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