Question

I went through the documentation and did not find anything related to databases.

I guess this is not yet natively possible — if not, then are there any libraries that utilize e.g. the Socket class to make it possible to connect to a database?

To be more specific, I’d like to connect to a MySQL and a MongoDB databases.

Answer 1

I found MongoDart to be the first library to give MongoDB access to Dart.

Here’s an example:

#import("../lib/mongo.dart");
#import("dart:builtin");

main() {
    Db db = new Db('mongo-dart-test');

    simpleUpdate() {
        DbCollection coll = db.collection('collection-for-save');
        coll.remove();  
        List toInsert = [
                         {"name":"a", "value": 10},
                         {"name":"b", "value": 20},
                         {"name":"c", "value": 30},
                         {"name":"d", "value": 40}
                       ];
        coll.insertAll(toInsert);
        coll.findOne({"name":"c"}).chain((v1) {
            print("Record c: $v1");
            v1["value"] = 31;    
            coll.save(v1);
            return coll.findOne({"name":"c"});
        }).then((v2) {
            print("Record c after update: $v2");
            db.close();
        });   
    };

    db.open().then((c)=>simpleUpdate()); 
}