[Vuejs]-Cannot execute for loop in vue.js

By changing the for loop like so, this worked:

el: '#adresponse',

ready: function() {
    this.fetchMessages();
},

data: {
    classified_bids: {},
    accept_qty: {},
    submitted: false
},

methods: {
    fetchMessages: function () {
        this.$http.get('/api/getbids')
            .success(function (bids) {
                this.classified_bids = bids;
                for (var key in this.classified_bids) {
                    this.accept_qty[key] = 0;
                }
            });
    }
}

});

Your problem is the value of this inside the .success() callback.

You could try something like this:

this.$http.get('/api/getbids')
  .success(function (bids) {
    this.classified_bids = bids;
    for (i = 0; i < this.classified_bids.length; i++) {
      this.accept_qty[i] = 0;
    }
  }.bind(this));

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