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📁 ..
📄 __init__.py(10.71 KB)
📄 __init__.pyc(12.61 KB)
📄 attributes.py(75.88 KB)
📄 attributes.pyc(70.33 KB)
📄 base.py(14.88 KB)
📄 base.pyc(15.27 KB)
📄 clsregistry.py(12.99 KB)
📄 clsregistry.pyc(15.24 KB)
📄 collections.py(53.44 KB)
📄 collections.pyc(63.92 KB)
📄 context.py(108.65 KB)
📄 context.pyc(63.05 KB)
📄 decl_api.py(34.72 KB)
📄 decl_api.pyc(37.65 KB)
📄 decl_base.py(43.69 KB)
📄 decl_base.pyc(30.85 KB)
📄 dependency.py(45.89 KB)
📄 dependency.pyc(29.02 KB)
📄 descriptor_props.py(25.38 KB)
📄 descriptor_props.pyc(28.08 KB)
📄 dynamic.py(15.64 KB)
📄 dynamic.pyc(16.76 KB)
📄 evaluator.py(7.76 KB)
📄 evaluator.pyc(10.77 KB)
📄 events.py(109.65 KB)
📄 events.pyc(117.72 KB)
📄 exc.py(6.38 KB)
📄 exc.pyc(8.27 KB)
📄 identity.py(7.06 KB)
📄 identity.pyc(10.35 KB)
📄 instrumentation.py(19.91 KB)
📄 instrumentation.pyc(22.7 KB)
📄 interfaces.py(31.59 KB)
📄 interfaces.pyc(37.42 KB)
📄 loading.py(48.16 KB)
📄 loading.pyc(29.21 KB)
📄 mapper.py(140.96 KB)
📄 mapper.pyc(108.91 KB)
📄 path_registry.py(16.01 KB)
📄 path_registry.pyc(18.51 KB)
📄 persistence.py(82.28 KB)
📄 persistence.pyc(49.3 KB)
📄 properties.py(14.44 KB)
📄 properties.pyc(15.03 KB)
📄 query.py(123 KB)
📄 query.pyc(121.3 KB)
📄 relationships.py(140.62 KB)
📄 relationships.pyc(116.6 KB)
📄 scoping.py(7.09 KB)
📄 scoping.pyc(7.46 KB)
📄 session.py(158.79 KB)
📄 session.pyc(144.25 KB)
📄 state.py(32.74 KB)
📄 state.pyc(32.94 KB)
📄 strategies.py(105.8 KB)
📄 strategies.pyc(67.54 KB)
📄 strategy_options.py(66.69 KB)
📄 strategy_options.pyc(59.79 KB)
📄 sync.py(5.69 KB)
📄 sync.pyc(4.68 KB)
📄 unitofwork.py(26.46 KB)
📄 unitofwork.pyc(25.77 KB)
📄 util.py(74.47 KB)
📄 util.pyc(70.69 KB)

Editing: sync.py

# orm/sync.py
# Copyright (C) 2005-2024 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: https://www.opensource.org/licenses/mit-license.php

"""private module containing functions used for copying data
between instances based on join conditions.

"""

from . import attributes
from . import exc
from . import util as orm_util
from .. import util

def populate(
    source,
    source_mapper,
    dest,
    dest_mapper,
    synchronize_pairs,
    uowcommit,
    flag_cascaded_pks,
):
    source_dict = source.dict
    dest_dict = dest.dict

for l, r in synchronize_pairs:
        try:
            # inline of source_mapper._get_state_attr_by_column
            prop = source_mapper._columntoproperty[l]
            value = source.manager[prop.key].impl.get(
                source, source_dict, attributes.PASSIVE_OFF
            )
        except exc.UnmappedColumnError as err:
            _raise_col_to_prop(False, source_mapper, l, dest_mapper, r, err)

try:
            # inline of dest_mapper._set_state_attr_by_column
            prop = dest_mapper._columntoproperty[r]
            dest.manager[prop.key].impl.set(dest, dest_dict, value, None)
        except exc.UnmappedColumnError as err:
            _raise_col_to_prop(True, source_mapper, l, dest_mapper, r, err)

# technically the "r.primary_key" check isn't
        # needed here, but we check for this condition to limit
        # how often this logic is invoked for memory/performance
        # reasons, since we only need this info for a primary key
        # destination.
        if (
            flag_cascaded_pks
            and l.primary_key
            and r.primary_key
            and r.references(l)
        ):
            uowcommit.attributes[("pk_cascaded", dest, r)] = True

def bulk_populate_inherit_keys(source_dict, source_mapper, synchronize_pairs):
    # a simplified version of populate() used by bulk insert mode
    for l, r in synchronize_pairs:
        try:
            prop = source_mapper._columntoproperty[l]
            value = source_dict[prop.key]
        except exc.UnmappedColumnError as err:
            _raise_col_to_prop(False, source_mapper, l, source_mapper, r, err)

try:
            prop = source_mapper._columntoproperty[r]
            source_dict[prop.key] = value
        except exc.UnmappedColumnError:
            _raise_col_to_prop(True, source_mapper, l, source_mapper, r)

def clear(dest, dest_mapper, synchronize_pairs):
    for l, r in synchronize_pairs:
        if (
            r.primary_key
            and dest_mapper._get_state_attr_by_column(dest, dest.dict, r)
            not in orm_util._none_set
        ):

raise AssertionError(
                "Dependency rule tried to blank-out primary key "
                "column '%s' on instance '%s'" % (r, orm_util.state_str(dest))
            )
        try:
            dest_mapper._set_state_attr_by_column(dest, dest.dict, r, None)
        except exc.UnmappedColumnError as err:
            _raise_col_to_prop(True, None, l, dest_mapper, r, err)

def update(source, source_mapper, dest, old_prefix, synchronize_pairs):
    for l, r in synchronize_pairs:
        try:
            oldvalue = source_mapper._get_committed_attr_by_column(
                source.obj(), l
            )
            value = source_mapper._get_state_attr_by_column(
                source, source.dict, l, passive=attributes.PASSIVE_OFF
            )
        except exc.UnmappedColumnError as err:
            _raise_col_to_prop(False, source_mapper, l, None, r, err)
        dest[r.key] = value
        dest[old_prefix + r.key] = oldvalue

def populate_dict(source, source_mapper, dict_, synchronize_pairs):
    for l, r in synchronize_pairs:
        try:
            value = source_mapper._get_state_attr_by_column(
                source, source.dict, l, passive=attributes.PASSIVE_OFF
            )
        except exc.UnmappedColumnError as err:
            _raise_col_to_prop(False, source_mapper, l, None, r, err)

dict_[r.key] = value

def source_modified(uowcommit, source, source_mapper, synchronize_pairs):
    """return true if the source object has changes from an old to a
    new value on the given synchronize pairs

"""
    for l, r in synchronize_pairs:
        try:
            prop = source_mapper._columntoproperty[l]
        except exc.UnmappedColumnError as err:
            _raise_col_to_prop(False, source_mapper, l, None, r, err)
        history = uowcommit.get_attribute_history(
            source, prop.key, attributes.PASSIVE_NO_INITIALIZE
        )
        if bool(history.deleted):
            return True
    else:
        return False

def _raise_col_to_prop(
    isdest, source_mapper, source_column, dest_mapper, dest_column, err
):
    if isdest:
        util.raise_(
            exc.UnmappedColumnError(
                "Can't execute sync rule for "
                "destination column '%s'; mapper '%s' does not map "
                "this column.  Try using an explicit `foreign_keys` "
                "collection which does not include this column (or use "
                "a viewonly=True relation)." % (dest_column, dest_mapper)
            ),
            replace_context=err,
        )
    else:
        util.raise_(
            exc.UnmappedColumnError(
                "Can't execute sync rule for "
                "source column '%s'; mapper '%s' does not map this "
                "column.  Try using an explicit `foreign_keys` "
                "collection which does not include destination column "
                "'%s' (or use a viewonly=True relation)."
                % (source_column, source_mapper, dest_column)
            ),
            replace_context=err,
        )

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