Issue with IOC startup (handling tables)

[dmgav]

The IOC fails to start with the following error message:

PandABlocks-ioc/src/pandablocks_ioc/_tables.py

Line 387 in 35360f4

initial_value=field_details.labels.index(initial_value),

Below is the traceback. I inserted some helpful print statements in the code, so the line numbers in _table.py are shifted by 3.

field_details=TableFieldDetails(subtype='enum', bit_low=16, bit_high=19, description='The trigger condition to start the phases ', labels=['Immediate', 'BITA=0', 'BITA=1', 'BITB=0', 'BITB=1', 'BITC=0', 'BITC=1', 'POSA>=POSITION', 'POSA<=POSITION', 'POSB>=POSITION', 'POSB<=POSITION', 'POSC>=POSITION', 'POSC<=POSITION'])
field_details.labels = ['Immediate', 'BITA=0', 'BITA=1', 'BITB=0', 'BITB=1', 'BITC=0', 'BITC=1', 'POSA>=POSITION', 'POSA<=POSITION', 'POSB>=POSITION', 'POSB<=POSITION', 'POSC>=POSITION', 'POSC<=POSITION']
type(labels) = <class 'list'>
ERROR:Exception while initializing softioc
Traceback (most recent call last):
  File "/nsls2/users/dgavrilov/repos/PandABlocks-ioc/src/pandablocks_ioc/ioc.py", line 145, in create_softioc
    ).result()
  File "/nsls2/users/dgavrilov/conda_envs/2023-2.1-py310-tiled-panda/lib/python3.10/concurrent/futures/_base.py", line 458, in result
    return self.__get_result()
  File "/nsls2/users/dgavrilov/conda_envs/2023-2.1-py310-tiled-panda/lib/python3.10/concurrent/futures/_base.py", line 403, in __get_result
    raise self._exception
  File "/nsls2/users/dgavrilov/repos/PandABlocks-ioc/src/pandablocks_ioc/ioc.py", line 99, in _create_softioc
    (all_records, all_values_dict, block_info_dict) = await create_records(
  File "/nsls2/users/dgavrilov/repos/PandABlocks-ioc/src/pandablocks_ioc/ioc.py", line 1818, in create_records
    records = record_factory.create_record(
  File "/nsls2/users/dgavrilov/repos/PandABlocks-ioc/src/pandablocks_ioc/ioc.py", line 1607, in create_record
    return self._make_table(record_name, field_info, list_vals)
  File "/nsls2/users/dgavrilov/repos/PandABlocks-ioc/src/pandablocks_ioc/ioc.py", line 1114, in _make_table
    table_updater = TableUpdater(
  File "/nsls2/users/dgavrilov/repos/PandABlocks-ioc/src/pandablocks_ioc/_tables.py", line 390, in __init__
    initial_value=field_details.labels.index(initial_value),
ValueError: 0 is not in list

[dmgav]

The error happens while processing SEQ2 module, which has an empty table. The exception is raised for TRIGGER column of the table.

INFO:Description for SEQ2:TABLE:TRIGGER longer than EPICS limit of 40 characters. It will be truncated. Description: The trigger condition to start the phases 
field_name=TRIGGER
field_data={'REPEATS': array([], dtype=uint32), 'TRIGGER': [], 'POSITION': array([], dtype=int64), 'TIME1': array([], dtype=uint32), 'OUTA1': array([], dtype=uint32), 'OUTB1': array([], dtype=uint32), 'OUTC1': array([], dtype=uint32), 'OUTD1': array([], dtype=uint32), 'OUTE1': array([], dtype=uint32), 'OUTF1': array([], dtype=uint32), 'TIME2': array([], dtype=uint32), 'OUTA2': array([], dtype=uint32), 'OUTB2': array([], dtype=uint32), 'OUTC2': array([], dtype=uint32), 'OUTD2': array([], dtype=uint32), 'OUTE2': array([], dtype=uint32), 'OUTF2': array([], dtype=uint32)}
len(field_data[field_name])=0
field_details=TableFieldDetails(subtype='enum', bit_low=16, bit_high=19, description='The trigger condition to start the phases ', labels=['Immediate', 'BITA=0', 'BITA=1', 'BITB=0', 'BITB=1', 'BITC=0', 'BITC=1', 'POSA>=POSITION', 'POSA<=POSITION', 'POSB>=POSITION', 'POSB<=POSITION', 'POSC>=POSITION', 'POSC<=POSITION'])
field_details.labels = ['Immediate', 'BITA=0', 'BITA=1', 'BITB=0', 'BITB=1', 'BITC=0', 'BITC=1', 'POSA>=POSITION', 'POSA<=POSITION', 'POSB>=POSITION', 'POSB<=POSITION', 'POSC>=POSITION', 'POSC<=POSITION']
type(labels) = <class 'list'>
ERROR:Exception while initializing softioc