Return multiple validation errors at once

Not sure if it’s possible, but it would be useful if you could get a list of e.g. ValueErrors, rather than just the first one that failed when there are multiple issues. It would make typical much more useful for validation purposes.

Perhaps it could be configured somehow which behavior you want, since there could be a performance hit, I suppose.

Example:

>>> @typic.al
... @dataclass
... class N:
...   a: str
...   b: int
...   c: int
... 
>>> N(a="a", b="a", c="b")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 3, in __init__
  File "../typic/api.py", line 143, in __setattr_coerced__
    value = ann[name](value) if name in ann else value
  File "../typic/coercer.py", line 117, in coerce
    return self.coercer(value)
  File "<string>", line 3, in coerce__class_int___class_inspect__empty__False
ValueError: invalid literal for int() with base 10: 'a'

[seandstewart]

You read my mind. It’s a bit of expansion in scope for the constraints validator, but work is ongoing in the v2beta-validator branch to provide “strict” validation of inputs automatically.

[seandstewart]

@syastrov -

Thanks for the honesty there. Error-chaining should be possible.

I’d put it at a medium-heavy lift, as the current system is really designed to short-circuit ASAP with an informative error. It’s not impossible to add a branch for this, but definitely a day or two’s worth of work, which is why I’m scheduling it for 2.1.