[2] | 1 | """ |
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| 2 | This migration script adds the request_event table and |
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| 3 | removes the state field in the request table |
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| 4 | """ |
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| 5 | from sqlalchemy import * |
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| 6 | from sqlalchemy.orm import * |
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| 7 | from sqlalchemy.exc import * |
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| 8 | from migrate import * |
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| 9 | from migrate.changeset import * |
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| 10 | |
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| 11 | import datetime |
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| 12 | now = datetime.datetime.utcnow |
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| 13 | |
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| 14 | import sys, logging |
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| 15 | log = logging.getLogger( __name__ ) |
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| 16 | log.setLevel(logging.DEBUG) |
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| 17 | handler = logging.StreamHandler( sys.stdout ) |
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| 18 | format = "%(name)s %(levelname)s %(asctime)s %(message)s" |
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| 19 | formatter = logging.Formatter( format ) |
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| 20 | handler.setFormatter( formatter ) |
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| 21 | log.addHandler( handler ) |
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| 22 | |
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| 23 | # Need our custom types, but don't import anything else from model |
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| 24 | from galaxy.model.custom_types import * |
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| 25 | |
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| 26 | metadata = MetaData( migrate_engine ) |
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| 27 | db_session = scoped_session( sessionmaker( bind=migrate_engine, autoflush=False, autocommit=True ) ) |
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| 28 | |
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| 29 | def display_migration_details(): |
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| 30 | print "========================================" |
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| 31 | print "This migration script adds the request_event table and" |
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| 32 | print "removes the state field in the request table" |
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| 33 | print "========================================" |
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| 34 | |
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| 35 | def localtimestamp(): |
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| 36 | if migrate_engine.name == 'postgres' or migrate_engine.name == 'mysql': |
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| 37 | return "LOCALTIMESTAMP" |
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| 38 | elif migrate_engine.name == 'sqlite': |
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| 39 | return "current_date || ' ' || current_time" |
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| 40 | else: |
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| 41 | raise Exception( 'Unable to convert data for unknown database type: %s' % db ) |
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| 42 | |
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| 43 | def nextval( table, col='id' ): |
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| 44 | if migrate_engine.name == 'postgres': |
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| 45 | return "nextval('%s_%s_seq')" % ( table, col ) |
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| 46 | elif migrate_engine.name == 'mysql' or migrate_engine.name == 'sqlite': |
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| 47 | return "null" |
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| 48 | else: |
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| 49 | raise Exception( 'Unable to convert data for unknown database type: %s' % migrate_engine.name ) |
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| 50 | |
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| 51 | |
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| 52 | RequestEvent_table = Table('request_event', metadata, |
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| 53 | Column( "id", Integer, primary_key=True), |
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| 54 | Column( "create_time", DateTime, default=now ), |
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| 55 | Column( "update_time", DateTime, default=now, onupdate=now ), |
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| 56 | Column( "request_id", Integer, ForeignKey( "request.id" ), index=True ), |
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| 57 | Column( "state", TrimmedString( 255 ), index=True ), |
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| 58 | Column( "comment", TEXT ) ) |
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| 59 | |
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| 60 | def upgrade(): |
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| 61 | display_migration_details() |
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| 62 | # Load existing tables |
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| 63 | metadata.reflect() |
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| 64 | # Add new request_event table |
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| 65 | try: |
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| 66 | RequestEvent_table.create() |
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| 67 | except Exception, e: |
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| 68 | log.debug( "Creating request_event table failed: %s" % str( e ) ) |
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| 69 | # move the current state of all existing requests to the request_event table |
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| 70 | cmd = \ |
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| 71 | "INSERT INTO request_event " + \ |
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| 72 | "SELECT %s AS id," + \ |
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| 73 | "%s AS create_time," + \ |
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| 74 | "%s AS update_time," + \ |
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| 75 | "request.id AS request_id," + \ |
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| 76 | "request.state AS state," + \ |
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| 77 | "'%s' AS comment " + \ |
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| 78 | "FROM request;" |
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| 79 | cmd = cmd % ( nextval('request_event'), localtimestamp(), localtimestamp(), 'Imported from request table') |
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| 80 | db_session.execute( cmd ) |
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| 81 | |
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| 82 | # Delete the state column |
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| 83 | try: |
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| 84 | Request_table = Table( "request", metadata, autoload=True ) |
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| 85 | except NoSuchTableError: |
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| 86 | Request_table = None |
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| 87 | log.debug( "Failed loading table request" ) |
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| 88 | if Request_table: |
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| 89 | try: |
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| 90 | Request_table.c.state.drop() |
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| 91 | except Exception, e: |
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| 92 | log.debug( "Deleting column 'state' to request table failed: %s" % ( str( e ) ) ) |
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| 93 | |
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| 94 | def downgrade(): |
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| 95 | pass |
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