Query a backbone collection (or json) from a Filter model (or json) - json

Question

I'm trying to render a google map from data I have in a LocationCollection.
Users will define filterParameters in a Model, here is the JSON from a filter
var filter = {
"id_ref_type_category":[2,4],
"pricemin":5,
"pricemax":15,
"distmin":10, // meters
"distmax":150 // meters
}
I need to query my collection, here is a sample of json I have for my location
var location = [
{
"id":"1",
"name":"Sushi 1",
"price_min":"10",
"price_max":"20",
"price_avg":"15",
"id_ref_type_category":"1",
"latitude":"48.863831",
"longitude":"2.356215"
},
{
"id":"2",
"description":"Miam ",
"price_min":"15",
"price_max":"35",
"price_avg":"25",
"id_ref_type_category":"4",
"latitude":"48.864269",
"longitude":"2.355153"
},
{
"id":"3",
"name":"Restaurant 1",
"price_min":"5",
"price_max":"20",
"price_avg":"12.5",
"street_number":"60",
"id_ref_type_category":"1",
"latitude":"48.863407",
"longitude":"2.350938"
},
{
"id":"4",
"name":"Chez gigi",
"price_min":"0",
"price_max":"17",
"price_avg":"8.5",
"id_ref_type_category":"2",
"latitude":"48.861824",
"longitude":"2.350901"
}
]
Regarding to my filter parameter, i am looking for
a location with a id_ref_type_category equal 2 OR 4
a location with an average price around 5 and 15
a location within a distance around 10 and 150 (it's in meters) (if user allow geolocation)
I can calculate the distance from my position to the location with this js function from geocoding http://www.geodatasource.com/developers/javascript
I have looked for backbone collection filtering but didn't find a lot, I have looked for json query systems, but couldn't find any stuff.
I takes any suggestions.

Answer 1

How about applying a underscore filter for all the attributes like in here:
http://jsfiddle.net/cnDeu/1/
I have relaxed a bit your filter object so that a location makes it through.
Essentially the filter looks like this:
var filtered = loc.filter(function (el) {
var dist = distance(el.get('latitude'), el.get('longitude'),
position.latitude, position.longitude, 'K') / 1000;
return ((el.get('id') == filter.id_ref_type_category[0]) ||
(el.get('id') == filter.id_ref_type_category[1])) &&
el.get('price_avg') >= filter.pricemin &&
el.get('price_avg') <= filter.pricemax &&
dist >= filter.distmin &&
dist <= filter.distmax;
});