
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choicedict = dict(self.choices)
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display = []
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for value in getattr(obj, fieldname):
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item_display = choicedict.get(value, None)
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if item_display is None:
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try:
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item_display = choicedict.get(int(value), value)
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except (ValueError, TypeError):
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item_display = value
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display.append(string_type(item_display))
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return ", ".join(display)
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setattr(cls, 'get_%s_display' % self.name, get_display)
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MultiSelectField = add_metaclass(models.SubfieldBase)(MultiSelectField)
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try:
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from south.modelsinspector import add_introspection_rules
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add_introspection_rules([], ['^spa\.models.fields\.MultiSelectField'])
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except ImportError:
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pass |