ryzz 0.2.1

# ryzz

ryzz is an automatic migration generator and query builder for sqlite in rust.

- Automatic append only migrations
- Sql-like syntax
- Query builder not an orm

# Install

```sh
cargo add ryzz
```

# Declare your schema

```rust
use ryzz::*;

#[table("posts")]
struct Post {
    #[ryzz(pk)]
    id: i64,
    title: Option<String>,
    body: String
}

#[table]
struct Comment {
    #[ryzz(pk)]
    id: i64,
    body: String,
    #[ryzz(fk = "posts(id)")]
    post_id: i64,
}
```

# Insert, update and delete

```rust
let db = Database::new("db.sqlite3").await?;
let posts = Post::table(&db).await?;
let comments = Comment::table(&db).await?;

let post = Post {
    id: 1,
    title: None,
    body: "".into()
};

// insert into posts (id, body) values (?, ?) returning *
let mut post: Post = db
    .insert(posts)
    .values(post)?
    .returning()
    .await?;

post.body = "post".into();

// update posts set body = ?, id = ? where id = ? returning *
let post: Post = db
    .update(posts)
    .set(post)?
    .where_(and(eq(posts.id, 1), eq(posts.title, Value::Null)))
    .returning()
    .await?;

// delete from posts where id = ? returning *
let post: Post = db
    .delete_from(posts)
    .where_(eq(posts.id, 1))
    .returning()
    .await?;
```

# Querying

```rust
// select ... from Comment
let rows: Vec<Comment> = db
    .select(())
    .from(comments)
    .all()
    .await?;

// select ... from Comment
let rows: Vec<Comment> = db
    .select((comments.id, comments.body))
    .from(comments)
    .all()
    .await?;
```

# Joins

```rust
#[row]
struct CommentWithPost {
    comment: Comment,
    post: Post
}

// select ... from Comment inner join posts on posts.id = Comment.post_id
let rows = db
    .select(())
    .from(comments)
    .inner_join(posts, eq(posts.id, comments.post_id))
    .all::<CommentWithPost>()
    .await?;
```

# Prepared Statements

```rust
let query = db
    .select(())
    .from(comments);

let prepped = query.prep::<Comment>();

let rows: Vec<Comment> = prepped.all().await?;
```

# Manage Indexes

```rust
let ix = index("posts_id_body_ix")
    .unique()
    .on(posts, (posts.id, posts.body));

// create unique index if not exists posts_id_body_ix on posts (id, body);
db.create(&ix).await?;

// drop index if exists posts_id_body_ix;
db.drop(&ix).await?;
```

# Sqlite to rust type map

| Sqlite | Rust |
| ------------- | ------------- |
| Text | String |
| Integer | i64 |
| Real | f64 |
| Null | None |
| Blob | Vec&lt;u8&gt; |

# Automatic migrations

- Schema migrations only ever `create table` or `alter table add column`. Inspired by [trevyn/turbosql](https://github.com/trevyn/turbosql)
- When `<Your Table>::table(&db).await?` is called, the migrations are run.