Performing synchronous requests in the cloud-based Parse Framework

Question

I wrote an asynchronous background cloud job for the Parse Framework that generates a display username for each user based on their email, before the "@" character. Unfortunately, I get the error "too many counting operations" when completing a job. Is there a way for queries and saves to be executed sequentially, rather than in parallel? I saw this in the documentation with promises, but I'm confused about how to make it work with nested queries.

Parse.Cloud.job("generateUsernameForEveryUser", function(request, status) { // Set up to modify user data Parse.Cloud.useMasterKey(); var counter = 0; // Query for all users var query = new Parse.Query(Parse.User); query.each(function(user) { createUsernameForUser(user, 0, { success: function(username) { if(username == null) { status.error(); } else { user.set("displayUsername", username); user.set("displayUsernameUppercase", username.toUpperCase()); user.save(); } }, error: function(error) { status.error("Error: " + error.message); } }); }).then(function() { // Set the job success status status.success("Username generation completed successfully."); }, function(error) { // Set the job error status status.error("Uh oh, something went wrong."); }); }); function createUsernameForUser(user, count, callback) { var generatedUsername = user.getEmail().substring(0, user.getEmail().indexOf("@")); if(count > 0) { //Quotes added to ensure no math is done between generatedUsername and count generatedUsername = "" + generatedUsername + "" + count; } var userQuery = new Parse.Query(Parse.User); userQuery.equalTo("displayUsernameUppercase", generatedUsername.toUpperCase()); userQuery.count({ success: function(userCount) { if(userCount > 0) { createUsernameForUser(user, count + 1, { success : function(responseUsername) { callback.success(responseUsername); }, error: function(error) { callback.error(error.message); } }); } else { callback.success(generatedUsername); } }, error: function(error) { console.log("Error trying to count users: " + error.message); callback.error("Error trying to count users: " + error.message); } });//End of userQuery call } 

Answer 1

This is a very late answer, but it will be useful for people going through this.

too many count operations error is returned because query.each will only work if we have data of 100 or less rows for this class.

We can fulfill the same requirement as follows:

• Get all users.
• Create usernames and save them in an array. For more information, see parsing operations parse.com. var users = new Array(); .... push all the created user objects to users .... Parse.Object.saveAll(users); //save the list -

Hope this solves.