Comments (4)
Sure, this would be possible if you required some additional derives on the struct, etc. (Field names are not strings, and can't be converted into strings, without some additional work) It's not something I'm interested in working on but if you'd like to see it, and would like to work on it, it could be great to start as a library and bring into the core if it seems useful to people.
I am not particularly interested in two-way data binding in general (and it can currently be implemented in user-land or in a library with a use:
directive), and definitely not by adding special behavior/new pseudo-attributes like <input model/>
or magic syntax like Angular's [(...)]
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The short answer is "no." The medium answer is "I've tried to do something similar with checking arbitrarily nested children at compile time and isn't possible in a reasonable way that I can figure out."
The slightly longer/custom answer is that you could create a wrapping component that allows you to do it but probably not with a view-macro-like syntax.
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@gbj I'm not certain if this aligns with Leptos' principles. By the way, other frameworks address this issue with custom attributes for data binding (e.g., Angular's ngModel
). Could we envision something similar in Leptos?
E.g.
struct AddTodoInputData {
message: String,
}
#[server(AddTodo, "/api")]
pub async fn add_todo(data: AddTodoInputData) -> Result<(), ServerFnError> {
todo!()
}
#[component]
fn AddTodo() -> impl IntoView {
let add_todo = create_server_action::<AddTodo>();
let mut form_data = AddTodoInputData::default();
view! {
<ActionForm action=add_todo(form_data)>
<label>
<input type="text" model={form_data.message}/>
</label>
<input type="submit" value="Add"/>
</ActionForm>
}
}
Maybe this could even work before the wasm is loaded if the name
attribute is automatically generated from the model field name.
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Maybe, since there is already a generated AddTodo
struct, there could be additional helper fields on it?
E.g.: <input type="{AddTodo::title_field.input_type}" name="{AddTodo::title_field.name}"/>
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