100 lines
3.3 KiB
Python
100 lines
3.3 KiB
Python
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import os
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from django.core import exceptions
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from django.urls import reverse
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from django.db import models
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from django.db.models.fields.files import FileField, FieldFile
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from django.utils.text import capfirst
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from ..forms.fields import MultiSelectFormField
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class MultiSelectField(models.CharField):
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def formfield(self, **kwargs):
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defaults = {
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'required': not self.blank,
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'label': capfirst(self.verbose_name),
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'help_text': self.help_text,
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'choices': self.choices
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}
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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=None, prepared=False):
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if isinstance(value, str):
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return value
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else:
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return ','.join(value)
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def to_python(self, value):
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if value:
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if isinstance(value, str):
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return value.split(',')
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return value
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return []
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def from_db_value(self, value, expression, connection):
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if value:
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if isinstance(value, str):
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return value.split(',')
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return value
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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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def func(self, field=name, choices=dict(self.choices)):
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return ','.join([choices.get(value, value) for value in getattr(self, field)])
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setattr(cls, 'get_%s_display' % self.name, func)
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def validate(self, value, model_instance):
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if self.choices:
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arr_choices = self.get_choices_selected(self.get_choices())
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for opt_select in value:
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if (opt_select not in arr_choices):
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msg = self.error_messages['invalid_choice'] % {'value': opt_select}
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raise exceptions.ValidationError(msg)
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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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return [value for value, __ in arr_choices]
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class NullableCharField(models.CharField):
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def get_db_prep_value(self, value, connection=None, prepared=False):
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return value or None
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class PrivateFieldFile(FieldFile):
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@property
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def url(self):
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self._require_file()
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app_label = self.instance._meta.app_label
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model_name = self.instance._meta.object_name.lower()
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field_name = self.field.name
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pk = self.instance.pk
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filename = os.path.basename(self.path)
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args = [app_label, model_name, field_name, pk, filename]
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return reverse('private-media', args=args)
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@property
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def condition(self):
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return self.field.condition
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@property
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def attachment(self):
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return self.field.attachment
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class PrivateFileField(FileField):
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attr_class = PrivateFieldFile
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def __init__(self, verbose_name=None, name=None, upload_to='', storage=None, attachment=True,
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condition=lambda request, instance: request.user.is_superuser, **kwargs):
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super(PrivateFileField, self).__init__(verbose_name, name, upload_to, storage, **kwargs)
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self.condition = condition
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self.attachment = attachment
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