PandABlocks-client raises error when using PandA3.1 (b1) firmware

[tomtrafford]

I have recently updated the Firmware on BL20J-TS-PANDA-01 (172.23.90.24) to 3.1b1 and it produces the following error:

pandablocks-ioc softioc BL20J-TS-PANDA-01 BL20J-EA-PANDA-01
INFO: PVXS QSRV2 is loaded, permitted, and ENABLED.
Traceback (most recent call last):
  File "/dls/science/users/ysx26594/venvs/pandaIoc/bin/pandablocks-ioc", line 8, in <module>
    sys.exit(cli())
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/click/core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/click/core.py", line 1078, in main
    rv = self.invoke(ctx)
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/click/core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/click/core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks_ioc/__main__.py", line 62, in softioc
    create_softioc(
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks_ioc/ioc.py", line 163, in create_softioc
    ).result()
  File "/dls_sw/apps/python/miniforge/4.10.0-0/envs/python3.10/lib/python3.10/concurrent/futures/_base.py", line 458, in result
    return self.__get_result()
  File "/dls_sw/apps/python/miniforge/4.10.0-0/envs/python3.10/lib/python3.10/concurrent/futures/_base.py", line 403, in __get_result
    raise self._exception
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks_ioc/ioc.py", line 107, in _create_softioc
    (all_records, all_values_dict, block_info_dict) = await create_records(
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks_ioc/ioc.py", line 1885, in create_records
    (panda_dict, all_values_dict) = await introspect_panda(client)
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks_ioc/ioc.py", line 204, in introspect_panda
    returned_infos = await asyncio.gather(
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks/asyncio.py", line 140, in send
    raise response
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks/connections.py", line 164, in _update_contexts
    exchanges = next(context.generator)
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks/commands.py", line 728, in execute
    field_name_info = yield from _zip_with_return(field_generators)
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks/commands.py", line 143, in _zip_with_return
    exchanges = next(gen)
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks/commands.py", line 513, in _time
    desc, units, min = yield from _execute_commands(
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks/commands.py", line 126, in _execute_commands
    ret = yield from _zip_with_return([command.execute() for command in commands])
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks/commands.py", line 143, in _zip_with_return
    exchanges = next(gen)
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks/commands.py", line 232, in execute
    return ex.line
  File "/dls/science/users/ysx26594/venvs/pandaIoc/lib/python3.10/site-packages/pandablocks/_exchange.py", line 30, in line
    assert not self.is_multiline and self.received[0].startswith(
pandablocks.commands.CommandException: GetFieldInfo(block='PULSE', extended_metadata=True) raised error:
AssertionError: 'PULSE1.DELAY.MIN?' -> 'ERR No such attribute'

The MIN attribute of Time fields has been removed between 3.0 and 3.1b1 which might be causing this error: PandABlocks/PandABlocks-server#55

[coretl]

Fix is to remove this line:

PandABlocks-client/src/pandablocks/commands.py

Line 516 in aa2eb1a

GetLine(f"{self.block}1.{field_name}.MIN"),

and the corresponding field in TimeFieldInfo:

PandABlocks-client/src/pandablocks/responses.py

Line 93 in aa2eb1a

min_val: float