How to populate values into this map? There are three objects named job__c, employee__c and a junction object between job__c and employee__c named `JobEmployeeJunction__c´. I want the list of employees related to a job.

Map<Id,Map<Id,Employee__c>> mapOfIdToJunctionObjectToEmployee = new Map<Id,Map<Id,Employee__c>>();
For(JobEmployeeJunction__c jobEmpJunction : jobEmployeeJunctionList){
  For(Job__c jobVar : jobList){
      mapOfIdToJunctionObjectToEmployee.put(jobVar.id,jobEmpJunction.Employee__c, new Employee__c());
  • jobList = [Select Client__c,Client_Type__c,Amount_without_discount__c,Discount__c,Due_Amount__c,End_Date__c,Number_of_booking_days__c,Paid_Amount__c,Recurrences__c,Start_Date__c,Status__c,Type_of_job__c,Amount_to_be_paid__c from job__c where id IN :jobId]; jobEmployeeJunctionList = [Select Employee__c,Job__c,Amount_Paid_By_Client__c,Sallary_For_Employee__c,Start_Date__c,End_Date__c from JobEmployeeJunction__c where Job__c IN :jobId]; Jan 20 '17 at 9:53

There are multiple ways to form the query/perform this task depending how you want to map to be.

According to your question you want all employees listed for each Jobs i.e Job Ids I assume. So below is a sample code which will form a Map of Job Ids to a list of employees who have applied for it.

The SOQL query which I used will fetch all the Employees in the system and the inner query will fetch all the associated Jobs to each employees. Next, I loop through each Employee's associated jobs and populate the Job Id to Employees map.

Map<Id, List<Employee__c>> mapOfJobIdToEmployees = new Map<Id, List<Employee__c>>();
for(employee__c emp : [select Id, (Select Id, job__c from JobEmployeeJunctions__r)  from employee__c])
    for(JobEmployeeJunction junctionRec : emp.JobEmployeeJunctions__r)
            mapOfJobIdToEmployees.put(junctionRec.job__c, new List<Employee__c>{emp});

Feel free to ask questions.


I don't think you need a complicated map of map in your scenario. I suggest to you to use the Query child-to-parent relationships in soql (link to SFDC docs) to query the junction object and get all the information you need from the related object (Job__c / Employee__c )

    List<JobEmployeeJunction__c> jobEmployeeJunctionList = [Select Employee__c,Job__c,Amount_Paid_By_Client__c,Sallary_For_Empl‌​oyee__c,Start_Date__‌​c,End_Date__c,Job__r.Client__c,Job__r.Client_Type__c,Job__r.Amount_without_discount__c,Job__r.Discount‌​__c,Job__r.Due_Amount__c,Job__r.En‌​d_Date__c,Job__r.Number_of_‌​booking_days__c,Job__r.Paid‌​_Amount__c,Job__r.Recurrenc‌​es__c,Job__r.Start_Date__c,Job__r.‌​Status__c,Job__r.Type_of_jo‌​b__c,Job__r.Amount_to_be_pa‌​id__c from JobEmployeeJunction__c where Job__c IN :jobId]; 

    Map<Id,List<Id>> mapOfIdJobToEmployeeIdList = Map<Id,List<Id>>();
    for(JobEmployeeJunction__c jobEmpJunction : jobEmployeeJunctionList){
        List<Id> employeeIdList;
            //There is no key: Instantiate a new list
            employeeIdList = new List<Id>();
            //There is a Key in the map: a list is already instantiated
            employeeIdList = mapOfIdJobToEmployeeList.get(jobEmpJunction.Job__c);

        //add the Id of the employee
        mapOfIdJobToEmployeeList.put(jobEmpJunction.Job__c, employeeIdList);

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.