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Dynamic Query

Hi I am getting vf page error saying that id Not specifeid in update call. i got the record values using dynamic query into vf as inputfeild.when try to update the values on click of UpdateBarcode  geting the  error.


Vf :


<apex:page controller="Cls_Update_Size" sidebar="false" showHeader="false" >
<apex:form >
<apex:pageBlock id="repeat" >
<div style="margin:10px 300px 10px 400px"><h3 style="margin:10px 10px 10px 2px">Enter Barcode</h3><br/>
<apex:inputText value="{!Barcode}" size="40"/>
<apex:pageMessages />
<apex:panelGrid >
<apex:facet name="header">Select the Feilds to Update</apex:facet>
<table style="margin:0px 0px 0px 0px">
<apex:repeat value="{!Warpmthd}" var="c" id="table" >
<td><apex:inputCheckbox value="{!c.selected}"/>
<apex:outputlabel value="{!c.fl.Label}"/> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </td>

<apex:repeat value="{!fields}" var="f">
<strong> <apex:outputlabel value="{!f.label}" /></strong> </td> <td> <apex:inputField value="{!feildvalue[f.fieldPath]}" />
<apex:commandButton action="{!UpdateEntered}" value="Update" style="margin:30px 0px 10px 100px" />
<div style="margin:10px 0px 30px 1100px" ><br/><br/>
<apex:commandButton action="{!Find}" value="Find" rerender="repeat"/>&nbsp;&nbsp;
<apex:commandButton action="{!Oknext}" value="Ok and Next"/>&nbsp;&nbsp;
<apex:commandButton action="{!Close}" value="Close"/>





public class Cls_Update_Size {

public boolean updateButton { get; set; }

public String inputSection { get; set; }

public PageReference UpdateEntered(){
update feildvalue;
return null;

public Samples_Mgmt__c feildvalue{ get; set; }
Public Id SamId=null;
Public Id OffId=null;
public Samples_Mgmt__c sample;
public string size;
list<Samples_Mgmt__c> lstsam= new list<Samples_Mgmt__c>();
list<offer__c> lstoff= new list<offer__c>();
public String Barcode { get; set;}
public list<wrap> lstwrap {get; set;}
List<Schema.FieldSetMember> lstFieldSetMember =new List<Schema.FieldSetMember>();
List<Schema.FieldSetMember> selectedFeilds = new List<Schema.FieldSetMember>();

public Cls_Update_Size(){

lstsam=[select id,Bar_Code__c from Samples_Mgmt__c];
lstwrap=new List<wrap>();

public PageReference Find(){
updateButton =true;
for(wrap w: getWarpmthd()) {
if(w.selected == true) {
feildvalue=new Samples_Mgmt__c();

return null;

public Samples_Mgmt__c getFeildvalues(){

String query = 'SELECT ';
for(Schema.FieldSetMember f : this.getFields()) {
query += f.getFieldPath() + ', ';
query += 'Id, Name FROM Samples_Mgmt__c where id=:SamId';
return Database.query(query);

public List<Schema.FieldSetMember> getFields(){

return selectedFeilds;

public List<wrap> getWarpmthd(){

for(Schema.FieldSetMember mem :lstFieldSetMember){
lstwrap.add(new wrap(mem));
return lstwrap;
Public class Wrap{
public Boolean selected{get; set;}
public Schema.FieldSetMember fl{get; set;}
public Wrap(Schema.FieldSetMember m){
selected = false;



Thanks in advance...

Prafull G.Prafull G.

Hi Sri,


Can you post your debug statement at line before update i.e.




Seems like the fieldvalue you are attempting to update does not have Id field with it.





Thanks For your Reply..And this my Debug log Output.


|01pK0000000AfMm|Cls_Update_Size invoke(UpdateEntered)
06:00:15.081 (81913000)|METHOD_ENTRY|[8]|01pK0000000AfMm|Cls_Update_Size.__sfdc_feildvalue()
06:00:15.081 (81943000)|METHOD_EXIT|[8]|01pK0000000AfMm|Cls_Update_Size.__sfdc_feildvalue()
06:00:15.081 (81967000)|SYSTEM_METHOD_ENTRY|[8]|String.valueOf(Object)
06:00:15.081 (81977000)|SYSTEM_METHOD_EXIT|[8]|String.valueOf(Object)
06:00:15.082 (82001000)|SYSTEM_METHOD_ENTRY|[8]|System.debug(ANY)
06:00:15.082 (82010000)|USER_DEBUG|[8]|DEBUG|@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@null
06:00:15.082 (82019000)|SYSTEM_METHOD_EXIT|[8]|System.debug(ANY)
06:00:15.082 (82029000)|METHOD_ENTRY|[9]|01pK0000000AfMm|Cls_Update_Size.__sfdc_feildvalue()
06:00:15.082 (82046000)|METHOD_EXIT|[9]|01pK0000000AfMm|Cls_Update_Size.__sfdc_feildvalue()
06:00:15.082 (82129000)|EXCEPTION_THROWN|[9]|System.NullPointerException: Attempt to de-reference a null object
06:00:15.082 (82278000)|FATAL_ERROR|System.NullPointerException: Attempt to de-reference a null object

Class.Cls_Update_Size.UpdateEntered: line 9, column 1
06:00:15.082 (82289000)|CODE_UNIT_FINISHED|Cls_Update_Size invoke(UpdateEntered)

Prafull G.Prafull G.
You can see that the value of feildvalue is null and therefore you are getting the null pointer exception this time.

Please make sure that you get the record to update with Id specified.


Iam able to populate values in vf page as inputfeilds. But when i try to get the values from vf to controller it was showing null. 

i Used Feildvalue property to set and get the values..