MongoDart find with problems

Question

I am implementing a MVC framework in Dart. I am implementing the find method and I want it to return the documents from that query.

The problem is that find() doesn't wait that the operation is performed and we need to bind a function inside then().

 static find(model, [params]){
     Db db = new Db("mongodb://127.0.0.1/dart");
     var models = [];
     db.open().then((o){
         return db.collection(model).find(params).forEach((d){
         models.add(d);
         });
     });
     return models;
}

Right now the return from find() is []. Do you know any way of returning the documents properly?

Take a look at github.com/vadimtsushko/mongo_dart/blob/master/example/… — Vadim Tsushko
Well, that really doesn't solve my problem. I just want to get the documents return and not deciding on find what I am doing with every document. Please take a look in the Python Driver for example, about how simple is to do a find and then getting the documents just in time giantflyingsaucer.com/blog/?p=839 — André Freitas
when doing potentially long running calls like to a database, the execution is better when it is asynchronous, if you only want to continue after you have your data then you just put all your code in the `.then((_){/*in here*/}) callback for when the future completes. it's done like this so it doesnt lock up your program, if you do want to continue doing other stuff whilst the database is fetching data. — Daniel Robinson

Günter Zöchbauer Günter Zöchbauer · Accepted Answer · 2014-06-10T17:47:23

 static Future<List> find(model, [params]){
     Db db = new Db("mongodb://127.0.0.1/dart");
     var models = [];
     return db.open().then((o){
       db.collection(model).find(params).forEach((d){
         models.add(d);
       });
       return models;
     });
}

and use it like

find(model, [p1, p2, p3]).then((m) => ...);

MongoDart find with problems

2 Answers