Get all possible value of a certain field from Leancloud

all possible value of a field

var getAllValues = function (className, fieldName) {
    var promise = new AV.Promise();

    var TargetClass = AV.Object.extend(className);
    var values = [];
    var getNextValue = function () {
        var query = new AV.Query(TargetClass);
        query.notContainedIn(values);
        query.first().then(function (obj) {
            if (obj) {
                values.push(obj.get(fieldName));
                getNextValue()
            } else {
                promise.resolve(values);
            }
        })
    }
    return promise;
}

var getAllValues = function (className, fieldName) {
var promise = new AV.Promise();

var TargetClass = AV.Object.extend(className);
var values = [];
var getNextValue = function () {
    var query = new AV.Query(TargetClass);
    query.notContainedIn(fieldName, values);
    query.first().then(function (obj) {
        if(obj) {
            values.push(obj.get(fieldName));
            getNextValue()
        } else {
            values.sort()
            promise.resolve(values);
        }
    }, function (err) {
        promise.reject(err);
    })
}
getNextValue();
return promise;

}
求PR