[2] | 1 | """ |
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| 2 | Migration script to modify the 'notify' field in the 'request' table from a boolean |
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| 3 | to a JSONType |
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| 4 | """ |
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| 5 | |
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| 6 | from sqlalchemy import * |
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| 7 | from sqlalchemy.orm import * |
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| 8 | from migrate import * |
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| 9 | from migrate.changeset import * |
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| 10 | from sqlalchemy.exc import * |
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| 11 | |
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| 12 | from galaxy.model.custom_types import * |
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| 13 | from galaxy.util.json import from_json_string, to_json_string |
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| 14 | |
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| 15 | import datetime |
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| 16 | now = datetime.datetime.utcnow |
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| 17 | |
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| 18 | import logging |
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| 19 | log = logging.getLogger( __name__ ) |
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| 20 | |
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| 21 | metadata = MetaData( migrate_engine ) |
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| 22 | db_session = scoped_session( sessionmaker( bind=migrate_engine, autoflush=False, autocommit=True ) ) |
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| 23 | |
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| 24 | |
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| 25 | def upgrade(): |
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| 26 | print __doc__ |
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| 27 | metadata.reflect() |
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| 28 | try: |
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| 29 | Request_table = Table( "request", metadata, autoload=True ) |
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| 30 | except NoSuchTableError, e: |
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| 31 | Request_table = None |
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| 32 | log.debug( "Failed loading table 'request'" ) |
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| 33 | |
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| 34 | |
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| 35 | if Request_table: |
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| 36 | # create the column again as JSONType |
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| 37 | try: |
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| 38 | col = Column( "notification", JSONType() ) |
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| 39 | col.create( Request_table ) |
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| 40 | assert col is Request_table.c.notification |
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| 41 | except Exception, e: |
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| 42 | log.debug( "Creating column 'notification' in the 'request' table failed: %s" % ( str( e ) ) ) |
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| 43 | |
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| 44 | cmd = "SELECT id, user_id, notify FROM request" |
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| 45 | result = db_session.execute( cmd ) |
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| 46 | for r in result: |
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| 47 | id = int(r[0]) |
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| 48 | notify_old = r[1] |
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| 49 | notify_new = dict(email=[], sample_states=[], body='', subject='') |
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| 50 | cmd = "update request set notification='%s' where id=%i" % (to_json_string(notify_new), id) |
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| 51 | db_session.execute( cmd ) |
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| 52 | |
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| 53 | cmd = "SELECT id, notification FROM request" |
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| 54 | result = db_session.execute( cmd ) |
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| 55 | for r in result: |
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| 56 | rr = from_json_string(str(r[1])) |
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| 57 | |
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| 58 | # remove the 'notify' column |
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| 59 | try: |
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| 60 | Request_table.c.notify.drop() |
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| 61 | except Exception, e: |
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| 62 | log.debug( "Deleting column 'notify' from the 'request' table failed: %s" % ( str( e ) ) ) |
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| 63 | |
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| 64 | |
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| 65 | |
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| 66 | def downgrade(): |
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| 67 | pass |
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