SOQL AggregateResult Query throws error: System.ListException: Row with null Id at index: 0

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Background



I have this Apex SOQL query:



 myMap = new Map<Id, AggregateResult>([SELECT OpportunityLineItemId, 
 MIN(ScheduleDate) Starts
 FROM OpportunityLineItemSchedule 
 WHERE OpportunityLineItemId IN :opportunityLineItemMap.keySet()
 AND ScheduleDate != NULL
 GROUP BY OpportunityLineItemId]);


Which throws this error:




System.ListException: Row with null Id at index: 0




Questions



  1. Why?

  2. What am I doing wrong?

  3. How can I fix it?





apex soql map aggregate aggregateresult







share|improve this question



























    up vote
    3
    down vote

    favorite












    Background



    I have this Apex SOQL query:



     myMap = new Map<Id, AggregateResult>([SELECT OpportunityLineItemId, 
     MIN(ScheduleDate) Starts
     FROM OpportunityLineItemSchedule 
     WHERE OpportunityLineItemId IN :opportunityLineItemMap.keySet()
     AND ScheduleDate != NULL
     GROUP BY OpportunityLineItemId]);


    Which throws this error:




    System.ListException: Row with null Id at index: 0




    Questions



    1. Why?

    2. What am I doing wrong?

    3. How can I fix it?





    apex soql map aggregate aggregateresult







    share|improve this question























      up vote
      3
      down vote

      favorite









      up vote
      3
      down vote

      favorite











      Background



      I have this Apex SOQL query:



       myMap = new Map<Id, AggregateResult>([SELECT OpportunityLineItemId, 
       MIN(ScheduleDate) Starts
       FROM OpportunityLineItemSchedule 
       WHERE OpportunityLineItemId IN :opportunityLineItemMap.keySet()
       AND ScheduleDate != NULL
       GROUP BY OpportunityLineItemId]);


      Which throws this error:




      System.ListException: Row with null Id at index: 0




      Questions



      1. Why?

      2. What am I doing wrong?

      3. How can I fix it?





      apex soql map aggregate aggregateresult







      share|improve this question













      Background



      I have this Apex SOQL query:



       myMap = new Map<Id, AggregateResult>([SELECT OpportunityLineItemId, 
       MIN(ScheduleDate) Starts
       FROM OpportunityLineItemSchedule 
       WHERE OpportunityLineItemId IN :opportunityLineItemMap.keySet()
       AND ScheduleDate != NULL
       GROUP BY OpportunityLineItemId]);


      Which throws this error:




      System.ListException: Row with null Id at index: 0




      Questions



      1. Why?

      2. What am I doing wrong?

      3. How can I fix it?





      apex soql map aggregate aggregateresult




      apex soql map aggregate aggregateresult






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 32 mins ago









      Robs

      1,169323




      1,169323




















          1 Answer
          1






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          up vote
          3
          down vote













          You need to alias some field to Id in order for the Map<Id, SObject>(List<SObject>) constructor to work.



          SELECT
           OpportunityLineItemId Id, 
           MIN(ScheduleDate) Starts
          FROM OpportunityLineItemSchedule 
          WHERE ...
          GROUP BY OpportunityLineItemId


          As your query is currently written, a given AggregateResult will only allow you to get three "fields":



          • expr0

          • OpportujnityLineItemId

          • Starts





          share|improve this answer






















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            up vote
            3
            down vote













            You need to alias some field to Id in order for the Map<Id, SObject>(List<SObject>) constructor to work.



            SELECT
             OpportunityLineItemId Id, 
             MIN(ScheduleDate) Starts
            FROM OpportunityLineItemSchedule 
            WHERE ...
            GROUP BY OpportunityLineItemId


            As your query is currently written, a given AggregateResult will only allow you to get three "fields":



            • expr0

            • OpportujnityLineItemId

            • Starts





            share|improve this answer


























              up vote
              3
              down vote













              You need to alias some field to Id in order for the Map<Id, SObject>(List<SObject>) constructor to work.



              SELECT
               OpportunityLineItemId Id, 
               MIN(ScheduleDate) Starts
              FROM OpportunityLineItemSchedule 
              WHERE ...
              GROUP BY OpportunityLineItemId


              As your query is currently written, a given AggregateResult will only allow you to get three "fields":



              • expr0

              • OpportujnityLineItemId

              • Starts





              share|improve this answer
























                up vote
                3
                down vote










                up vote
                3
                down vote









                You need to alias some field to Id in order for the Map<Id, SObject>(List<SObject>) constructor to work.



                SELECT
                 OpportunityLineItemId Id, 
                 MIN(ScheduleDate) Starts
                FROM OpportunityLineItemSchedule 
                WHERE ...
                GROUP BY OpportunityLineItemId


                As your query is currently written, a given AggregateResult will only allow you to get three "fields":



                • expr0

                • OpportujnityLineItemId

                • Starts





                share|improve this answer














                You need to alias some field to Id in order for the Map<Id, SObject>(List<SObject>) constructor to work.



                SELECT
                 OpportunityLineItemId Id, 
                 MIN(ScheduleDate) Starts
                FROM OpportunityLineItemSchedule 
                WHERE ...
                GROUP BY OpportunityLineItemId


                As your query is currently written, a given AggregateResult will only allow you to get three "fields":



                • expr0

                • OpportujnityLineItemId

                • Starts






                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited 11 mins ago

























                answered 22 mins ago









                Adrian Larson♦

                100k19107225




                100k19107225



























                     

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