Hi Friends,

I have two custom objects 
1)  Invoice__c
2) Invoice_Product__c

These 2 objects have master detail relationship between them (Invoice_Product__c is child object)

Here, i am writing a visualforce page on parent object (Invoice__c) where i need to get the values of my child object (Invoice_Product__c).

My Page : 

<apex:repeat value="{!Invoice__c}" var="inv" id="theRepeat"> 
                
                    <tr style="font-size:16px;height:300px;vertical-align:text-top;Font-family:Verdana,Arial;"> 
                        <td style="border-left:1px solid;border-top:none;border-right:none;border-bottom:none;text-align:center;"><apex:outputText value="{!inv.Quantity__c.Invoice_Product__r}"/></td>
                      
                        <td style="border-left:none;border-top:none;border-right:1px solid;border-bottom:none;text-align:center;"><apex:outputText value="{!inv.Product_Name_del__c.Invoice_Product__r}"/></td>           
                        <td style="border-left:none;border-top:none;border-right:1px solid;border-bottom:none;text-align:center;"><apex:outputText value="{!inv.orderDiscount.Invoice_Product__r}" /></td> 

The Highlighted fields are from child object (Invoice_Product__c)

The error i was geeting was ::

  "Unknown property 'Integer.Invoice_Product__r'

How do I get the fields of (Invoice_Product__c) on my page.

Any help would be appriciated..!