The problem
I needed to use the 0.5.0-dev version of Rocket as I wanted to use the new async features. As this version is not yet published you need to point Cargo to a git repository. However, I needed some functionality of rocket_contrib, the Uuuid, but I was very confused on how to add it to the dependencies correctly. As I am currently very new on Rust, Rocket and the documentation did not properly explained it. I got the following error when compiling:
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the trait `FromFormField<'_>` is not implemented for `rocket_contrib::uuid::Uuid`
At this point I was very confused as Uuid implements the FromFormField according to the docs. But the problem was that I did not properly configured my Cargo.toml
The solution
The correct Cargo.toml would be the following
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[package]
name = "example"
version = "0.1.0"
edition = "2018"
[dependencies]
rocket = { git = "https://github.com/SergioBenitez/Rocket", version = "0.5.0-dev" }
rocket_contrib = { git = "https://github.com/SergioBenitez/Rocket", version = "0.5.0-dev", default-features = false, features = ["uuid"] }
Or the following would also be correct
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[package]
name = "example"
version = "0.1.0"
edition = "2018"
[dependencies]
rocket = { git = "https://github.com/SergioBenitez/Rocket", version = "0.5.0-dev" }
[dependencies.rocket_contrib]
git = "https://github.com/SergioBenitez/Rocket"
version = "0.5.0-dev"
default-features = false
features = ["uuid"]