--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/migration/3.18.0_Any.py Fri Aug 23 15:06:27 2013 +0200
@@ -0,0 +1,60 @@
+sync_schema_props_perms('defaultval')
+
+def convert_defaultval(cwattr, default):
+ from decimal import Decimal
+ import yams
+ from cubicweb import Binary
+ if default is None:
+ return
+ atype = cwattr.to_entity[0].name
+ if atype == 'Boolean':
+ assert default in ('True', 'False'), default
+ default = default == 'True'
+ elif atype in ('Int', 'BigInt'):
+ default = int(default)
+ elif atype == 'Float':
+ default = float(default)
+ elif atype == 'Decimal':
+ default = Decimal(default)
+ elif atype in ('Date', 'Datetime', 'TZDatetime', 'Time'):
+ try:
+ # handle NOW and TODAY, keep them stored as strings
+ yams.KEYWORD_MAP[atype][default.upper()]
+ default = default.upper()
+ except KeyError:
+ # otherwise get an actual date or datetime
+ default = yams.DATE_FACTORY_MAP[atype](default)
+ else:
+ assert atype == 'String', atype
+ default = unicode(default)
+ return Binary.zpickle(default)
+
+dbh = repo.system_source.dbhelper
+driver = config.sources()['system']['db-driver']
+if driver == 'postgres' or driver.startswith('sqlserver'):
+ sql('ALTER TABLE cw_cwattribute ADD new_defaultval %s' % dbh.TYPE_MAPPING['Bytes'])
+else:
+ assert False, 'upgrade not supported on this database backend'
+
+for cwattr in rql('CWAttribute X').entities():
+ olddefault = cwattr.defaultval
+ if olddefault is not None:
+ req = "UPDATE cw_cwattribute SET new_defaultval = %(val)s WHERE cw_eid = %(eid)s"
+ args = {'val': dbh.binary_value(convert_defaultval(cwattr, olddefault).getvalue()), 'eid': cwattr.eid}
+ sql(req, args, ask_confirm=False)
+
+sql('ALTER TABLE cw_cwattribute DROP COLUMN cw_defaultval')
+if config.sources()['system']['db-driver'] == 'postgres':
+ sql('ALTER TABLE cw_cwattribute RENAME COLUMN new_defaultval TO cw_defaultval')
+else:
+ sql("sp_rename 'cw_cwattribute.new_defaultval', 'cw_defaultval', 'COLUMN'")
+
+# Set object type to "Bytes" for CWAttribute's "defaultval" attribute
+rql('SET X to_entity B WHERE X is CWAttribute, X from_entity Y, Y name "CWAttribute", '
+ 'X relation_type Z, Z name "defaultval", B name "Bytes"')
+
+from yams import buildobjs as ybo
+schema.add_relation_def(ybo.RelationDefinition('CWAttribute', 'defaultval', 'Bytes'))
+schema.del_relation_def('CWAttribute', 'defaultval', 'String')
+
+commit()