Possibly buggy chaining of filters on ElementLists

[ewuerger]

I want to find a specific reqif.AttributeValue on a reqif.Requirement with a given definition.identifier. So I tried to do it in one go:

list(req.attributes.by_definition.by_identifier)
Traceback (most recent call last):
  File "/home/liyuanxin/wörk/rm-bridge/rm_bridge/changeset/change.py", line 801, in attribute_value_mod_action
    attr = req.attributes.by_definition.by_identifier(
  File "/home/liyuanxin/wörk/py-capellambse/capellambse/model/common/element.py", line 446, in __call__
    raise KeyError(values[0] if len(values) == 1 else values)
KeyError: 'Submitted at system_requirement'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/liyuanxin/wörk/py-capellambse/capellambse/model/common/element.py", line 463, in __iter__
    key = self.extract_key(elm)
  File "/home/liyuanxin/wörk/py-capellambse/capellambse/model/common/element.py", line 398, in extract_key
    value: U | enum.Enum | str = extractor(element)
  File "/home/liyuanxin/wörk/py-capellambse/capellambse/model/common/element.py", line 225, in __getattr__
    raise AttributeError(f"{attr} isn't defined on {type(self).__name__}")
AttributeError: by_identifier isn't defined on AttributeDefinition

I could get a matching reqif.AttributeDefinition before and then do it without chaining,... but that wouldn't be so awesome and would feel unmodern. What do you think @Wuestengecko?

[Wuestengecko]

I could get a matching reqif.AttributeDefinition before and then do it without chaining,... but that wouldn't be so awesome and would feel unmodern.

Ugh. The thought of it! Disgusting. I'll raise this to top priority.

req.attributes.by_definition.by_identifier

Almost :) You want to filter by the definition.identifier, so you need to call:

req.attributes.by_definition.identifier

The raised error (KeyError: 'Submitted at system_requirement') looks weird for the input code though. Are you sure you copy-pasted this correctly? If so, there might actually be a bug there.