[web/views] fix editcontroller regression unittest_views_basecontrollers.py's EditControllerTC.test_edit_mandatory_inlined3_object regressed with changeset dcbb64d3a1d9 because it relied on POSTing nonexisting eids. This seems like a silly idea, but let's keep the behaviour unchanged.

if repo.system_source.dbdriver == 'postgres':
    sql('ALTER TABLE appears ADD COLUMN weight float')
    sql('UPDATE appears SET weight=1.0 ')