Module double_option 

Double-Option (de)serialization for PATCH semantics.

JSON	Rust
field absent	None (leave unchanged)
"field": null	Some(None) (set column to NULL)
"field": v	Some(Some(v)) (set column to v)

Functions

deserialize

Deserialize a present-but-maybe-null field into Some(inner).

serialize

Serialize the inner Option, treating outer None as null.