+
+ ####################
+ # utility for handling relationships among the SFA objects
+ # given that the SFA db does not handle this sort of relationsships
+ # it will rely on side-effects in the testbed to keep this persistent
+
+ # subject_record describes the subject of the relationships
+ # ref_record contains the target values for the various relationships we need to manage
+ # (to begin with, this is just the slice x person relationship)
+ def update_relations (self, subject_record, ref_record):
+ type=subject_record['type']
+ if type=='slice':
+ self.update_relation(subject_record, 'researcher', ref_record.get('researcher'), 'user')
+
+ # field_key is the name of one field in the record, typically 'researcher' for a 'slice' record
+ # hrns is the list of hrns that should be linked to the subject from now on
+ # target_type would be e.g. 'user' in the 'slice' x 'researcher' example
+ def update_relation (self, sfa_record, field_key, hrns, target_type):
+ # locate the linked objects in our db
+ subject_type=sfa_record['type']
+ subject_id=sfa_record['pointer']
+ table = SfaTable()
+ link_sfa_records = table.find ({'type':target_type, 'hrn': hrns})
+ link_ids = [ rec.get('pointer') for rec in link_sfa_records ]
+ self.driver.update_relation (subject_type, target_type, subject_id, link_ids)