Use Tera Context for data instead of struct

[EraYaN]

Would it be possible to enable RenderHtml to accept the Tera Context instead of a struct? Some handlers might need to return RenderHtml with different templates (and thus different Models) and as far an I can see that won't work.

[Altair-Bueno]

I don't fully understand your question. Could you please provide an example of what you are trying to accomplish?

Some handlers might need to return RenderHtml with different templates (and thus different Models) and as far an I can see that won't work.

fn foo(engine: AppEngine) -> impl IntoResponse {
  // Won't compile because `if` and `else` have incompatible types
  if rand::random() {
    RenderHtml("one", engine, &data1)
  } else {
    RenderHtml("two", engine, &data2)
  }
}

fn foo(engine: AppEngine) -> Response {
  if rand::random() {
    RenderHtml("one", engine, &data1).into_response()
  } else {
    RenderHtml("two", engine, &data2).into_response()
  }
}

[EraYaN]

use tera::Context;

let mut context = Context::new();

context.insert("item", &item);

return RenderHtml("one", engine, &context)

This allows to use RenderHtml calls (in an if for example) in the same handler with different context variables.

[Altair-Bueno]

Context is nothing but a wrapper around serde_json::Value, which implements serializable. You can transform into the inner type by using into_json

However I would suggest you do not use tera::Context but rather serde_json::Value or similar, as it would lock your application to tera and wouldn't allow for an easy engine switch if you later decide so. The idea behind axum-template is to simplify template usage no matter the engine used, similar to spring web and other frameworks, without locking in to certain conventions.

[EraYaN]

Aah I didn't know I could potentially use serde_json::Value, I was just playing with some speedtests and it needed to return a 404 with a different model. But I'll look into adding this crate back in. I'll close this for now.

[Altair-Bueno]

it needed to return a 404 with a different model

In that case you could also return a Result::Err with said error. Result impl IntoResponse

Err((StatusCode::NOT_FOUND,RenderHtml("notfound",engine,data)))