Order of struct fields does not seem to be preserved even when using the preserve_order feature

[johnperry-math]

Issue #428 addressed the question of preserving the order of fields as declared in a struct, but when I add this feature to Cargo.toml, the fields are still sorted in the Schema.

For example, suppose I modify the todo-axum example's Cargo.toml so that we have:

utoipa = { path = "../../utoipa", features = ["axum_extras", "preserve_order"] }

...and main.rs so that we have this:

    /// Item to do.
    #[derive(Serialize, Deserialize, ToSchema, Clone)]
    pub(super) struct Todo {
        id: i32,
        #[schema(example = "Buy groceries")]
        value: String,
        checked: bool,
        done: bool,
    }

The result is that the fields are still in alphabetical order:

Am I doing something wrong, have I misunderstood the purpose of that change, or is it something else entirely?

Similarly, is it possible to display the paths in the order they're declared in the openapi macro's paths(...) declaration?

[juhaku]

Am I doing something wrong, have I misunderstood the purpose of that change, or is it something else entirely?

Hey, this seems to be regression bug in the utoipa-swagger-ui. If you print the schema as json to to console or file before you pass it to the SwaggerUi you should see correct behavior. I believe this occurred due to changes here #502.

I will fix as a next thing on my list.

Similarly, is it possible to display the paths in the order they're declared in the openapi macro's paths(...) declaration?

This is not directly possible with utoipa since paths are sorted in UI itself. https://github.com/swagger-api/swagger-ui/blob/master/docs/usage/configuration.md#display In order to sort paths you need to provide operationSorter attribute that is not supported by utoipa-swagger-ui by default at the moment.

[johnperry-math]

Thank you for the quickr response! Do you know when it will appear via cargo update or cargo upgrade?

[juhaku]

To my knowledge it should be already available since I have already released it to the crates. https://crates.io/crates/utoipa-swagger-ui

[johnperry-math]

Thanks, I can confirm it works :-)

[juhaku]

Great