NaturalQueryLib

Welcome to NaturalQueryLib, a highly flexible SQL query builder written in Rust! This library allows you to build and execute SQL queries with ease, while supporting dynamic parameters and JSON encoding for database compatibility.

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🚀 Features

• Supports SELECT, INSERT, UPDATE, and DELETE queries.
• Fluent API for building complex SQL queries.
• JSON support via serde_json and sqlx.
• Asynchronous execution with sqlx connection pools.
• Lightweight and developer-friendly.

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📦 Installation

Add the following to your Cargo.toml:

naturalquerylib = "0.1.0"
sqlx = { version = "0.8", features = ["runtime-tokio-native-tls", "json"] }
async-trait = "0.1"
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"

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🛠️ Usage

Basic Setup

First, configure your SQLx connection pool:

use sqlx::{Pool, Postgres};
use naturalquerylib::Query;

#[tokio::main]
async fn main() -> Result<(), sqlx::Error> {
    let pool = Pool::<Postgres>::connect("postgres://user:password@localhost/db_name").await?;
    
    // Example query
    let result = Query::select()
        .from("users")
        .columns(&["id", "name", "email"])
        .where_clause("active = true")
        .limit(10)
        .execute(&pool)
        .await?;

    println!("Rows affected: {}", result);
    Ok(())
}

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Examples

1️⃣ SELECT Query

let select_query = Query::select()
    .from("users")
    .columns(&["id", "name", "email"])
    .where_clause("age > 18")
    .order_by(&["name ASC"])
    .limit(5)
    .build();

println!("Generated Query: {}", select_query);
// Output: SELECT id, name, email FROM users WHERE age > 18 ORDER BY name ASC LIMIT 5

2️⃣ INSERT Query

let insert_query = Query::insert_into("users")
    .columns(&["name", "email", "age"])
    .values(&["John Doe", "john.doe@example.com", 30])
    .build();

println!("Generated Query: {}", insert_query);
// Output: INSERT INTO users (name, email, age) VALUES (?, ?, ?)

3️⃣ UPDATE Query

let update_query = Query::update("users")
    .set(&[("name", "Jane Doe"), ("email", "jane.doe@example.com")])
    .where_clause("id = 1")
    .build();

println!("Generated Query: {}", update_query);
// Output: UPDATE users SET name = ?, email = ? WHERE id = 1

4️⃣ DELETE Query

let delete_query = Query::delete_from("users")
    .where_clause("id = 1")
    .build();

println!("Generated Query: {}", delete_query);
// Output: DELETE FROM users WHERE id = 1

5️⃣ JOIN Query

let join_query = Query::select()
    .from("users")
    .join(JoinType::Inner, "orders", "users.id = orders.user_id")
    .columns(&["users.id", "users.name", "orders.total"])
    .build();

println!("Generated Query: {}", join_query);
// Output: SELECT users.id, users.name, orders.total FROM users INNER JOIN orders ON users.id = orders.user_id

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Asynchronous Execution

Execute a Query

let rows_affected = Query::update("users")
    .set(&[("active", true)])
    .where_clause("last_login < '2023-01-01'")
    .execute(&pool)
    .await?;

println!("Rows affected: {}", rows_affected);

Fetch Results

#[derive(Debug, sqlx::FromRow)]
struct User {
    id: i32,
    name: String,
    email: String,
}

let users: Vec<User> = Query::select()
    .from("users")
    .columns(&["id", "name", "email"])
    .where_clause("active = true")
    .fetch_all(&pool)
    .await?;

for user in users {
    println!("{:?}", user);
}

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🎨 Stickers for Clarity

Query Type	Example Output
SELECT	SELECT id, name FROM users WHERE active = true LIMIT 5
INSERT	INSERT INTO users (name, email) VALUES (?, ?)
UPDATE	UPDATE users SET name = ?, email = ? WHERE id = 1
DELETE	DELETE FROM users WHERE id = 1
JOIN	SELECT users.id, orders.total FROM users INNER JOIN orders ON users.id = orders.user_id

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🧩 Contributing

Contributions are welcome! Please fork the repository and submit a pull request for any improvements or bug fixes.

1. Fork the project.
2. Create your feature branch (git checkout -b feature/YourFeature).
3. Commit your changes (git commit -m 'Add YourFeature').
4. Push to the branch (git push origin feature/YourFeature).
5. Open a pull request.

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📜 License

This project is licensed under the MIT License. See the LICENSE file for details.

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💬 Feedback

If you have any feedback, questions, or suggestions, feel free to reach out via GitHub Issues.