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@prashantgupta24 prashantgupta24 commented Aug 18, 2023

Try to fix #58

Getting the field number based on the len(field_descriptors) heavily relies on the fact that the fields are ordered.

In case he fields are annotated like this:

a: Str: 1
b: Union[x,y]: 3
c: 4
d: 2

then with the current logic, while determining the number for the 2 oneofs within b, one will get the number 2 len(field_descriptors) + oneof_field_idx and the other will get 3 len(field_descriptors) + oneof_field_idx (where len(field_descriptors) is an incorrect way of determining the number of fields that have already been handled).

Ideally, this can be just the field_number + oneof_field_idx, where we've already determined the field_number earlier?

Signed-off-by: Prashant Gupta <[email protected]>
Signed-off-by: Prashant Gupta <[email protected]>
Signed-off-by: Prashant Gupta <[email protected]>
Signed-off-by: Prashant Gupta <[email protected]>
class Foo:
bar: Annotated[bool, FieldNumber(1)]
foo: Union[bool, str]
baz: Annotated[bool, FieldNumber(2)]
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This fails with

[Couldn't build proto file into descriptor pool: duplicate field number (2)]

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Computed field numbers are messed up if fields are not ordered

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