Migration script to handle mysql index error in previous migration script ( 0015_tagging.py )

2026-09-24 16:30:27 +08:00 · 2009-08-28 13:13:18 -04:00
parent 5789b18205
commit d7a03208f0
1 changed files with 51 additions and 0 deletions
@@ -0,0 +1,51 @@
+"""
+This script fixes a problem introduced in 0015_tagging.py. MySQL has a name length
+limit and thus the index "ix_hda_ta_history_dataset_association_id" has to be
+manually created.
+"""
+
+from sqlalchemy import *
+from migrate import *
+
+import datetime
+now = datetime.datetime.utcnow
+
+# Need our custom types, but don't import anything else from model
+from galaxy.model.custom_types import *
+
+import logging
+log = logging.getLogger( __name__ )
+
+metadata = MetaData( migrate_engine )
+
+def display_migration_details():
+    print ""
+    print "This script fixes a problem introduced in 0015_tagging.py.  MySQL has a"
+    print "name length limit and thus the index 'ix_hda_ta_history_dataset_association_id'"
+    print "has to be manually created."
+    
+HistoryDatasetAssociationTagAssociation_table = Table( "history_dataset_association_tag_association", metadata,
+    Column( "history_dataset_association_id", Integer, ForeignKey( "history_dataset_association.id" ), index=True ),
+    Column( "tag_id", Integer, ForeignKey( "tag.id" ), index=True ),
+    Column( "user_tname", TrimmedString(255), index=True),
+    Column( "value", TrimmedString(255), index=True),
+    Column( "user_value", TrimmedString(255), index=True) )
+
+def upgrade():
+    display_migration_details()
+    metadata.reflect()
+    i = Index( "ix_hda_ta_history_dataset_association_id", HistoryDatasetAssociationTagAssociation_table.c.history_dataset_association_id )
+    try:
+        i.create()
+    except Exception, e:
+        print str(e)
+        log.debug( "Adding index 'ix_hdata_history_dataset_association_id' to table 'history_dataset_association_tag_association' table failed: %s" % str( e ) )
+    
+def downgrade():
+    metadata.reflect()
+    i = Index( "ix_hda_ta_history_dataset_association_id", HistoryDatasetAssociationTagAssociation_table.c.history_dataset_association_id )
+    try:
+        i.drop()
+    except Exception, e:
+        print str(e)
+        log.debug( "Removing index 'ix_hdata_history_dataset_association_id' to table 'history_dataset_association_tag_association' table failed: %s" % str( e ) )