CODEWITHSUNDEEP
javascriptjqueryparse-platform
Siegfried Grimbeek
Siegfried Grimbeek

Reputation: 897

parse.com get Cannot read property 'indexOf' of undefined

I am displaying some results from Parse on a website but currently the loop is breaking because not all the columns have values in them.

var warningCreator = object.get("creator").get("country");

There are some instances where the user has not selected their country and that results in this error.

I am wondering if there is any way to check whether the result is undefined before calling it.

For iOs I found:

if ([object objectForKey:@"keyPath"]) {
  // the object has a value for key keyPath
}

Is there anything simialar for the javaScript SDK?

*Edit (Added more code for clarity):

        var WarningPoints = Parse.Object.extend("Warning_Point");
        var query = new Parse.Query("Warning_Point");

        query.include("creator");
        query.include("position");

        query.find({
            success: function(results) {
                markerCount = 0;

                if (results.length == 0) {
                    alert('There are Warning Points found for specified parameters.')
                };

                for (var i = 0; i < results.length; i++) {

                    var object = results[i];

                    var warningCreator = object.get("creator").get("country");

                    var warningLat = object.get("position").get("lat");
                    var warningLong = object.get("position").get("long");

                    if((object.get("position").get("address"))!=null){
                        warningAddress = object.get("position").get("address");
                    }

                    console.log(warningAddress);

                    var warningName = object.get("name");

                }
            },
            error: function(error) {
                alert("Error: " + error.code + " " + error.message);
            }
        });

The exact error in console is:

Uncaught TypeError: Cannot read property 'get' of undefined - and the line of the error is: warningCreator = object.get("creator").get("country");

Upvotes: 0

Views: 297

Answers (2)

cesarluis
cesarluis

Reputation: 907

if(object['keyPath']!=null){
 //the object has a value for key keyPath
}

Where object is the variable that contains your data retrieved from parse. You can be more accurate in your condition checking for empty values too.

In your case:

if(object.get("creator")!=null && object.get("creator").get("country")!=null){
 //the fields have a value
}
else{
 //Some field is null
}

You need to do a check for each .get("field") in your statement because each field can be null.

You have 2 nested .get().get() and probably the first one is returning null so it raises the exception.

Upvotes: 1

Siegfried Grimbeek
Siegfried Grimbeek

Reputation: 897

thanks for the help.

Sometimes you just need the opinion of some fresh eyes to freshen your views again.

if(object.get("creator") != null ){
                    if(object.get("creator").get("country") != null ){
                        var warningCreator = object.get("creator").get("country");
                    }
                }

                if(object.get("position") != null ){
                    if(object.get("position").get("lat") != null ){
                           var warningLat = object.get("position").get("lat");
                    }
                }

                if(object.get("position") != null ){
                    if(object.get("position").get("long") != null ){
                          var warningLong = object.get("position").get("long");
                    }
                }

                if(object.get("position") != null ){
                    if(object.get("position").get("address") != null ){
                         var warningAddress = object.get("position").get("address");
                    }
                }

Upvotes: 1

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