Diesel 介绍
Diesel 是一个安全可扩展的 Rust 编程语言的 ORM
框架和查询构建工具。Diesel 可避免运行时错误，提供最好的性能。
示例代码：
extern crate diesel_demo;
extern crate diesel;
use self::diesel_demo::*;
use self::diesel_demo::models::*;
use self::diesel::prelude::*;
fn main() {
use diesel_demo::schema::posts::dsl::*;
let connection = establish_connection();
let results = posts.filter(published.eq(true))
.limit(5)
.load::<Post>(&connection)
.expect("Error loading posts");
println!("displaying {} posts", results.len());
for post in results {
println!("{}", post.title);
println!("----------\n");
println!("{}", post.body);
}
}