Comments (6)
jmcarp
commented on May 17, 2024
1
Meh. Can I not pass missing as None? Seems to raise an error.
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sloria
commented on May 17, 2024
Try using the missing argument instead of default. missing defines the deserialization value when the input is missing.
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sloria
commented on May 17, 2024
Yeah, the less-than-ideal naming comes from the fact that marshmallow fields can have different default values for deserialization vs. serialization.
The missing value still gets validated, so you will need to set allow_none=True. Perhaps this is a usability bug in marshmallow; it might make sense to set allow_none=True implicitly if missing=None.
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jmcarp
commented on May 17, 2024
👍 to (considering) that API change on marshmallow. Thanks @sloria!
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sloria
commented on May 17, 2024
The above change is made in marshmallow 2.1.0.
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jmcarp
commented on May 17, 2024
Like!
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