Crate mongodb_macro

MongoDB Macro is a crate with macros for quickly creating structures when working with mongodb. In particular, macros are implemented for quick initialization of structures of the “factory” pattern. The purpose of this crate is to reduce the amount of boilerplate code when initializing standard structures.

installation

Install using cargo:

cargo install mongodb-macro

Make sure you also add to the project:

mongodb = “*”

Usage

Macro: Collection

use mongodb::bson::Bson;

// env DB_URL should contain a link to the mongodb url
// env DB_NAME should contain the database name
// env COLLECTION_NAME should contain the collection name
mongodb_macro::collection!(CollectionFactory; CollectionFactoryOpts);
// or with a specified env
// mongodb_macro::collection!(CollectionFactory; CollectionFactoryOpts; ("MONGO_DB_URL", "MONGO_DB_NAME", "MONGO_COLLECTION_NAME"));

async fn main() -> std::io::Result<()> {

    // std::env::set_var("MONGODB_HOST", "localhost");
    // std::env::set_var("DB_URL", "mongodb://root:root@${MONGODB_HOST}:27017");

    let factory = CollectionFactory::parse();

    let collection = factory.create::<Bson>().await.expect("failed to connect");
    
    ...
}

Macro: Database

use mongodb::bson::Bson;

// env DB_URL should contain a link to the mongodb url
// env DB_NAME should contain the database name
mongodb_macro::database!(DbFactory; DbFactoryOpts);
// or with a specified env
// mongodb_macro::database!(DbFactory; DbFactoryOpts; ("MONGO_DB_URL", "MONGO_DB_NAME"));

async fn main() -> std::io::Result<()> {

    // std::env::set_var("MONGODB_HOST", "localhost");
    // std::env::set_var("DB_URL", "mongodb://root:root@${MONGODB_HOST}:27017");

    let factory = DbFactory::parse();

    let db = factory.create().await.expect("failed to connect");

    let collection = db.collection::<Bson>("users");
    
    ...
}

Macro: Client

use mongodb::bson::Bson;

// env DB_URL should contain a link to the mongodb url
mongodb_macro::client!(ClientFactory; ClientFactoryOpts);
// or with a specified env
// mongodb_macro::client!(ClientFactory; ClientFactoryOpts; "MONGO_DB_URL");

async fn main() -> std::io::Result<()> {

    // std::env::set_var("MONGODB_HOST", "localhost");
    // std::env::set_var("DB_URL", "mongodb://root:root@${MONGODB_HOST}:27017");

    let factory = ClientFactory::parse();

    let client = factory.create().await.expect("failed to connect");

    let db = client.database("demo");
    let collection = db.collection::<Bson>("users");
    
    ...
}

Macro: Config

use mongodb::bson::Bson;
use mongodb_macro::Parser;

mongodb_macro::config!(Opts);
// equivalent to
// mongodb_macro::config!(Opts; "DB_NAME", "COLLECTION_NAME", "DB_URL");
//
// or with prefix
//
// mongodb_macro::config!(Opts, "MONGO");
// equivalent to
// mongodb_macro::config!(Opts; "MONGO_DB_NAME", "MONGO_COLLECTION_NAME", "MONGO_DB_URL");

async fn main() -> std::io::Result<()> {

    // std::env::set_var("MONGODB_HOST", "localhost");
    // std::env::set_var("DB_URL", "mongodb://root:root@${MONGODB_HOST}:27017");

    let opts = Opts::parse();

    let client = mongodb::Client::with_uri_str(&opts.db_url).await.expect("failed to connect");
    let db = client.database(&opts.db_name);
    let collection = db.collection::<Bson>(&opts.collection_name);
    
    ...
}

Macros

client

Creates a new factory to create a MongoDB client

client_config

Creates a new configuration structure to initialize the MongoDB client

collection

Creates a new factory to create a MongoDB collection

collection_config

Creates a new configuration structure to initialize the MongoDB collection

config

Quick and easy creates a new configuration to connect to MongoDB

database

Creates a new factory to create a MongoDB database

database_config

Creates a new configuration structure to initialize the MongoDB database