Jtdylktuy

I want to retrieve the picklist values of all picklist fields from a standard object. Below part of the code

 //Wrapper class 

public class FieldMetaDataWrapper {

   @AuraEnabled

   public String fieldapiname {get;set;}

   @AuraEnabled

   public String fieldtype {get;set;}

   @AuraEnabled

   public Boolean isPicklist {get;set;}

   @AuraEnabled

   public List<String> picklistValues {get;set;}



   public FieldMetaDataWrapper(String fieldapiname,  String fieldtype, Boolean isPicklist, List<String> picklistValues){

       this.fieldapiname = fieldapiname;

       this.fieldtype = fieldtype;

       this.isPicklist =isPicklist;

       this.picklistValues =picklistValues;

   }

}





 @AuraEnabled

  public static List<fieldMetaDataWrapper> getFieldMetaData(){



    List<FieldMetaDataWrapper> fieldData = new List<FieldMetaDataWrapper>();

    Set<String>fieldAPINames =  new Set<String>();



   <Code to get all the fieldAPINames of the Object>



   // map of all fields in the object

   Schema.DescribeSObjectResult descSobj=User.getSObjectType().getDescribe();

    Map<String, Schema.SObjectField> objectFields = descSobj.fields.getMap();

    Map<String, List<String>> pickValuemap = new Map<String, list<String>>();

    List<String> pickvalues = new List<String>();



   // iterate over the requested fields and get the describe info for each one.

    for(String field : fieldAPINames){

      Schema.DescribeFieldResult dr = objectFields.get(field).getDescribe();

      Schema.DisplayType isPick = dr.getType();

      List<Schema.PicklistEntry> pl = dr.getPickListValues();

      if(String.valueOf(isPick) == 'PICKLIST'){

         for (Schema.PicklistEntry a : pl){

           String name = a.getValue();

           pickvalues.add(name);

          }

          pickValuemap.put(field, pickvalues);

          fieldData.add(new FieldMetaDataWrapper(field, String.valueOf(dr.getType()), true, pickValuemap.get(field)));

      }else{

          fieldData.add(new FieldMetaDataWrapper(field, String.valueOf(dr.getType()), false, null));

    }





return fieldData;

}

But in the wrapper object, wherever the ispicklist boolean is true, all the picklist values of all fields are getting added. For example for the statecode picklist field, the JSON list comes as below. Can't get my head around as to why the entire list is being added here .

{

    "fieldapiname": "statecode",

    "fieldtype": "PICKLIST",

    "isPicklist": true,

    "picklistValues": [

        <<Entire picklist values of all picklist fields of the Object>>

         ]

 }

You're initializing the pickvalues only once, so you're really just updating the same list over and over again. To demonstrate this clearly, try this code:

String a = new String { 'Hello' };

String b = a;

b.add('World');

System.debug(String.join(a,' ')); // Output is "Hello World"

You need to move this line:

List<String> pickvalues = new List<String>();

To here:

  if(String.valueOf(isPick) == 'PICKLIST'){

    List<String> pickvalues = new List<String>();

This will give you a new object for each picklist.

P.S. You can use the enum directly:

  if(isPick == Schema.DisplayType.PICKLIST){

It's slightly longer but avoids the runtime conversion and possible typos.

P.P.S. Don't forget about the MULTIPICKLIST and COMBOBOX varieties (if applicable).