Parse javascript count method on queries

Question

In Parse's javascript API, does the count method not do anything if no objects are returned? I'm trying to query for a new table I just added, and I can't seem to get a query to return results.

var contactObj = Parse.Object.extend("Contact");
var contactQuery = new Parse.Query(contactObj);
contactQuery.equalTo("phone", req.body.From);

    contactQuery.count({
      success: function(number) {
        // There are number instances of MyClass.
        console.log("something");
      },
      error: function(error) {
    // error is an instance of Parse.Error.
            console.log("error");
    }
});

In this code, when run, no console.logs are received, but the enclosing method that I call does print that it has been run. Does count not get to success OR failure if the count is 0?

Chasky · Accepted Answer · 2015-01-14 09:51:03Z

1

Your are missing the response.success and response.error calls, but console logs are still writing. See below

Your exact piece of code is returning in your workstation console "success/error was not called" when running. But still in parse portal console you see "something" output...

Output parse console in your local machine:

{"code":141,"error":"success/error was not called"}

Output parse portal in Logs

Failed with: success/error was not called
I2015-01-14T09:28:26.174Z] something

I'd added below two lines:

response.success("something success");
response.error("something error");

so actual code will be like the one below:

Parse.Cloud.define("StackOverflowTesting", function(request, response) {
   var contactObj = Parse.Object.extend("Contact");
   var contactQuery = new Parse.Query(contactObj);
   contactQuery.equalTo("phone", req.body.From);
   contactQuery.count({
         success: function(number) {
           // There are number instances of MyClass.
           console.log("something success console");
           response.success("something success");
         },
         error: function(error) {
         // error is an instance of Parse.Error.
             console.log("something error console");
             response.error("something error");
     }
   });

});

outputs workstation console:

{"result":"something success"}

Parse portal Log:

Result: something success 
I2015-01-14T09:29:54.355Z] something success console

edited Jan 14, 2015 at 9:51

answered Jan 14, 2015 at 9:42

Chasky

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3 Comments

BHendricks Over a year ago

Sorry this wasn't clear, but there are below this query more queries and a push, which at the lowest level will call response.success/response.error. I thought that if I did those too early then the execution would terminate before reaching my further code.

Timothy Walters Over a year ago

Nothing in the OP suggests this code was running in the cloud, sounds more like it was being run client-side and having issues when the table is empty.

Sandra Over a year ago

@BHendricks you can pass your callback (or response) function(s) down the chain, e.g.

function (req, callbacks) {                     var query = new Parse.Query(Parse.User);                     query.containedIn('phoneNumber', request.body.phoneNumbers);                     query.find(callbacks);                 };

Sagar · Accepted Answer · 2016-08-10 17:25:19Z

I had a similar issue where console.logs were not called from success and error blocks. This was caused due to an infinite while loop after the query. Something of this kind -

    var c = 0;
    var query = new Parse.Query("XXXXX");
    query.equalTo("YYYY","abc");
    query.count({
                success: function(count) {
                         c += 1;
                         console.log("success");
                },
                error: function(error) {
                       c += 1;
                       console.log("failure");
                }
                });
   while (c < 1){
   }
   ..........

Node.js is asynchronous but it's also single-threaded. Make sure you do not have any such code blocks which are holding up the execution.

Also, query.count gets to success even if the no. of results is 0.

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