Open scottee opened 1 month ago
Can you paste in the exact exception that sometimes flies out? Maybe it'll help.
From your snippets I'm also going to assume you're using include_subclasses
too? Otherwise that structure call would always just return BaseClass
.
I'll add the exact exception when I can recreate it.
And yes, I am using include_subclasses
.
Here is the exception that results periodically from this issues:
| Exception Group Traceback (most recent call last):
| File "", line 5, in structure_mapping
| File "/opt/homebrew/Caskroom/mambaforge/base/lib/python3.10/site-packages/cattrs/strategies/_subclasses.py", line 125, in struct_hook
| return _base_hook(val, _cl)
| File "<cattrs generated structure blah.BaseClass>", line 91, in structure_BaseClass
| if errors: raise __c_cve('While structuring ' + 'BaseClass', errors, __cl)
| cattrs.errors.ClassValidationError: While structuring BaseClass (1 sub-exception)
| Structuring mapping value @ key 'arg1'
+-+---------------- 1 ----------------
| cattrs.errors.ForbiddenExtraKeysError: Extra fields in constructor for BaseClass: other_arg1, arg1, other_arg2
+------------------------------------
Description
I have a set of classes that all inherit from one base class. I have one class that has a unique required attribute to differentiate it defined like this:
I have a unit test which tries to structure json with this BadSubClass. About half the time I get an exception that the BaseClass deserializing got extra keys (the keys of BadSubClass). Well I say half the time, but now that I'm trying to recreate the error, it won't throw the error. (You might say I'm just crazy. You'd be right, but not for this reason.)
The question is, Has anyone seen this disambiguating problem, especially when it is transient like this?
What I Did
Test case looks like this: