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Location: kallithea/rhodecode/lib/dbmigrate/migrate/changeset/databases/visitor.py - annotation
ff3f10a6a203
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text/x-python
pullrequest: just replace children of other_ref when other_repo changes
We were inserting a full select statement as innerHTML of a select and would
thus get nested select statements. IE did not render that correctly ... and
other browsers did strange things.
Instead we now create a in memory DOM object and move the optgroups. After
appending children to the selector we have to set selectedIndex on all
browsers.
We were inserting a full select statement as innerHTML of a select and would
thus get nested select statements. IE did not render that correctly ... and
other browsers did strange things.
Instead we now create a in memory DOM object and move the optgroups. After
appending children to the selector we have to set selectedIndex on all
browsers.
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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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