How to get this.userId in function inside Meteor method

Question

I need to call a few times a function for every user who is logged in, but when the function is placed inside meteor method, this.userId becomes undefined inside function scope, here's the example:

myMethod: function(){

  console.log(this.userId); // this returns proper userId

  function innerFunction(){
    console.log(this.userId); // this returns undefined
  };
  innerFunction();

}

How can I pass this.userId inside a function? Does a function has to be binded with Meteor.bindEnvironment?

Answer 1

You have some variants to resolve this:

• use .bind() method:

   myMethod: function () { console.log(this.userId); // this returns proper userId function innerFunction() { console.log(this.userId); // this returns undefined } innerFunction.bind(this); } 

• use .apply() method for applying correct this into function:

   myMethod: function () { console.log(this.userId); // this returns proper userId function innerFunction() { console.log(this.userId); // this returns undefined }; innerFunction.apply(this); } 

• also you can just use that insted of this for pass the scope into in innerFunction :

   myMethod: function () { var that = this; console.log(this.userId); // this returns proper userId function innerFunction() { console.log(that.userId); // this returns undefined } innerFunction(); } 

• or just pass userId into innerFunction

   myMethod: function () { var userId = this.userId; console.log(this.userId); // this returns proper userId function innerFunction(userId) { console.log(userId); // this returns undefined } innerFunction(); } 

Answer 2

There are a couple of ways you can do it:

myMethod: function () {
    var me = this;

    function innerFunction () {
        console.log(me.userId);
    };

    innerFunction();
}

or

myMethod: function () {
    var innerFunction = function () {
        console.log(this.userId);
    }.bind(this);

    innerFunction();
}

Answer 3

have you tried to bind the function ?

   myMethod: function(){

      console.log(this.userId); // this returns proper userId


  function innerFunction(){
    console.log(this.userId); // this returns undefined
  }.bind(this);
  innerFunction();

}