rust serialization_error ai_generated true

the trait `Deserialize<'_>` is not implemented for `MyType`

ID: rust/rust-serde-deserialize-error

Also available as: JSON · Markdown
90%Fix Rate
92%Confidence
50Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1 active — — —

Root Cause

Serde's Deserialize trait must be derived or implemented for every type in the deserialization tree.

generic

Workarounds

  1. 93% success Derive Deserialize on the struct and all nested types 
    use serde::Deserialize;
#[derive(Deserialize)]
struct MyType {
    field: String,
    nested: NestedType, // must also derive Deserialize
}

    Sources: https://serde.rs/derive.html

  2. 85% success Use serde attributes for fields that need custom deserialization 
    #[derive(Deserialize)]
struct Config {
    #[serde(default)]
    optional_field: String,
    #[serde(rename = "camelCase")]
    my_field: i32,
}

    Sources: https://serde.rs/field-attrs.html

Dead Ends

Common approaches that don't work:

  1. Manually parse JSON strings instead of using serde 80% fail

    Error-prone, loses type safety, and doesn't scale with nested structures

  2. Use serde_json::Value everywhere and cast at runtime 65% fail

    Loses compile-time type checking and leads to fragile runtime panics

Error Chain

Leads to:
Preceded by:
Frequently confused with: