[session] drop useless getter and setter for security
Those function have very few user and does not anything fancy. Internal user now
access tx.read/write_security directly. External user have been blessed with a
writable property. They are only interested in the write part of they did not
used the return of the removed function. They access it through the session
since I prefer the external world to not be aware of Transaction yet.
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)