How to use rust diesel with yew or any frontend?

Question

I build a rust database with diesel just like the docs and it worked fine in the terminal commands

fn main() {
    use database::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);
    }
}

but later when I used the following function inside yew I got the error

pub fn get_posts() -> Vec<Post> {
    let connection = establish_connection();
    use schema::posts::dsl::*;
    let results = posts.load::<Post>(&connection).expect("Error loading posts");
    results
}

Uncaught TypeError: Failed to resolve module specifier "env". Relative references must start with either "/", "./", or "../".

1. I am using postgres app on mac
2. i am using DATABASE_URL=postgres://apple:password@localhost/postgres for postgresql connect

Answer 1

You should probably have a backend server that has an access to the database, and your yew frontend calls that backend.

See for instance: https://github.com/tokio-rs/axum/blob/main/examples/sqlx-postgres/src/main.rs

If you prefer to use diesel, you would of course have to to adapt this example to make it work.