Struct QueryFunctionRequest 

#[non_exhaustive]
pub struct QueryFunctionRequest<'a> {
    pub function: &'a str,
    pub field: &'a str,
    pub arguments: &'a Value,
    pub principal: Option<&'a SecurityContext>,
    pub reader: Arc<dyn GuestQueryBridge>,
}

The field a QueryFunctionResolver is being asked to answer.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

function: &'a str

The declared function name, from the compiled query’s function key.

Never the field name: one function may back several fields, and the compiler checks the pairing in both directions, so this is the only name the dispatcher needs to look anything up by.

field: &'a str

The root query field being answered.

Passed so the guest can tell which field it was invoked for when one function backs several, and so a failure names the field rather than the module.

arguments: &'a Value

The field’s resolved arguments: request variables merged with the root field’s inline literals, nested $var references already substituted. An empty object when the field takes none.

principal: Option<&'a SecurityContext>

The requesting principal, or None for an anonymous request.

reader: Arc<dyn GuestQueryBridge>

The caller-scoped, read-only GraphQL bridge (#1328).

The same bridge a before:mutation hook reads through, built from this request’s own executor context and principal — deliberately not a second one. A function-backed field that reads sees exactly what its caller could have read, and cannot write.