Unsigned numbers not showing up in diesel print-schema for MySQL

[pie-flavor]

Setup

up.sql:

CREATE TABLE users (
    id INTEGER UNSIGNED PRIMARY KEY,
    pass_hash BINARY(60) NOT NULL,
    username VARCHAR(24) NOT NULL
)

Versions

• Rust: 1.27.0-nightly bd40cbbe1 2018-04-14
• Diesel: 1.2.0
• Database: MySQL 5.7.21.0
• Operating System Windows 10 1709 build 16299.371

Feature Flags

• diesel: --no-default-features --features mysql

Problem Description

diesel print-schema does not correctly respect unsigned integers.

What are you trying to accomplish?

Use an unsigned integer in a database.

What is the expected output?

table! {
    users (id) {
        id -> Unsigned<Integer>,
        pass_hash -> Binary,
        username -> Varchar,
    }
}

What is the actual output?

table! {
    users (id) {
        id -> Integer,
        pass_hash -> Binary,
        username -> Varchar,
    }
}

Are you seeing any additional errors?

No.

Steps to reproduce

1. Use diesel migrate to introduce the above table schema.
2. Run diesel print-schema and notice the lack of unsignedness.

Checklist

• I have already looked over the issue tracker for similar issues.