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Location: kallithea/rhodecode/lib/dbmigrate/migrate/changeset/databases/visitor.py - annotation
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User create/delete hooks for rcextensions.
When a user is created or deleted, the CREATE_USER_HOOK or DELETE_USER_HOOK
are called as part of the log_create_user and log_delete_user functions
respectively. This is similar to the existing log_create_repository and
log_delete_repository functions that already exist as part of the rcextensions
module.
When a user is created or deleted, the CREATE_USER_HOOK or DELETE_USER_HOOK
are called as part of the log_create_user and log_delete_user functions
respectively. This is similar to the existing log_create_repository and
log_delete_repository functions that already exist as part of the rcextensions
module.
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Module for visitor class mapping.
"""
import sqlalchemy as sa
from rhodecode.lib.dbmigrate.migrate.changeset import ansisql
from rhodecode.lib.dbmigrate.migrate.changeset.databases import (sqlite,
postgres,
mysql,
oracle,
firebird)
# Map SA dialects to the corresponding Migrate extensions
DIALECTS = {
"default": ansisql.ANSIDialect,
"sqlite": sqlite.SQLiteDialect,
"postgres": postgres.PGDialect,
"postgresql": postgres.PGDialect,
"mysql": mysql.MySQLDialect,
"oracle": oracle.OracleDialect,
"firebird": firebird.FBDialect,
}
def get_engine_visitor(engine, name):
"""
Get the visitor implementation for the given database engine.
:param engine: SQLAlchemy Engine
:param name: Name of the visitor
:type name: string
:type engine: Engine
:returns: visitor
"""
# TODO: link to supported visitors
return get_dialect_visitor(engine.dialect, name)
def get_dialect_visitor(sa_dialect, name):
"""
Get the visitor implementation for the given dialect.
Finds the visitor implementation based on the dialect class and
returns and instance initialized with the given name.
Binds dialect specific preparer to visitor.
"""
# map sa dialect to migrate dialect and return visitor
sa_dialect_name = getattr(sa_dialect, 'name', 'default')
migrate_dialect_cls = DIALECTS[sa_dialect_name]
visitor = getattr(migrate_dialect_cls, name)
# bind preparer
visitor.preparer = sa_dialect.preparer(sa_dialect)
return visitor
def run_single_visitor(engine, visitorcallable, element,
connection=None, **kwargs):
"""Taken from :meth:`sqlalchemy.engine.base.Engine._run_single_visitor`
with support for migrate visitors.
"""
if connection is None:
conn = engine.contextual_connect(close_with_result=False)
else:
conn = connection
visitor = visitorcallable(engine.dialect, conn)
try:
if hasattr(element, '__migrate_visit_name__'):
fn = getattr(visitor, 'visit_' + element.__migrate_visit_name__)
else:
fn = getattr(visitor, 'visit_' + element.__visit_name__)
fn(element, **kwargs)
finally:
if connection is None:
conn.close()
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