Qfyilyi

I am trying to save multiple documents(via Mongoose) through a recursive method.

I created a Promise which resolves a method admin_save_choices() to save an Array of documents and finally return an Array of Objects after saving the documents or error message. Along with that when a document is saved in callback it recursively call itself(admin_save_choices()) until Array element exists.

Here is the Promise -

        let choices_object_array_promise = new Promise(function(resolve, reject) {

          let choices_object_array = admin_save_choices(choices, timestamp);



          resolve(choices_object_array);

        });



        choices_object_array_promise.then(function(result){



          console.log(result);

          res.status(200);

          res.json('success');

        }).catch(function(error) {

          res.status(400);

          res.json('error');

        });

Here is the method -

var admin_save_choices = function(choices, timestamp) {

    let choices_object_array = ;



    let choice = choices.shift();



    if (typeof choice === "undefined")

      return choices_object_array;



    let choice_information = {

      choice: choice,

      created_time: timestamp

    };



    let save_choice_promise = choiceModel.save_choice(choice_information);



    save_choice_promise.then(function(choice_result_object) {



      choices_object_array.push(choice_result_object);



      admin_save_choices(choices, timestamp);



    }).catch(function(error) {

      return 'error';

    });

}

All documents are being saved successfully except I don't get the result come back to choices_object_array_promise.then( callback.

It is showing undefined in console.log(result)

Thanks in advance.

This is because admin_save_choices do not return anything.

I guess your trying to return the array of admin, maybe this is what you want to do :

// inside admin_save_choices 

return save_choice_promise

  .then(function(choice_result_object) {

    choices_object_array.push(choice_result_object);

    return admin_save_choices(choices, timestamp);

  }).catch(function(error) {

    return error;

  });

}



let choices_object_array_fn = new Promise(function(resolve) {

  resolve(admin_save_choices(choices, timestamp));

});

Edit: For anti anti-pattern sake :)