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workaround for https://github.com/kvesteri/sqlalchemy-continuum/issues/264
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2 changed files with 100 additions and 0 deletions
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@ -21,6 +21,7 @@ from sqlalchemy_continuum.plugins import FlaskPlugin
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from werkzeug.security import generate_password_hash
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from ihatemoney.currency_convertor import CurrencyConverter
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from ihatemoney.monkeypath_continuum import PatchedTransactionFactory
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from ihatemoney.utils import get_members, same_bill
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from ihatemoney.versioning import (
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ConditionalVersioningManager,
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@ -35,6 +36,8 @@ make_versioned(
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# Conditionally Disable the versioning based on each
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# project's privacy preferences
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tracking_predicate=version_privacy_predicate,
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# MonkeyPatching
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transaction_cls=PatchedTransactionFactory(),
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),
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plugins=[
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FlaskPlugin(
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97
ihatemoney/monkeypath_continuum.py
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97
ihatemoney/monkeypath_continuum.py
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@ -0,0 +1,97 @@
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from collections import OrderedDict
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import six
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import sqlalchemy as sa
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from sqlalchemy_continuum import __version__ as continuum_version
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from sqlalchemy_continuum.exc import ImproperlyConfigured
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from sqlalchemy_continuum.transaction import (
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TransactionBase,
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TransactionFactory,
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create_triggers,
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)
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if continuum_version != "1.3.14":
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import warnings
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warnings.warn(
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"SQLAlchemy-continuum version changed. Please check monkeypatching usefulness."
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)
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class PatchedTransactionFactory(TransactionFactory):
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"""
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Monkeypatching TransactionFactory for
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https://github.com/kvesteri/sqlalchemy-continuum/issues/264
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There is no easy way to really remove Sequence without redefining the whole method. So,
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this is a copy/paste. :/
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"""
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def create_class(self, manager):
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"""
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Create Transaction class.
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"""
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class Transaction(manager.declarative_base, TransactionBase):
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__tablename__ = "transaction"
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__versioning_manager__ = manager
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id = sa.Column(
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sa.types.BigInteger,
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# sa.schema.Sequence('transaction_id_seq'),
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primary_key=True,
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autoincrement=True,
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)
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if self.remote_addr:
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remote_addr = sa.Column(sa.String(50))
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if manager.user_cls:
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user_cls = manager.user_cls
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Base = manager.declarative_base
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try:
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registry = Base.registry._class_registry
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except AttributeError: # SQLAlchemy < 1.4
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registry = Base._decl_class_registry
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if isinstance(user_cls, six.string_types):
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try:
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user_cls = registry[user_cls]
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except KeyError:
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raise ImproperlyConfigured(
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"Could not build relationship between Transaction"
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" and %s. %s was not found in declarative class "
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"registry. Either configure VersioningManager to "
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"use different user class or disable this "
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"relationship " % (user_cls, user_cls)
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)
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user_id = sa.Column(
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sa.inspect(user_cls).primary_key[0].type,
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sa.ForeignKey(sa.inspect(user_cls).primary_key[0]),
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index=True,
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)
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user = sa.orm.relationship(user_cls)
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def __repr__(self):
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fields = ["id", "issued_at", "user"]
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field_values = OrderedDict(
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(field, getattr(self, field))
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for field in fields
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if hasattr(self, field)
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)
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return "<Transaction %s>" % ", ".join(
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(
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"%s=%r" % (field, value)
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if not isinstance(value, six.integer_types)
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# We want the following line to ensure that longs get
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# shown without the ugly L suffix on python 2.x
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# versions
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else "%s=%d" % (field, value)
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for field, value in field_values.items()
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)
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)
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if manager.options["native_versioning"]:
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create_triggers(Transaction)
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return Transaction
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