I have the following visualforce code and controller:
The error seems to be in the "<apex:inputField>" tag,
If i change this to <apex:inputText>,it is working but the changes made to Serial Number field are not saved.

Please help me!


Controller:

public with sharing class receivecont2 {
Purchase_order__c po;
Product_serial__c[] psl;
    public receivecont2(ApexPages.StandardController controller) {
this.po = (Purchase_order__c)controller.getRecord();               
 
     this.psl = [ SELECT
       d.Name,d.product_disp__c,d.received_quantity__c,d.Serial_Number__c
            FROM
      Product_serial__c d
      WHERE
       d.purchase_order__c = :po.id];
    }
     public pagereference saveChanges() {
  upsert this.psl;
return null;  
 }
          public pagereference newRec() {
  Product_serial__c d = new Product_serial__c();
  d.Purchase_order__c =this.po.id;
 psl.add( d );
  return null;
 }
public Product_Serial__c[] getRecs() {
  return this.psl;
 }
}

Visualforce page:


<apex:page standardController="Purchase_Order__c" extensions="receivecont2">
<apex:form >
 <apex:messages />

 <apex:sectionHeader title="Please enter Product Serials " />
 <apex:pageBlock >
  <apex:pageBlockButtons location="bottom">
   <apex:commandButton action="{!saveChanges}" value="Save"/>
       <apex:commandButton action="{!cancel}" value="Back" />
  </apex:pageBlockButtons>
  <apex:pageBlockTable value="{!Recs}" var="test">
  <apex:column value="{!test.Product_disp__c}"/>
   <apex:column value="{!test.Received_Quantity__c}"/>
     <apex:column >

      <apex:inputField value="{!test.Serial_Number__c)"/>
    </apex:column>
    
    
  </apex:pageBlockTable>
 
   
 </apex:pageBlock>
</apex:form>
  </apex:page>