Getting Bloodhound to work

Question

I'm implementing a typing suggestion functionality on my website using Typeahead.js/Bloodhound but I can't get Bloodhound to work. Here is the code:

var indicator_commands = new Bloodhound({
    datumTokenizer: function(d) {
        return Bloodhound.tokenizers.whitespace(d.defaultInput);
    },        
    queryTokenizer: Bloodhound.tokenizers.whitespace,
    prefetch: '/static/indicator.json',
});

console.log (indicator_commands.index.serialize());
indicator_commands.initialize();
console.log (indicator_commands.index.serialize());

Here is part of the indicator.json:

[
    {   "name": "sma",
        "fullname": "Smooth Moving Average",
        "parameter": "sma,period,applied_to_optional,#color_optional;",
        "defaultInput": "sma,14,close,#ababab;",
        "tokens" : ["sma,14,close,#ababab;"],
        "short_help": "",
        "long_help": "",
    },

    {   "name": "ema",
        "fullname": "Exponential Moving Average",
        "parameter": "ema,period,applied_to_optional,#color_optional;",
        "defaultInput": "ema,14,close,#ababab;",
        "tokens" : ["ema,14,close,#ababab;"],
        "short_help": "",
        "long_help": "",
    }
]

I was expecting some data in indicator_commands but it showed none. What do I need to change to get it working?

score 0 · Accepted Answer · answered Aug 12 '14 at 13:31

Your JSON is invalid.

You have a comma after the lest member of the object, ie. "long_help" : "", that is messing up bloodhoubd, you have to remove that.

You should also beware that indicator_commands.initialize(); will return a Promise according to bloodhound docs, so you have no guarantee that it actually has been initialized on your second call to serialize(). Although the code as is with the JSON fixed worked for me, you should probably use the Promise:

indicator_commands.initialize().then(function(b) {
     console.log('Success');
     console.log(indicator_commands.index.serialize());
},
function(e) { console.log('Error'); } );

Getting Bloodhound to work

1 Answers1