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9394d004db
git-svn-id: http://code.djangoproject.com/svn/django/branches/magic-removal@1693 bcc190cf-cafb-0310-a4f2-bffc1f526a37
326 lines
No EOL
16 KiB
Python
326 lines
No EOL
16 KiB
Python
from django.core.exceptions import ObjectDoesNotExist
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from django.core.formfields import Manipulator
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from django.db.models.fields import FileField, AutoField
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class ManipulatorDescriptor(object):
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class empty:
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pass
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def __init__(self, name, base):
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self.man = None
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self.name = name
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self.base = base
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def __get__(self, instance, type=None):
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if instance != None:
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raise "Manipulator accessed via instance"
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else:
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class Man(self.get_base_manipulator(type), self.base):
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pass
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Man.classinit(type)
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Man.__name__ = self.name
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return Man
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def get_base_manipulator(self, type):
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if hasattr(type, 'MANIPULATOR'):
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man = type.MANIPULATOR
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else:
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man = self.empty
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return man
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class AutomaticManipulator(Manipulator):
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def classinit(cls, model):
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cls.model = model
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cls.manager = model._default_manager
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cls.opts = model._meta
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for field_name_list in cls.opts.unique_together:
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setattr(cls, 'isUnique%s' % '_'.join(field_name_list), curry(manipulator_validator_unique_together, field_name_list, opts))
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for f in cls.opts.fields:
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if f.unique_for_date:
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setattr(cls, 'isUnique%sFor%s' % (f.name, f.unique_for_date), curry(manipulator_validator_unique_for_date, f, opts.get_field(f.unique_for_date), opts, 'date'))
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if f.unique_for_month:
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setattr(cls, 'isUnique%sFor%s' % (f.name, f.unique_for_month), curry(manipulator_validator_unique_for_date, f, opts.get_field(f.unique_for_month), opts, 'month'))
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if f.unique_for_year:
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setattr(cls, 'isUnique%sFor%s' % (f.name, f.unique_for_year), curry(manipulator_validator_unique_for_date, f, opts.get_field(f.unique_for_year), opts, 'year'))
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classinit = classmethod(classinit)
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def __init__(self, original_object= None, follow=None):
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self.follow = self.model._meta.get_follow(follow)
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self.fields = []
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self.original_object = original_object
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for f in self.opts.fields + self.opts.many_to_many:
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if self.follow.get(f.name, False):
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self.fields.extend(f.get_manipulator_fields(self.opts, self, self.change))
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# Add fields for related objects.
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for f in self.opts.get_all_related_objects():
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if self.follow.get(f.name, False):
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print f.name
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fol = self.follow[f.name]
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fields = f.get_manipulator_fields(self.opts, self, self.change, fol)
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print fields
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self.fields.extend(fields)
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def save(self, new_data):
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add, change, opts, klass = self.add, self.change, self.opts, self.model
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print add, change, opts, klass
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# TODO: big cleanup when core fields go -> use recursive manipulators.
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from django.utils.datastructures import DotExpandedDict
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params = {}
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for f in opts.fields:
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# Fields with auto_now_add should keep their original value in the change stage.
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auto_now_add = change and getattr(f, 'auto_now_add', False)
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if self.follow.get(f.name, None) and not auto_now_add:
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param = f.get_manipulator_new_data(new_data)
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else:
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if change:
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param = getattr(self.original_object, f.attname)
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else:
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param = f.get_default()
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params[f.attname] = param
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if change:
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params[opts.pk.attname] = self.obj_key
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# First, save the basic object itself.
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new_object = klass(**params)
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new_object.save()
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# Now that the object's been saved, save any uploaded files.
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for f in opts.fields:
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if isinstance(f, FileField):
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f.save_file(new_data, new_object, change and self.original_object or None, change, rel=False)
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# Calculate which primary fields have changed.
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if change:
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self.fields_added, self.fields_changed, self.fields_deleted = [], [], []
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for f in opts.fields:
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if not f.primary_key and str(getattr(self.original_object, f.attname)) != str(getattr(new_object, f.attname)):
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self.fields_changed.append(f.verbose_name)
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# Save many-to-many objects. Example: Poll.set_sites()
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for f in opts.many_to_many:
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if self.follow.get(f.name, None):
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if not f.rel.edit_inline:
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if f.rel.raw_id_admin:
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new_vals = new_data.get(f.name, ())
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else:
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new_vals = new_data.getlist(f.name)
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was_changed = getattr(new_object, 'set_%s' % f.name)(new_vals)
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if change and was_changed:
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self.fields_changed.append(f.verbose_name)
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expanded_data = DotExpandedDict(dict(new_data))
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# Save many-to-one objects. Example: Add the Choice objects for a Poll.
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for related in opts.get_all_related_objects():
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# Create obj_list, which is a DotExpandedDict such as this:
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# [('0', {'id': ['940'], 'choice': ['This is the first choice']}),
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# ('1', {'id': ['941'], 'choice': ['This is the second choice']}),
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# ('2', {'id': [''], 'choice': ['']})]
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child_follow = self.follow.get(related.name, None)
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if child_follow:
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obj_list = expanded_data[related.var_name].items()
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obj_list.sort(lambda x, y: cmp(int(x[0]), int(y[0])))
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params = {}
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# For each related item...
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for _, rel_new_data in obj_list:
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# Keep track of which core=True fields were provided.
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# If all core fields were given, the related object will be saved.
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# If none of the core fields were given, the object will be deleted.
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# If some, but not all, of the fields were given, the validator would
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# have caught that.
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all_cores_given, all_cores_blank = True, True
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# Get a reference to the old object. We'll use it to compare the
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# old to the new, to see which fields have changed.
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old_rel_obj = None
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if change:
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if rel_new_data[related.opts.pk.name][0]:
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try:
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old_rel_obj = getattr(self.original_object, 'get_%s' % related.get_method_name_part() )(**{'%s__exact' % related.opts.pk.name: rel_new_data[related.opts.pk.attname][0]})
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except ObjectDoesNotExist:
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pass
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for f in related.opts.fields:
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if f.core and not isinstance(f, FileField) and f.get_manipulator_new_data(rel_new_data, rel=True) in (None, ''):
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all_cores_given = False
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elif f.core and not isinstance(f, FileField) and f.get_manipulator_new_data(rel_new_data, rel=True) not in (None, ''):
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all_cores_blank = False
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# If this field isn't editable, give it the same value it had
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# previously, according to the given ID. If the ID wasn't
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# given, use a default value. FileFields are also a special
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# case, because they'll be dealt with later.
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if f == related.field:
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param = getattr(new_object, related.field.rel.field_name)
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elif add and isinstance(f, AutoField):
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param = None
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elif change and (isinstance(f, FileField) or not child_follow.get(f.name, None)):
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if old_rel_obj:
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param = getattr(old_rel_obj, f.column)
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else:
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param = f.get_default()
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else:
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param = f.get_manipulator_new_data(rel_new_data, rel=True)
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if param != None:
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params[f.attname] = param
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# Create the related item.
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new_rel_obj = related.model(**params)
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# If all the core fields were provided (non-empty), save the item.
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if all_cores_given:
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new_rel_obj.save()
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# Save any uploaded files.
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for f in related.opts.fields:
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if child_follow.get(f.name, None):
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if isinstance(f, FileField) and rel_new_data.get(f.name, False):
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f.save_file(rel_new_data, new_rel_obj, change and old_rel_obj or None, old_rel_obj is not None, rel=True)
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# Calculate whether any fields have changed.
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if change:
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if not old_rel_obj: # This object didn't exist before.
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self.fields_added.append('%s "%s"' % (related.opts.verbose_name, new_rel_obj))
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else:
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for f in related.opts.fields:
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if not f.primary_key and f != related.field and str(getattr(old_rel_obj, f.attname)) != str(getattr(new_rel_obj, f.attname)):
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self.fields_changed.append('%s for %s "%s"' % (f.verbose_name, related.opts.verbose_name, new_rel_obj))
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# Save many-to-many objects.
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for f in related.opts.many_to_many:
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if child_follow.get(f.name, None) and not f.rel.edit_inline:
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was_changed = getattr(new_rel_obj, 'set_%s' % f.name)(rel_new_data[f.attname])
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if change and was_changed:
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self.fields_changed.append('%s for %s "%s"' % (f.verbose_name, related.opts.verbose_name, new_rel_obj))
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# If, in the change stage, all of the core fields were blank and
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# the primary key (ID) was provided, delete the item.
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if change and all_cores_blank and old_rel_obj:
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new_rel_obj.delete()
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self.fields_deleted.append('%s "%s"' % (related.opts.verbose_name, old_rel_obj))
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# Save the order, if applicable.
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if change and opts.get_ordered_objects():
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order = new_data['order_'] and map(int, new_data['order_'].split(',')) or []
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for rel_opts in opts.get_ordered_objects():
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getattr(new_object, 'set_%s_order' % rel_opts.object_name.lower())(order)
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return new_object
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def get_related_objects(self):
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return self.opts.get_followed_related_objects(self.follow)
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def flatten_data(self):
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new_data = {}
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for f in self.opts.get_data_holders(self.follow):
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fol = self.follow.get(f.name)
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new_data.update(f.flatten_data(fol, self.original_object))
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return new_data
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class ModelAddManipulator(AutomaticManipulator):
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change = False
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add = True
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def __init__(self, follow=None):
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super(ModelAddManipulator, self).__init__(follow=follow)
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class ModelChangeManipulator(AutomaticManipulator):
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change = True
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add = False
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def __init__(self, obj_key=None, follow=None):
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assert obj_key is not None, "ChangeManipulator.__init__() must be passed obj_key parameter."
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self.obj_key = obj_key
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try:
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original_object = self.__class__.manager.get_object(pk=obj_key)
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except ObjectDoesNotExist:
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# If the object doesn't exist, this might be a manipulator for a
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# one-to-one related object that hasn't created its subobject yet.
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# For example, this might be a Restaurant for a Place that doesn't
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# yet have restaurant information.
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if opts.one_to_one_field:
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# Sanity check -- Make sure the "parent" object exists.
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# For example, make sure the Place exists for the Restaurant.
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# Let the ObjectDoesNotExist exception propogate up.
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lookup_kwargs = opts.one_to_one_field.rel.limit_choices_to
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lookup_kwargs['%s__exact' % opts.one_to_one_field.rel.field_name] = obj_key
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_ = opts.one_to_one_field.rel.to._meta.get_model_module().get_object(**lookup_kwargs)
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params = dict([(f.attname, f.get_default()) for f in opts.fields])
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params[opts.pk.attname] = obj_key
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original_object = opts.get_model_module().Klass(**params)
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else:
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raise
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print "calling super"
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super(ModelChangeManipulator, self).__init__(original_object=original_object, follow=follow)
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print "Back"
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self.original_object = original_object
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if self.opts.get_ordered_objects():
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self.fields.append(formfields.CommaSeparatedIntegerField(field_name="order_"))
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def manipulator_validator_unique_together(field_name_list, opts, self, field_data, all_data):
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from django.utils.text import get_text_list
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field_list = [opts.get_field(field_name) for field_name in field_name_list]
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if isinstance(field_list[0].rel, ManyToOne):
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kwargs = {'%s__%s__iexact' % (field_name_list[0], field_list[0].rel.field_name): field_data}
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else:
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kwargs = {'%s__iexact' % field_name_list[0]: field_data}
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for f in field_list[1:]:
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# This is really not going to work for fields that have different
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# form fields, e.g. DateTime.
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# This validation needs to occur after html2python to be effective.
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field_val = all_data.get(f.attname, None)
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if field_val is None:
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# This will be caught by another validator, assuming the field
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# doesn't have blank=True.
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return
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if isinstance(f.rel, ManyToOne):
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kwargs['%s__pk' % f.name] = field_val
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else:
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kwargs['%s__iexact' % f.name] = field_val
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mod = opts.get_model_module()
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try:
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old_obj = mod.get_object(**kwargs)
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except ObjectDoesNotExist:
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return
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if hasattr(self, 'original_object') and getattr(self.original_object, opts.pk.attname) == getattr(old_obj, opts.pk.attname):
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pass
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else:
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raise validators.ValidationError, _("%(object)s with this %(type)s already exists for the given %(field)s.") % \
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{'object': capfirst(opts.verbose_name), 'type': field_list[0].verbose_name, 'field': get_text_list(field_name_list[1:], 'and')}
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def manipulator_validator_unique_for_date(from_field, date_field, opts, lookup_type, self, field_data, all_data):
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date_str = all_data.get(date_field.get_manipulator_field_names('')[0], None)
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mod = opts.get_model_module()
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date_val = formfields.DateField.html2python(date_str)
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if date_val is None:
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return # Date was invalid. This will be caught by another validator.
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lookup_kwargs = {'%s__year' % date_field.name: date_val.year}
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if isinstance(from_field.rel, ManyToOne):
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lookup_kwargs['%s__pk' % from_field.name] = field_data
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else:
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lookup_kwargs['%s__iexact' % from_field.name] = field_data
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if lookup_type in ('month', 'date'):
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lookup_kwargs['%s__month' % date_field.name] = date_val.month
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if lookup_type == 'date':
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lookup_kwargs['%s__day' % date_field.name] = date_val.day
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try:
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old_obj = mod.get_object(**lookup_kwargs)
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except ObjectDoesNotExist:
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return
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else:
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if hasattr(self, 'original_object') and getattr(self.original_object, opts.pk.attname) == getattr(old_obj, opts.pk.attname):
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pass
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else:
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format_string = (lookup_type == 'date') and '%B %d, %Y' or '%B %Y'
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raise validators.ValidationError, "Please enter a different %s. The one you entered is already being used for %s." % \
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(from_field.verbose_name, date_val.strftime(format_string))
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