<commit_before>from __future__ import unicode_literals

import copy
import sys
from functools import update_wrapper
from django.utils.six.moves import zip

import django.db.models.manager     # Imported to register signal handler.
from django.conf import settings
from django.core.exceptions import (ObjectDoesNotExist,
    MultipleObjectsReturned, FieldError, ValidationError, NON_FIELD_ERRORS)
from django.core import validators
from django.db.models.fields import AutoField, FieldDoesNotExist
from django.db.models.fields.related import (ManyToOneRel,
    OneToOneField, add_lazy_relation)
from django.db import (router, transaction, DatabaseError,
    DEFAULT_DB_ALIAS)
from django.db.models.query import Q
from django.db.models.query_utils import DeferredAttribute, deferred_class_factory
from django.db.models.deletion import Collector
from django.db.models.options import Options
from django.db.models import signals
from django.db.models.loading import register_models, get_model
from django.utils.translation import ugettext_lazy as _
from django.utils.functional import curry
from django.utils.encoding import smart_bytes, force_text
from django.utils import six
from django.utils.text import get_text_list, capfirst


def subclass_exception(name, parents, module, attached_to=None):
    """
    Create exception subclass. Used by ModelBase below.

    If 'attached_to' is supplied, the exception will be created in a way that
    allows it to be pickled, assuming the returned exception class will be added
    as an attribute to the 'attached_to' class.
    """
    class_dict = {'__module__': module}
    if attached_to is not None:
        def __reduce__(self):
            # Exceptions are special - they've got state that isn't
            # in self.__dict__. We assume it is all in self.args.
            return (unpickle_inner_exception, (attached_to, name), self.args)

        def __setstate__(self, args):
            self.args = args

        class_dict['__reduce__'] = __reduce__
        class_dict['__setstate__'] = __setstate__

    return type(name, parents, class_dict)


class ModelBase(type):
    """
    Metaclass for all models.
    """
    def __new__(cls, name, bases, attrs):
        super_new = super(ModelBase, cls).__new__
        # six.with_metaclass() inserts an extra class called 'NewBase' in the
        # inheritance tree: Model -> NewBase -> object. Ignore this class.
        parents = [b for b in bases if isinstance(b, ModelBase) and
                not (b.__name__ == 'NewBase' and b.__mro__ == (b, object))]
        if not parents:
            # If this isn't a subclass of Model, don't do anything special.
            return super_new(cls, name, bases, attrs)

        # Create the class.
        module = attrs.pop('__module__')
        new_class = super_new(cls, name, bases, {'__module__': module})
        attr_meta = attrs.pop('Meta', None)
        abstract = getattr(attr_meta, 'abstract', False)
        if not attr_meta:
            meta = getattr(new_class, 'Meta', None)
        else:
            meta = attr_meta
        base_meta = getattr(new_class, '_meta', None)

        if getattr(meta, 'app_label', None) is None:
            # Figure out the app_label by looking one level up.
            # For 'django.contrib.sites.models', this would be 'sites'.
            model_module = sys.modules[new_class.__module__]
            kwargs = {"app_label": model_module.__name__.split('.')[-2]}
        else:
            kwargs = {}

        new_class.add_to_class('_meta', Options(meta, **kwargs))
        if not abstract:
            new_class.add_to_class('DoesNotExist', subclass_exception(str('DoesNotExist'),
                    tuple(x.DoesNotExist
                          for x in parents if hasattr(x, '_meta') and not x._meta.abstract)
                    or (ObjectDoesNotExist,),
                    module, attached_to=new_class))
            new_class.add_to_class('MultipleObjectsReturned', subclass_exception(str('MultipleObjectsReturned'),
                    tuple(x.MultipleObjectsReturned
                          for x in parents if hasattr(x, '_meta') and not x._meta.abstract)
                    or (MultipleObjectsReturned,),
                    module, attached_to=new_class))
            if base_meta and not base_meta.abstract:
                # Non-abstract child classes inherit some attributes from their
                # non-abstract parent (unless an ABC comes before it in the
                # method resolution order).
                if not hasattr(meta, 'ordering'):
                    new_class._meta.ordering = base_meta.ordering
                if not hasattr(meta, 'get_latest_by'):
                    new_class._meta.get_latest_by = base_meta.get_latest_by

        is_proxy = new_class._meta.proxy

        if getattr(new_class, '_default_manager', None):
            if not is_proxy:
                # Multi-table inheritance doesn't inherit default manager from
                # parents.
                new_class._default_manager = None
                new_class._base_manager = None
            else:
                # Proxy classes do inherit parent's default manager, if none is
                # set explicitly.
                new_class._default_manager = new_class._default_manager._copy_to_model(new_class)
                new_class._base_manager = new_class._base_manager._copy_to_model(new_class)

        # Bail out early if we have already created this class.
        m = get_model(new_class._meta.app_label, name,
                      seed_cache=False, only_installed=False)
        if m is not None:
            return m

        # Add all attributes to the class.
        for obj_name, obj in attrs.items():
            new_class.add_to_class(obj_name, obj)

        # All the fields of any type declared on this model
        new_fields = new_class._meta.local_fields + \
                     new_class._meta.local_many_to_many + \
                     new_class._meta.virtual_fields
        field_names = set([f.name for f in new_fields])

        # Basic setup for proxy models.
        if is_proxy:
            base = None
            for parent in [cls for cls in parents if hasattr(cls, '_meta')]:
                if parent._meta.abstract:
                    if parent._meta.fields:
                        raise TypeError("Abstract base class containing model fields not permitted for proxy model '%s'." % name)
                    else:
                        continue
                if base is not None:
                    raise TypeError("Proxy model '%s' has more than one non-abstract model base class." % name)
                else:
                    base = parent
            if base is None:
                    raise TypeError("Proxy model '%s' has no non-abstract model base class." % name)
            if (new_class._meta.local_fields or
                    new_class._meta.local_many_to_many):
                raise FieldError("Proxy model '%s' contains model fields." % name)
            new_class._meta.setup_proxy(base)
            new_class._meta.concrete_model = base._meta.concrete_model
        else:
            new_class._meta.concrete_model = new_class

        # Do the appropriate setup for any model parents.
        o2o_map = dict([(f.rel.to, f) for f in new_class._meta.local_fields
                if isinstance(f, OneToOneField)])

        for base in parents:
            original_base = base
            if not hasattr(base, '_meta'):
                # Things without _meta aren't functional models, so they're
                # uninteresting parents.
                continue

            parent_fields = base._meta.local_fields + base._meta.local_many_to_many
            # Check for clashes between locally declared fields and those
            # on the base classes (we cannot handle shadowed fields at the
            # moment).
            for field in parent_fields:
                if field.name in field_names:
                    raise FieldError('Local field %r in class %r clashes '
                                     'with field of similar name from '
                                     'base class %r' %
                                        (field.name, name, base.__name__))
            if not base._meta.abstract:
                # Concrete classes...
                base = base._meta.concrete_model
                if base in o2o_map:
                    field = o2o_map[base]
                elif not is_proxy:
                    attr_name = '%s_ptr' % base._meta.module_name
                    field = OneToOneField(base, name=attr_name,
                            auto_created=True, parent_link=True)
                    new_class.add_to_class(attr_name, field)
                else:
                    field = None
                new_class._meta.parents[base] = field
            else:
                # .. and abstract ones.
                for field in parent_fields:
                    new_class.add_to_class(field.name, copy.deepcopy(field))

                # Pass any non-abstract parent classes onto child.
                new_class._meta.parents.update(base._meta.parents)

            # Inherit managers from the abstract base classes.
            new_class.copy_managers(base._meta.abstract_managers)

            # Proxy models inherit the non-abstract managers from their base,
            # unless they have redefined any of them.
            if is_proxy:
                new_class.copy_managers(original_base._meta.concrete_managers)

            # Inherit virtual fields (like GenericForeignKey) from the parent
            # class
            for field in base._meta.virtual_fields:
                if base._meta.abstract and field.name in field_names:
                    raise FieldError('Local field %r in class %r clashes '\
                                     'with field of similar name from '\
                                     'abstract base class %r' % \
                                        (field.name, name, base.__name__))
                new_class.add_to_class(field.name, copy.deepcopy(field))

        if abstract:
            # Abstract base models can't be instantiated and don't appear in
            # the list of models for an app. We do the final setup for them a
            # little differently from normal models.
            attr_meta.abstract = False
            new_class.Meta = attr_meta
            return new_class

        new_class._prepare()
        register_models(new_class._meta.app_label, new_class)

        # Because of the way imports happen (recursively), we may or may not be
        # the first time this model tries to register with the framework. There
        # should only be one class for each model, so we always return the
        # registered version.
        return get_model(new_class._meta.app_label, name,
                         seed_cache=False, only_installed=False)

    def copy_managers(cls, base_managers):
        # This is in-place sorting of an Options attribute, but that's fine.
        base_managers.sort()
        for _, mgr_name, manager in base_managers:
            val = getattr(cls, mgr_name, None)
            if not val or val is manager:
                new_manager = manager._copy_to_model(cls)
                cls.add_to_class(mgr_name, new_manager)

    def add_to_class(cls, name, value):
        if hasattr(value, 'contribute_to_class'):
            value.contribute_to_class(cls, name)
        else:
            setattr(cls, name, value)

    def _prepare(cls):
        """
        Creates some methods once self._meta has been populated.
        """
        opts = cls._meta
        opts._prepare(cls)

        if opts.order_with_respect_to:
            cls.get_next_in_order = curry(cls._get_next_or_previous_in_order, is_next=True)
            cls.get_previous_in_order = curry(cls._get_next_or_previous_in_order, is_next=False)
            # defer creating accessors on the foreign class until we are
            # certain it has been created
            def make_foreign_order_accessors(field, model, cls):
                setattr(
                    field.rel.to,
                    'get_%s_order' % cls.__name__.lower(),
                    curry(method_get_order, cls)
                )
                setattr(
                    field.rel.to,
                    'set_%s_order' % cls.__name__.lower(),
                    curry(method_set_order, cls)
                )
            add_lazy_relation(
                cls,
                opts.order_with_respect_to,
                opts.order_with_respect_to.rel.to,
                make_foreign_order_accessors
            )

        # Give the class a docstring -- its definition.
        if cls.__doc__ is None:
            cls.__doc__ = "%s(%s)" % (cls.__name__, ", ".join([f.attname for f in opts.fields]))

        if hasattr(cls, 'get_absolute_url'):
            cls.get_absolute_url = update_wrapper(curry(get_absolute_url, opts, cls.get_absolute_url),
                                                  cls.get_absolute_url)

        signals.class_prepared.send(sender=cls)

class ModelState(object):
    """
    A class for storing instance state
    """
    def __init__(self, db=None):
        self.db = db
        # If true, uniqueness validation checks will consider this a new, as-yet-unsaved object.
        # Necessary for correct validation of new instances of objects with explicit (non-auto) PKs.
        # This impacts validation only; it has no effect on the actual save.
        self.adding = True

class Model(six.with_metaclass(ModelBase, object)):
    _deferred = False

    def __init__(self, *args, **kwargs):
        signals.pre_init.send(sender=self.__class__, args=args, kwargs=kwargs)

        # Set up the storage for instance state
        self._state = ModelState()

        # There is a rather weird disparity here; if kwargs, it's set, then args
        # overrides it. It should be one or the other; don't duplicate the work
        # The reason for the kwargs check is that standard iterator passes in by
        # args, and instantiation for iteration is 33% faster.
        args_len = len(args)
        if args_len > len(self._meta.fields):
            # Daft, but matches old exception sans the err msg.
            raise IndexError("Number of args exceeds number of fields")

        fields_iter = iter(self._meta.fields)
        if not kwargs:
            # The ordering of the zip calls matter - zip throws StopIteration
            # when an iter throws it. So if the first iter throws it, the second
            # is *not* consumed. We rely on this, so don't change the order
            # without changing the logic.
            for val, field in zip(args, fields_iter):
                setattr(self, field.attname, val)
        else:
            # Slower, kwargs-ready version.
            for val, field in zip(args, fields_iter):
                setattr(self, field.attname, val)
                kwargs.pop(field.name, None)
                # Maintain compatibility with existing calls.
                if isinstance(field.rel, ManyToOneRel):
                    kwargs.pop(field.attname, None)

        # Now we're left with the unprocessed fields that *must* come from
        # keywords, or default.

        for field in fields_iter:
            is_related_object = False
            # This slightly odd construct is so that we can access any
            # data-descriptor object (DeferredAttribute) without triggering its
            # __get__ method.
            if (field.attname not in kwargs and
                    isinstance(self.__class__.__dict__.get(field.attname), DeferredAttribute)):
                # This field will be populated on request.
                continue
            if kwargs:
                if isinstance(field.rel, ManyToOneRel):
                    try:
                        # Assume object instance was passed in.
                        rel_obj = kwargs.pop(field.name)
                        is_related_object = True
                    except KeyError:
                        try:
                            # Object instance wasn't passed in -- must be an ID.
                            val = kwargs.pop(field.attname)
                        except KeyError:
                            val = field.get_default()
                    else:
                        # Object instance was passed in. Special case: You can
                        # pass in "None" for related objects if it's allowed.
                        if rel_obj is None and field.null:
                            val = None
                else:
                    try:
                        val = kwargs.pop(field.attname)
                    except KeyError:
                        # This is done with an exception rather than the
                        # default argument on pop because we don't want
                        # get_default() to be evaluated, and then not used.
                        # Refs #12057.
                        val = field.get_default()
            else:
                val = field.get_default()
            if is_related_object:
                # If we are passed a related instance, set it using the
                # field.name instead of field.attname (e.g. "user" instead of
                # "user_id") so that the object gets properly cached (and type
                # checked) by the RelatedObjectDescriptor.
                setattr(self, field.name, rel_obj)
            else:
                setattr(self, field.attname, val)

        if kwargs:
            for prop in list(kwargs):
                try:
                    if isinstance(getattr(self.__class__, prop), property):
                        setattr(self, prop, kwargs.pop(prop))
                except AttributeError:
                    pass
            if kwargs:
                raise TypeError("'%s' is an invalid keyword argument for this function" % list(kwargs)[0])
        super(Model, self).__init__()
        signals.post_init.send(sender=self.__class__, instance=self)

    def __repr__(self):
        try:
            u = six.text_type(self)
        except (UnicodeEncodeError, UnicodeDecodeError):
            u = '[Bad Unicode data]'
        return smart_bytes('<%s: %s>' % (self.__class__.__name__, u))

    def __str__(self):
        if hasattr(self, '__unicode__'):
            return force_text(self).encode('utf-8')
        return '%s object' % self.__class__.__name__

    def __eq__(self, other):
        return isinstance(other, self.__class__) and self._get_pk_val() == other._get_pk_val()

    def __ne__(self, other):
        return not self.__eq__(other)

    def __hash__(self):
        return hash(self._get_pk_val())

    def __reduce__(self):
        """
        Provides pickling support. Normally, this just dispatches to Python's
        standard handling. However, for models with deferred field loading, we
        need to do things manually, as they're dynamically created classes and
        only module-level classes can be pickled by the default path.
        """
        if not self._deferred:
            return super(Model, self).__reduce__()
        data = self.__dict__
        defers = []<commit_msg>[py3] Avoided returning bytes in Model.__str__<commit_after>from __future__ import unicode_literals

import copy
import sys
from functools import update_wrapper
from django.utils.six.moves import zip

import django.db.models.manager     # Imported to register signal handler.
from django.conf import settings
from django.core.exceptions import (ObjectDoesNotExist,
    MultipleObjectsReturned, FieldError, ValidationError, NON_FIELD_ERRORS)
from django.core import validators
from django.db.models.fields import AutoField, FieldDoesNotExist
from django.db.models.fields.related import (ManyToOneRel,
    OneToOneField, add_lazy_relation)
from django.db import (router, transaction, DatabaseError,
    DEFAULT_DB_ALIAS)
from django.db.models.query import Q
from django.db.models.query_utils import DeferredAttribute, deferred_class_factory
from django.db.models.deletion import Collector
from django.db.models.options import Options
from django.db.models import signals
from django.db.models.loading import register_models, get_model
from django.utils.translation import ugettext_lazy as _
from django.utils.functional import curry
from django.utils.encoding import smart_bytes, force_text
from django.utils import six
from django.utils.text import get_text_list, capfirst


def subclass_exception(name, parents, module, attached_to=None):
    """
    Create exception subclass. Used by ModelBase below.

    If 'attached_to' is supplied, the exception will be created in a way that
    allows it to be pickled, assuming the returned exception class will be added
    as an attribute to the 'attached_to' class.
    """
    class_dict = {'__module__': module}
    if attached_to is not None:
        def __reduce__(self):
            # Exceptions are special - they've got state that isn't
            # in self.__dict__. We assume it is all in self.args.
            return (unpickle_inner_exception, (attached_to, name), self.args)

        def __setstate__(self, args):
            self.args = args

        class_dict['__reduce__'] = __reduce__
        class_dict['__setstate__'] = __setstate__

    return type(name, parents, class_dict)


class ModelBase(type):
    """
    Metaclass for all models.
    """
    def __new__(cls, name, bases, attrs):
        super_new = super(ModelBase, cls).__new__
        # six.with_metaclass() inserts an extra class called 'NewBase' in the
        # inheritance tree: Model -> NewBase -> object. Ignore this class.
        parents = [b for b in bases if isinstance(b, ModelBase) and
                not (b.__name__ == 'NewBase' and b.__mro__ == (b, object))]
        if not parents:
            # If this isn't a subclass of Model, don't do anything special.
            return super_new(cls, name, bases, attrs)

        # Create the class.
        module = attrs.pop('__module__')
        new_class = super_new(cls, name, bases, {'__module__': module})
        attr_meta = attrs.pop('Meta', None)
        abstract = getattr(attr_meta, 'abstract', False)
        if not attr_meta:
            meta = getattr(new_class, 'Meta', None)
        else:
            meta = attr_meta
        base_meta = getattr(new_class, '_meta', None)

        if getattr(meta, 'app_label', None) is None:
            # Figure out the app_label by looking one level up.
            # For 'django.contrib.sites.models', this would be 'sites'.
            model_module = sys.modules[new_class.__module__]
            kwargs = {"app_label": model_module.__name__.split('.')[-2]}
        else:
            kwargs = {}

        new_class.add_to_class('_meta', Options(meta, **kwargs))
        if not abstract:
            new_class.add_to_class('DoesNotExist', subclass_exception(str('DoesNotExist'),
                    tuple(x.DoesNotExist
                          for x in parents if hasattr(x, '_meta') and not x._meta.abstract)
                    or (ObjectDoesNotExist,),
                    module, attached_to=new_class))
            new_class.add_to_class('MultipleObjectsReturned', subclass_exception(str('MultipleObjectsReturned'),
                    tuple(x.MultipleObjectsReturned
                          for x in parents if hasattr(x, '_meta') and not x._meta.abstract)
                    or (MultipleObjectsReturned,),
                    module, attached_to=new_class))
            if base_meta and not base_meta.abstract:
                # Non-abstract child classes inherit some attributes from their
                # non-abstract parent (unless an ABC comes before it in the
                # method resolution order).
                if not hasattr(meta, 'ordering'):
                    new_class._meta.ordering = base_meta.ordering
                if not hasattr(meta, 'get_latest_by'):
                    new_class._meta.get_latest_by = base_meta.get_latest_by

        is_proxy = new_class._meta.proxy

        if getattr(new_class, '_default_manager', None):
            if not is_proxy:
                # Multi-table inheritance doesn't inherit default manager from
                # parents.
                new_class._default_manager = None
                new_class._base_manager = None
            else:
                # Proxy classes do inherit parent's default manager, if none is
                # set explicitly.
                new_class._default_manager = new_class._default_manager._copy_to_model(new_class)
                new_class._base_manager = new_class._base_manager._copy_to_model(new_class)

        # Bail out early if we have already created this class.
        m = get_model(new_class._meta.app_label, name,
                      seed_cache=False, only_installed=False)
        if m is not None:
            return m

        # Add all attributes to the class.
        for obj_name, obj in attrs.items():
            new_class.add_to_class(obj_name, obj)

        # All the fields of any type declared on this model
        new_fields = new_class._meta.local_fields + \
                     new_class._meta.local_many_to_many + \
                     new_class._meta.virtual_fields
        field_names = set([f.name for f in new_fields])

        # Basic setup for proxy models.
        if is_proxy:
            base = None
            for parent in [cls for cls in parents if hasattr(cls, '_meta')]:
                if parent._meta.abstract:
                    if parent._meta.fields:
                        raise TypeError("Abstract base class containing model fields not permitted for proxy model '%s'." % name)
                    else:
                        continue
                if base is not None:
                    raise TypeError("Proxy model '%s' has more than one non-abstract model base class." % name)
                else:
                    base = parent
            if base is None:
                    raise TypeError("Proxy model '%s' has no non-abstract model base class." % name)
            if (new_class._meta.local_fields or
                    new_class._meta.local_many_to_many):
                raise FieldError("Proxy model '%s' contains model fields." % name)
            new_class._meta.setup_proxy(base)
            new_class._meta.concrete_model = base._meta.concrete_model
        else:
            new_class._meta.concrete_model = new_class

        # Do the appropriate setup for any model parents.
        o2o_map = dict([(f.rel.to, f) for f in new_class._meta.local_fields
                if isinstance(f, OneToOneField)])

        for base in parents:
            original_base = base
            if not hasattr(base, '_meta'):
                # Things without _meta aren't functional models, so they're
                # uninteresting parents.
                continue

            parent_fields = base._meta.local_fields + base._meta.local_many_to_many
            # Check for clashes between locally declared fields and those
            # on the base classes (we cannot handle shadowed fields at the
            # moment).
            for field in parent_fields:
                if field.name in field_names:
                    raise FieldError('Local field %r in class %r clashes '
                                     'with field of similar name from '
                                     'base class %r' %
                                        (field.name, name, base.__name__))
            if not base._meta.abstract:
                # Concrete classes...
                base = base._meta.concrete_model
                if base in o2o_map:
                    field = o2o_map[base]
                elif not is_proxy:
                    attr_name = '%s_ptr' % base._meta.module_name
                    field = OneToOneField(base, name=attr_name,
                            auto_created=True, parent_link=True)
                    new_class.add_to_class(attr_name, field)
                else:
                    field = None
                new_class._meta.parents[base] = field
            else:
                # .. and abstract ones.
                for field in parent_fields:
                    new_class.add_to_class(field.name, copy.deepcopy(field))

                # Pass any non-abstract parent classes onto child.
                new_class._meta.parents.update(base._meta.parents)

            # Inherit managers from the abstract base classes.
            new_class.copy_managers(base._meta.abstract_managers)

            # Proxy models inherit the non-abstract managers from their base,
            # unless they have redefined any of them.
            if is_proxy:
                new_class.copy_managers(original_base._meta.concrete_managers)

            # Inherit virtual fields (like GenericForeignKey) from the parent
            # class
            for field in base._meta.virtual_fields:
                if base._meta.abstract and field.name in field_names:
                    raise FieldError('Local field %r in class %r clashes '\
                                     'with field of similar name from '\
                                     'abstract base class %r' % \
                                        (field.name, name, base.__name__))
                new_class.add_to_class(field.name, copy.deepcopy(field))

        if abstract:
            # Abstract base models can't be instantiated and don't appear in
            # the list of models for an app. We do the final setup for them a
            # little differently from normal models.
            attr_meta.abstract = False
            new_class.Meta = attr_meta
            return new_class

        new_class._prepare()
        register_models(new_class._meta.app_label, new_class)

        # Because of the way imports happen (recursively), we may or may not be
        # the first time this model tries to register with the framework. There
        # should only be one class for each model, so we always return the
        # registered version.
        return get_model(new_class._meta.app_label, name,
                         seed_cache=False, only_installed=False)

    def copy_managers(cls, base_managers):
        # This is in-place sorting of an Options attribute, but that's fine.
        base_managers.sort()
        for _, mgr_name, manager in base_managers:
            val = getattr(cls, mgr_name, None)
            if not val or val is manager:
                new_manager = manager._copy_to_model(cls)
                cls.add_to_class(mgr_name, new_manager)

    def add_to_class(cls, name, value):
        if hasattr(value, 'contribute_to_class'):
            value.contribute_to_class(cls, name)
        else:
            setattr(cls, name, value)

    def _prepare(cls):
        """
        Creates some methods once self._meta has been populated.
        """
        opts = cls._meta
        opts._prepare(cls)

        if opts.order_with_respect_to:
            cls.get_next_in_order = curry(cls._get_next_or_previous_in_order, is_next=True)
            cls.get_previous_in_order = curry(cls._get_next_or_previous_in_order, is_next=False)
            # defer creating accessors on the foreign class until we are
            # certain it has been created
            def make_foreign_order_accessors(field, model, cls):
                setattr(
                    field.rel.to,
                    'get_%s_order' % cls.__name__.lower(),
                    curry(method_get_order, cls)
                )
                setattr(
                    field.rel.to,
                    'set_%s_order' % cls.__name__.lower(),
                    curry(method_set_order, cls)
                )
            add_lazy_relation(
                cls,
                opts.order_with_respect_to,
                opts.order_with_respect_to.rel.to,
                make_foreign_order_accessors
            )

        # Give the class a docstring -- its definition.
        if cls.__doc__ is None:
            cls.__doc__ = "%s(%s)" % (cls.__name__, ", ".join([f.attname for f in opts.fields]))

        if hasattr(cls, 'get_absolute_url'):
            cls.get_absolute_url = update_wrapper(curry(get_absolute_url, opts, cls.get_absolute_url),
                                                  cls.get_absolute_url)

        signals.class_prepared.send(sender=cls)

class ModelState(object):
    """
    A class for storing instance state
    """
    def __init__(self, db=None):
        self.db = db
        # If true, uniqueness validation checks will consider this a new, as-yet-unsaved object.
        # Necessary for correct validation of new instances of objects with explicit (non-auto) PKs.
        # This impacts validation only; it has no effect on the actual save.
        self.adding = True

class Model(six.with_metaclass(ModelBase, object)):
    _deferred = False

    def __init__(self, *args, **kwargs):
        signals.pre_init.send(sender=self.__class__, args=args, kwargs=kwargs)

        # Set up the storage for instance state
        self._state = ModelState()

        # There is a rather weird disparity here; if kwargs, it's set, then args
        # overrides it. It should be one or the other; don't duplicate the work
        # The reason for the kwargs check is that standard iterator passes in by
        # args, and instantiation for iteration is 33% faster.
        args_len = len(args)
        if args_len > len(self._meta.fields):
            # Daft, but matches old exception sans the err msg.
            raise IndexError("Number of args exceeds number of fields")

        fields_iter = iter(self._meta.fields)
        if not kwargs:
            # The ordering of the zip calls matter - zip throws StopIteration
            # when an iter throws it. So if the first iter throws it, the second
            # is *not* consumed. We rely on this, so don't change the order
            # without changing the logic.
            for val, field in zip(args, fields_iter):
                setattr(self, field.attname, val)
        else:
            # Slower, kwargs-ready version.
            for val, field in zip(args, fields_iter):
                setattr(self, field.attname, val)
                kwargs.pop(field.name, None)
                # Maintain compatibility with existing calls.
                if isinstance(field.rel, ManyToOneRel):
                    kwargs.pop(field.attname, None)

        # Now we're left with the unprocessed fields that *must* come from
        # keywords, or default.

        for field in fields_iter:
            is_related_object = False
            # This slightly odd construct is so that we can access any
            # data-descriptor object (DeferredAttribute) without triggering its
            # __get__ method.
            if (field.attname not in kwargs and
                    isinstance(self.__class__.__dict__.get(field.attname), DeferredAttribute)):
                # This field will be populated on request.
                continue
            if kwargs:
                if isinstance(field.rel, ManyToOneRel):
                    try:
                        # Assume object instance was passed in.
                        rel_obj = kwargs.pop(field.name)
                        is_related_object = True
                    except KeyError:
                        try:
                            # Object instance wasn't passed in -- must be an ID.
                            val = kwargs.pop(field.attname)
                        except KeyError:
                            val = field.get_default()
                    else:
                        # Object instance was passed in. Special case: You can
                        # pass in "None" for related objects if it's allowed.
                        if rel_obj is None and field.null:
                            val = None
                else:
                    try:
                        val = kwargs.pop(field.attname)
                    except KeyError:
                        # This is done with an exception rather than the
                        # default argument on pop because we don't want
                        # get_default() to be evaluated, and then not used.
                        # Refs #12057.
                        val = field.get_default()
            else:
                val = field.get_default()
            if is_related_object:
                # If we are passed a related instance, set it using the
                # field.name instead of field.attname (e.g. "user" instead of
                # "user_id") so that the object gets properly cached (and type
                # checked) by the RelatedObjectDescriptor.
                setattr(self, field.name, rel_obj)
            else:
                setattr(self, field.attname, val)

        if kwargs:
            for prop in list(kwargs):
                try:
                    if isinstance(getattr(self.__class__, prop), property):
                        setattr(self, prop, kwargs.pop(prop))
                except AttributeError:
                    pass
            if kwargs:
                raise TypeError("'%s' is an invalid keyword argument for this function" % list(kwargs)[0])
        super(Model, self).__init__()
        signals.post_init.send(sender=self.__class__, instance=self)

    def __repr__(self):
        try:
            u = six.text_type(self)
        except (UnicodeEncodeError, UnicodeDecodeError):
            u = '[Bad Unicode data]'
        return smart_bytes('<%s: %s>' % (self.__class__.__name__, u))

    def __str__(self):
        if not six.PY3 and hasattr(self, '__unicode__'):
            return force_text(self).encode('utf-8')
        return '%s object' % self.__class__.__name__

    def __eq__(self, other):
        return isinstance(other, self.__class__) and self._get_pk_val() == other._get_pk_val()

    def __ne__(self, other):
        return not self.__eq__(other)

    def __hash__(self):
        return hash(self._get_pk_val())

    def __reduce__(self):
        """
        Provides pickling support. Normally, this just dispatches to Python's
        standard handling. However, for models with deferred field loading, we
        need to do things manually, as they're dynamically created classes and
        only module-level classes can be pickled by the default path.
        """
        if not self._deferred:
            return super(Model, self).__reduce__()
        data = self.__dict__
        defers = []
{'fraction_non_alphanumeric': 0.07357773005976251, 'fraction_numerical': 0.0007243939668331048, 'mean_word_length': 1.8040623866521581, 'pattern_counts': {'":': 2, '<': 5, '<?xml version=': 0, '>': 11, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 16, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '2192800', 'n_tokens_mistral': 10209, 'n_tokens_neox': 9773, 'n_words': 3140}