cannot access 'this' in nested function

This question already has an answer here:

How to access the correct `this` inside a callback? 6 answers

Javascript “this” pointer within nested function 7 answers

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You are losing context in AJAX callback functions inside getTransactions and getCompanies too. Try this:

Rank.prototype.getTransactions = function(callback) {
    Transaction.find({}, function(err, transactions) {
        //blah blah blah
        this.transaction = transactions;
        callback();
    }.bind(this));
};

Rank.prototype.getCompanies = function(callback) {
    Company.find({}, function(err, comps) {
        //blah blah blah
        this.transaction = comps;
        callback();
    }.bind(this));
};

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this no longer refers to an object when used inside nested function calls, as the function does not have a parent object. If you assign this to a variable eg var self = this , you can access it like normal inside nested function calls.

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