Module decode 

classify: serde_json::Value to ParseValue.

The inverse of ParseValue::to_json. Everything above parse-rust-core needs this, because a request body arrives as untyped JSON and has to become a typed value before any pipeline can reason about it.

Two upstream behaviors shape the signature, and both are easy to get wrong in the safer direction:

Unknown __type is rejected at the top level and preserved when nested. validateObject raises INCORRECT_TYPE for an unrecognized __type, but it does not recurse, so a nested one is stored verbatim as an ordinary object (SchemaController.js:1303), and it is reproduced deliberately. A recursive rejection would be tidier and would reject writes parse-server accepts.

A literal null is a value, not an absence. It classifies as ParseValue::Null here. The rule that writing null never creates a field lives in the schema controller, not in the decoder, because it is a schema decision rather than a parsing one.

Functions

classify

Decode a client-supplied JSON value.

classify_nested

Decode a value that sits inside an array or a plain object.