iron integration does not compile

[yanns]

I followed the instructions found on https://maud.lambda.xyz/web_frameworks.html to integrate with iron.
And this was working until I updated my dependencies.

Now I have the following compilation error:

error[E0277]: the trait bound `maud::PreEscaped<std::string::String>: iron::modifier::Modifier<iron::Response>` is not satisfied
  --> src/main.rs:88:12
   |
88 |         Ok(Response::with((status::Ok, markup)))
   |            ^^^^^^^^^^^^^^ the trait `iron::modifier::Modifier<iron::Response>` is not implemented for `maud::PreEscaped<std::string::String>`
   |
   = help: the following implementations were found:
             <maud::PreEscaped<std::string::String> as iron::modifier::Modifier<iron::response::Response>>
   = note: required because of the requirements on the impl of `iron::modifier::Modifier<iron::Response>` for `(iron::status::StatusCode, maud::PreEscaped<std::string::String>)`
   = note: required by `iron::Response::with`

error: aborting due to previous error

I use hyper v0.10.5

Any hint?

[ernestas-poskus]

show your Cargo.toml

[yanns]

https://github.com/yanns/zeugnis/blob/master/Cargo.toml

[ernestas-poskus]

@yanns problem is that maud added support for iron for 0.5.x version if I am not mistaken, anyway this will solve your problem

λ ow master /tmp/zeugnis
$ g diff
diff --git a/Cargo.toml b/Cargo.toml
index b3a9e23..5783b45 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.1.0"
 authors = ["Yann Simon <[email protected]>"]
 
 [dependencies]
-iron = "0.4.0"
+iron = "0.5.1"
 maud = { version = "*", features = ["iron"] }
 maud_macros = "*"
 

[yanns]

Thx for the hint!
(I don't know why it was working before..)

[ernestas-poskus]

@yanns if documentation is outdated or missing extra step please feel free to update it

[lambda-fairy]

@ernestas-poskus is pretty much correct here. Maud depends on Iron 0.5.* only, so if your app uses 0.4 then the compiler will report that they are incompatible.

See also rust-lang/rust#22750 and rust-lang/cargo#2064 and this article.

[yanns]

I understand all your points.
But I still do not understand why is has worked before.
Maybe previous cargo versions have picked the transitive dependency instead of the one found in cargo.toml.

[yanns]

I am trying to propose a change for the documentation, but I don't get how gitbook is working... too dumb...