<commit_before>from sqlalchemy.ext.declarative import declared_attr
from sqlalchemy.orm import mapper, class_mapper, attributes, object_mapper
from sqlalchemy.orm.exc import UnmappedClassError, UnmappedColumnError
from sqlalchemy import Table, Column, ForeignKeyConstraint, Integer
from sqlalchemy import event
from sqlalchemy.orm.properties import RelationshipProperty

def col_references_table(col, table):
    for fk in col.foreign_keys:
        if fk.references(table):
            return True
    return False

def _history_mapper(local_mapper):
    cls = local_mapper.class_

    # set the "active_history" flag
    # on on column-mapped attributes so that the old version
    # of the info is always loaded (currently sets it on all attributes)
    for prop in local_mapper.iterate_properties:
        getattr(local_mapper.class_, prop.key).impl.active_history = True

    super_mapper = local_mapper.inherits
    super_history_mapper = getattr(cls, '__history_mapper__', None)

    polymorphic_on = None
    super_fks = []

    if not super_mapper or local_mapper.local_table is not super_mapper.local_table:
        cols = []
        for column in local_mapper.local_table.c:
            if column.name == 'version':
                continue

            col = column.copy()
            col.unique = False

            if super_mapper and col_references_table(column, super_mapper.local_table):
                super_fks.append((col.key, list(super_history_mapper.local_table.primary_key)[0]))

            cols.append(col)

            if column is local_mapper.polymorphic_on:
                polymorphic_on = col

        if super_mapper:
            super_fks.append(('version', super_history_mapper.local_table.c.version))
            cols.append(Column('version', Integer, primary_key=True, autoincrement=False))
        else:
            cols.append(Column('version', Integer, primary_key=True, autoincrement=False))

        if super_fks:
            cols.append(ForeignKeyConstraint(*zip(*super_fks)))

        table = Table(local_mapper.local_table.name + '_history', local_mapper.local_table.metadata,
           *cols
        )
    else:
        # single table inheritance.  take any additional columns that may have
        # been added and add them to the history table.
        for column in local_mapper.local_table.c:
            if column.key not in super_history_mapper.local_table.c:
                col = column.copy()
                col.unique = False
                super_history_mapper.local_table.append_column(col)
        table = None

    if super_history_mapper:
        bases = (super_history_mapper.class_,)
    else:
        bases = local_mapper.base_mapper.class_.__bases__
    versioned_cls = type.__new__(type, "%sHistory" % cls.__name__, bases, {})

    m = mapper(
            versioned_cls,
            table,
            inherits=super_history_mapper,
            polymorphic_on=polymorphic_on,
            polymorphic_identity=local_mapper.polymorphic_identity
            )
    cls.__history_mapper__ = m

    if not super_history_mapper:
        local_mapper.local_table.append_column(
            Column('version', Integer, default=1, nullable=False)
        )
        local_mapper.add_property("version", local_mapper.local_table.c.version)


class Versioned(object):
    @declared_attr
    def __mapper_cls__(cls):
        def map(cls, *arg, **kw):
            mp = mapper(cls, *arg, **kw)
            _history_mapper(mp)
            return mp
        return map


def versioned_objects(iter):
    for obj in iter:
        if hasattr(obj, '__history_mapper__'):
            yield obj

def create_version(obj, session, deleted = False):
    obj_mapper = object_mapper(obj)
    history_mapper = obj.__history_mapper__
    history_cls = history_mapper.class_

    obj_state = attributes.instance_state(obj)

    attr = {}

    obj_changed = False

    for om, hm in zip(obj_mapper.iterate_to_root(), history_mapper.iterate_to_root()):
        if hm.single:
            continue

        for hist_col in hm.local_table.c:
            if hist_col.key == 'version':
                continue

            obj_col = om.local_table.c[hist_col.key]

            # get the value of the
            # attribute based on the MapperProperty related to the
            # mapped column.  this will allow usage of MapperProperties
            # that have a different keyname than that of the mapped column.
            try:<commit_msg>Added changed(timestamp) on _history table and supprot for schemas<commit_after>from sqlalchemy.ext.declarative import declared_attr
from sqlalchemy.orm import mapper, class_mapper, attributes, object_mapper
from sqlalchemy.orm.exc import UnmappedClassError, UnmappedColumnError
from sqlalchemy import Table, Column, ForeignKeyConstraint, Integer, DateTime
from sqlalchemy import event
from sqlalchemy.orm.properties import RelationshipProperty

def col_references_table(col, table):
    for fk in col.foreign_keys:
        if fk.references(table):
            return True
    return False

def _history_mapper(local_mapper):
    cls = local_mapper.class_

    # set the "active_history" flag
    # on on column-mapped attributes so that the old version
    # of the info is always loaded (currently sets it on all attributes)
    for prop in local_mapper.iterate_properties:
        getattr(local_mapper.class_, prop.key).impl.active_history = True

    super_mapper = local_mapper.inherits
    super_history_mapper = getattr(cls, '__history_mapper__', None)

    polymorphic_on = None
    super_fks = []

    if not super_mapper or local_mapper.local_table is not super_mapper.local_table:
        cols = []
        for column in local_mapper.local_table.c:
            if column.name == 'version':
                continue

            col = column.copy()
            col.unique = False

            if super_mapper and col_references_table(column, super_mapper.local_table):
                super_fks.append((col.key, list(super_history_mapper.local_table.primary_key)[0]))

            cols.append(col)

            if column is local_mapper.polymorphic_on:
                polymorphic_on = col

        if super_mapper:
            super_fks.append(('version', super_history_mapper.local_table.c.version))
            cols.append(Column('version', Integer, primary_key=True, autoincrement=False))
            cols.append(Column('changed', DateTime, default=datetime.datetime.now))
        else:
            cols.append(Column('version', Integer, primary_key=True, autoincrement=False))
            cols.append(Column('changed', DateTime, default=datetime.datetime.now))

        if super_fks:
            cols.append(ForeignKeyConstraint(*zip(*super_fks)))

        table = Table(local_mapper.local_table.name + '_history', local_mapper.local_table.metadata,
           *cols, schema=local_mapper.local_table.schema
        )
    else:
        # single table inheritance.  take any additional columns that may have
        # been added and add them to the history table.
        for column in local_mapper.local_table.c:
            if column.key not in super_history_mapper.local_table.c:
                col = column.copy()
                col.unique = False
                super_history_mapper.local_table.append_column(col)
        table = None

    if super_history_mapper:
        bases = (super_history_mapper.class_,)
    else:
        bases = local_mapper.base_mapper.class_.__bases__
    versioned_cls = type.__new__(type, "%sHistory" % cls.__name__, bases, {})

    m = mapper(
            versioned_cls,
            table,
            inherits=super_history_mapper,
            polymorphic_on=polymorphic_on,
            polymorphic_identity=local_mapper.polymorphic_identity
            )
    cls.__history_mapper__ = m

    if not super_history_mapper:
        local_mapper.local_table.append_column(
            Column('version', Integer, default=1, nullable=False)
        )
        local_mapper.add_property("version", local_mapper.local_table.c.version)


class Versioned(object):
    @declared_attr
    def __mapper_cls__(cls):
        def map(cls, *arg, **kw):
            mp = mapper(cls, *arg, **kw)
            _history_mapper(mp)
            return mp
        return map


def versioned_objects(iter):
    for obj in iter:
        if hasattr(obj, '__history_mapper__'):
            yield obj

def create_version(obj, session, deleted = False):
    obj_mapper = object_mapper(obj)
    history_mapper = obj.__history_mapper__
    history_cls = history_mapper.class_

    obj_state = attributes.instance_state(obj)

    attr = {}

    obj_changed = False

    for om, hm in zip(obj_mapper.iterate_to_root(), history_mapper.iterate_to_root()):
        if hm.single:
            continue

        for hist_col in hm.local_table.c:
            if hist_col.key == 'version' or hist_col.key == 'changed':
                continue

            obj_col = om.local_table.c[hist_col.key]

            # get the value of the
            # attribute based on the MapperProperty related to the
            # mapped column.  this will allow usage of MapperProperties
            # that have a different keyname than that of the mapped column.
            try:
{'fraction_non_alphanumeric': 0.07807093425605537, 'fraction_numerical': 0.00043252595155709344, 'mean_word_length': 2.5876648564778897, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 3, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '2213897', 'n_tokens_mistral': 2780, 'n_tokens_neox': 2677, 'n_words': 636}