A result can not be added to a workflow if a parameter exists with the same name (SQLA)

[szoupanos]

E.g.

In [11]: w2=load_workflow(2)
In [44]: s2=StructureData()

In [45]: s2
Out[45]: <StructureData: uuid: 780f3af8-77e7-4cec-a711-c8eb7e4b76ef (unstored)>

In [46]: s2.store()
Out[46]: <StructureData: uuid: 780f3af8-77e7-4cec-a711-c8eb7e4b76ef (pk: 787)>

In [47]: w2.add_result('structure',s2)

In [48]: w2.get_results()
Out[48]: {u'params': <ParameterData: uuid: bf245765-f5b5-414d-a038-67a79be5854d (pk: 785)>}

In [49]: w2.add_result('structure2',s2)

In [50]: w2.get_results()
Out[50]:
{u'params': <ParameterData: uuid: bf245765-f5b5-414d-a038-67a79be5854d (pk: 785)>,
 u'structure2': <StructureData: uuid: 780f3af8-77e7-4cec-a711-c8eb7e4b76ef (pk: 787)>}
In [51]: w2.get_attributes()
Out[51]:
{u'submission_has_failed': False,
 u'update_calculation_set': {u'max_wallclock_seconds': 86400,
  u'resources': {u'num_machines': 1, u'num_mpiprocs_per_machine': 16}},
 u'update_parameters': {u'CONTROL': {u'max_seconds': 74193}},
 u'update_settings': {u'cmdline': [u'-nk', u'16']}}

In [52]: w2.get_parameters()
Out[52]:
{u'band_calculation_set': {},
 u'band_group_name': u'bands_finished_pw_kpts_dist_0p2_smear_cold_psfam_SSSPv0p7effPBE_volthr_0p01_calc_vc-relax_deg_0p02',
 u'band_input': {u'automatic_parallelization': {u'max_num_machines': 1,
   u'max_wall_time_seconds': 86400},
  u'distance_kpoints_in_dispersion': 0.01},
 u'band_parameters_update': {u'ELECTRONS': {u'conv_thr': 4e-09,
   u'diagonalization': u'cg'}},
 u'calculation_set': {},
 u'codename': u'pw-5.2.0',
 u'group_name': u'pw_finished_pw_kpts_dist_0p2_smear_cold_psfam_SSSPv0p7effPBE_volthr_0p01_calc_vc-relax_deg_0p02',
 u'input': {u'automatic_parallelization': {u'max_num_machines': 1,
   u'max_wall_time_seconds': 86400,
   u'target_time_seconds': 28800},
  u'clean_workdir': True,
  u'distance_kpoints_in_mesh': 0.2,
  u'finish_with_scf': False,
  u'relaxation_scheme': u'vc-relax',
  u'volume_convergence_threshold': 0.01},
 u'kpoints': <KpointsData: uuid: 7b521778-f4a9-4231-ae5f-8f3b58d80746 (pk: 715)>,
 u'parameters': {u'ELECTRONS': {u'conv_thr': 8e-11, u'electron_maxstep': 100},
  u'SYSTEM': {u'degauss': 0.02,
   u'ecutrho': 840.0,
   u'ecutwfc': 70.0,
   u'occupations': u'smearing',
   u'smearing': u'cold'}},
 u'pseudo_family': u'SSSP_v0.7_eff_PBE',
 u'structure': <StructureData: uuid: 780f3af8-77e7-4cec-a711-c8eb7e4b76ef (pk: 787)>}

In [53]: w2.add_result('pseudo_family',s2)

In [54]: w2.get_results()
Out[54]:
{u'params': <ParameterData: uuid: bf245765-f5b5-414d-a038-67a79be5854d (pk: 785)>,
 u'structure2': <StructureData: uuid: 780f3af8-77e7-4cec-a711-c8eb7e4b76ef (pk: 787)>}

[szoupanos]

Fixed by #962