bevyengine/bevy · error · ApplyError

enum variant `{variant_name}` doesn't have a field named `{f

Error message

enum variant `{variant_name}` doesn't have a field named `{field_name}`

What it means

ApplyError::MissingEnumField — try_apply targeted an enum variant that lacks a field present in the source value (fields are applied by name). Payloads: variant_name and field_name. Use variants with matching field sets or patch fields individually.

Source

Thrown at crates/bevy_reflect/src/reflect.rs:32

};

use thiserror::Error;

use crate::utility::NonGenericTypeInfoCell;

/// A enumeration of all error outcomes that might happen when running [`try_apply`](PartialReflect::try_apply).
#[derive(Error, Debug)]
pub enum ApplyError {
    #[error("attempted to apply `{from_kind}` to `{to_kind}`")]
    /// Attempted to apply the wrong [kind](ReflectKind) to a type, e.g. a struct to an enum.
    MismatchedKinds {
        /// Kind of the value we attempted to apply.
        from_kind: ReflectKind,
        /// Kind of the type we attempted to apply the value to.
        to_kind: ReflectKind,
    },

    #[error("enum variant `{variant_name}` doesn't have a field named `{field_name}`")]
    /// Enum variant that we tried to apply to was missing a field.
    MissingEnumField {
        /// Name of the enum variant.
        variant_name: Box<str>,
        /// Name of the missing field.
        field_name: Box<str>,
    },

    #[error("`{from_type}` is not `{to_type}`")]
    /// Tried to apply incompatible types.
    MismatchedTypes {
        /// Type of the value we attempted to apply.
        from_type: Box<str>,
        /// Type we attempted to apply the value to.
        to_type: Box<str>,
    },

    #[error("attempted to apply type with {from_size} size to a type with {to_size} size")]

View on GitHub (pinned to 396ca72708)

Solutions

1. Fix the variant/field names in the source data
2. Add the missing field to the enum variant definition

When it happens

Trigger: Thrown at crates/bevy_reflect/src/reflect.rs:32 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of bevyengine/bevy@396ca72708 (2026-08-20). Data as JSON: /api/errors/bd9c911b2f4836fe. Report an issue: GitHub.