Diesel: "Expression not implemented for Uuid" in 1.2

[jonathanstrong]

Setup

Versions

• Rust: 1.27.0-nightly
• Diesel: 1.1.2
• Database: Postgres
• Operating System Ubuntu 16.04

Feature Flags

• diesel: postgres, extras

Problem Description

On upgrading to v1.2, I'm getting an error I don't understand. This error is not present when trying to compile with v1.1. I have enabled the "uuid" feature (via "extras" feature):

error[E0277]: the trait bound `uuid::Uuid: diesel::Expression` is not satisfied
   --> src/lib.rs:207:14
    |
207 |     #[derive(Insertable, Debug)]
    |              ^^^^^^^^^^ the trait `diesel::Expression` is not implemented for `uuid::Uuid`
    |
    = note: required because of the requirements on the impl of `diesel::Expression` for `&uuid::Uuid`
    = note: required because of the requirements on the impl of `diesel::expression::AsExpression<diesel::sql_types::Uuid>` for `&uuid::Uuid`

[Eijebong]

Check that you don't have multiple versions of uuid in your lockfile

[sgrif]

This is almost certainly due to the use of two versions of uuid. I'm going to close this, as it seems resolved. Feel free to comment here, open a new issue, or ask for help in gitter if you continue to have problems.