[req] drop from_controller on non WebRequest object (Closes #2901079)
The `controller` concept is purely a web things. It does not belong to generic
`req` object.
The `build_url` code is slightly changed to handle that. This probably requires
extended cleanup later.
This is a barely used and very internal API. No deprecation period
from yams import schema2sql as y2sql
dbhelper = repo.system_source.dbhelper
rdefdef = schema['CWSource'].rdef('name')
attrtype = y2sql.type_from_constraints(dbhelper, rdefdef.object, rdefdef.constraints).split()[0]
cursor = session.cnxset['system']
sql('UPDATE entities SET asource = source WHERE asource is NULL')
dbhelper.change_col_type(cursor, 'entities', 'asource', attrtype, False)
dbhelper.change_col_type(cursor, 'entities', 'source', attrtype, False)
dbhelper.change_col_type(cursor, 'deleted_entities', 'source', attrtype, False)