pgorm 0.1.6

A lightweight Postgres-only ORM for Rust
Documentation 
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//! Compile-time tests for eager loading APIs generated by `#[derive(Model)]`.
//!
//! These tests verify macro expansion compiles (no real database operations).

#![allow(dead_code)]

use pgorm::{FromRow, GenericClient, Model, OrmResult};

#[derive(Debug, Clone, FromRow, Model)]
#[orm(table = "users")]
#[orm(has_many(Post, foreign_key = "user_id", as = "posts"))]
#[orm(has_one(Profile, foreign_key = "user_id", as = "profile"))]
struct User {
    #[orm(id)]
    id: i64,
    name: String,
}

#[derive(Debug, Clone, FromRow, Model)]
#[orm(table = "profiles")]
struct Profile {
    #[orm(id)]
    id: i64,
    user_id: i64,
    bio: String,
}

#[derive(Debug, Clone, FromRow, Model)]
#[orm(table = "posts")]
#[orm(belongs_to(User, foreign_key = "user_id", as = "author"))]
#[orm(many_to_many(
    Tag,
    through = "post_tags",
    self_key = "post_id",
    other_key = "tag_id",
    as = "tags"
))]
struct Post {
    #[orm(id)]
    id: i64,
    user_id: i64,
    title: String,
}

#[derive(Debug, Clone, FromRow, Model)]
#[orm(table = "tags")]
struct Tag {
    #[orm(id)]
    id: i64,
    name: String,
}

#[derive(Debug, Clone, FromRow, Model)]
#[orm(table = "comments")]
#[orm(belongs_to(Post, foreign_key = "post_id", as = "post"))]
struct Comment {
    #[orm(id)]
    id: i64,
    post_id: Option<i64>,
    body: String,
}

async fn _api_compiles(
    conn: &impl GenericClient,
    users: Vec<User>,
    posts: Vec<Post>,
    comments: Vec<Comment>,
) -> OrmResult<()> {
    // has_many
    let _posts_by_user = User::load_posts_map(conn, &users).await?;
    let _posts_by_user = User::load_posts_map_with(conn, &users, |q| {
        q.push(" ORDER BY id DESC");
    })
    .await?;
    let _users_loaded = User::load_posts(conn, users.clone()).await?;

    // has_one
    let _profile_by_user = User::load_profile_map(conn, &users).await?;
    let _profile_by_user = User::load_profile_map_with(conn, &users, |q| {
        q.push(" ORDER BY id DESC");
    })
    .await?;
    let _profile_by_user = User::load_profile_map_strict(conn, &users).await?;
    let _profile_by_user = User::load_profile_map_strict_with(conn, &users, |q| {
        q.push(" ORDER BY id DESC");
    })
    .await?;
    let _users_loaded = User::load_profile(conn, users).await?;

    // belongs_to (non-optional fk)
    let _users_by_id = Post::load_author_map(conn, &posts).await?;
    let _users_by_id = Post::load_author_map_with(conn, &posts, |q| {
        q.push(" ORDER BY id DESC");
    })
    .await?;
    let _posts_loaded = Post::load_author(conn, posts.clone()).await?;

    // many_to_many
    let _tags_by_post = Post::load_tags_map(conn, &posts).await?;
    let _tags_by_post = Post::load_tags_map_with(conn, &posts, |q| {
        q.push(" ORDER BY id DESC");
    })
    .await?;
    let _posts_loaded = Post::load_tags(conn, posts).await?;

    // belongs_to (optional fk) + strict variant
    let _comments_loaded = Comment::load_post_strict(conn, comments).await?;

    Ok(())
}

#[test]
fn eager_loading_api_compiles() {
    assert_eq!(User::TABLE, "users");
    assert_eq!(Post::TABLE, "posts");
    assert_eq!(Comment::TABLE, "comments");
}