Source code for nsot.models.value

from __future__ import unicode_literals

from django.db import models

from .. import exc
from . import constants
from .attribute import Attribute

[docs]class Value(models.Model): """Represents a value for an attribute attached to a Resource.""" attribute = models.ForeignKey( 'Attribute', related_name='values', db_index=True, on_delete=models.PROTECT, help_text='The Attribute to which this Value is assigned.' ) value = models.CharField( max_length=255, null=False, blank=True, db_index=True, help_text='The Attribute value.' ) resource_id = models.IntegerField( 'Resource ID', null=False, help_text='The unique ID of the Resource to which the Value is bound.', ) resource_name = models.CharField( 'Resource Type', max_length=20, null=False, db_index=True, choices=constants.RESOURCE_CHOICES, help_text='The name of the Resource type to which the Value is bound.', ) name = models.CharField( 'Name', max_length=64, null=False, blank=True, help_text=( 'The name of the Attribute to which the Value is bound. ' '(Internal use only)' ) ) # We are currently inferring the site_id from the parent Attribute in # .save() method. We don't want to even care about the site_id, but it # simplifies managing them this way. site = models.ForeignKey( 'Site', db_index=True, related_name='values', on_delete=models.PROTECT, verbose_name='Site', help_text='Unique ID of the Site this Value is under.' ) def __init__(self, *args, **kwargs): self._obj = kwargs.pop('obj', None) super(Value, self).__init__(*args, **kwargs) def __unicode__(self): return u'%s:%s %s=%s' % (self.resource_name, self.resource_id,, self.value) class Meta: unique_together = ('name', 'value', 'resource_name', 'resource_id') # This is most commonly looked up index_together = [ ('name', 'value', 'resource_name'), ('resource_name', 'resource_id'), ] def clean_resource_name(self, value): if value not in constants.VALID_ATTRIBUTE_RESOURCES: raise exc.ValidationError('Invalid resource name: %r.' % value) return value def clean_name(self, attr): return
[docs] def clean_site(self, value): """Always enforce that site is set.""" if value is None: try: return self.attribute.site_id except Attribute.DoesNotExist: return Attribute.objects.get(id=self.attribute_id).site_id return value
def clean_fields(self, exclude=None): obj = self._obj if obj is None: return None self.site_id = self.clean_site(self.site_id) self.resource_name = self.clean_resource_name(obj.__class__.__name__) self.resource_id = = self.clean_name(self.attribute) def save(self, *args, **kwargs): self.full_clean() super(Value, self).save(*args, **kwargs) def to_dict(self): return { 'id':, 'name':, 'value': self.value, 'attribute': self.attribute_id, 'resource_name': self.resource_name, 'resource_id': self.resource_id, }