DioxusLabs/dioxus · error · syn::Error

Could not find a field with the name '{}'

Error message

Could not find a field with the name '{}'

What it means

Error "Could not find a field with the name '{}'" thrown in DioxusLabs/dioxus.

Source

Thrown at packages/router-macro/src/query.rs:64

                tokens
            }
        }
    }

    pub fn parse_from_str<'a>(
        route_span: proc_macro2::Span,
        mut fields: impl Iterator<Item = (&'a Ident, &'a Type)>,
        query: &str,
    ) -> syn::Result<Self> {
        // check if the route has a query string
        if let Some(query) = query.strip_prefix(":..") {
            let query_ident = Ident::new(query, proc_macro2::Span::call_site());
            let field = fields.find(|(name, _)| *name == &query_ident);

            let ty = if let Some((_, ty)) = field {
                ty.clone()
            } else {
                return Err(syn::Error::new(
                    route_span,
                    format!("Could not find a field with the name '{}'", query_ident),
                ));
            };

            Ok(QuerySegment::Single(FullQuerySegment {
                ident: query_ident,
                ty,
            }))
        } else {
            let mut query_arguments = Vec::new();
            for segment in query.split('&') {
                if segment.is_empty() {
                    return Err(syn::Error::new(
                        route_span,
                        "Query segments should be non-empty",
                    ));
                }

View on GitHub (pinned to 393d190a80)

When it happens

Trigger: Thrown at packages/router-macro/src/query.rs:64 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of DioxusLabs/dioxus@393d190a80 (2026-08-16). Data as JSON: /api/errors/adf02fe5498cde74. Report an issue: GitHub.