URL No Longer Exists ParentId=ApexPages.currentPage().getParameters().get('ParentId');

Question

I have a VF page that allows child records to be updated , this is working well.EXCEPT for the following page I am trying to use ParentId=ApexPages.currentPage().getParameters().get('ParentId'); and Pagereference page=new pagereference('/'+parentId);

I can enter test data in successfully but the follow up page after clicking save throws URL No Longer Exists

This is the VF page

<apex:page controller="AddingChildController" >
    <apex:form >
        <apex:variable var="rowNum" value="{!0}" />
        <apex:pageBlock >
            <apex:variable var="rowNum" value="{!0}" />
            <apex:PageBlockTable value="{!childList}" var="int">
            <apex:facet name="footer">
                <apex:commandLink value="Add" action="{!insertRow}"/>
                </apex:facet>
                <apex:column headerValue="Lead Generator">
                    <apex:inputField value="{!int.Lead_Gen__c}"/>                                      
                </apex:column>

                <apex:column headerValue="Pay Run">
                    <apex:inputField value="{!int.Pay_Run__c}"/>                                      
                </apex:column>

                <apex:column headerValue="Monday">
                <apex:inputField value="{!int.Monday__c}"/>
                </apex:column>
                <apex:column headerValue="Tuesday">
                <apex:inputField value="{!int.Tuesday__c}"/>
                </apex:column>
                <apex:column headerValue="Wednesday">
                <apex:inputField value="{!int.Wednesday__c}"/>
                </apex:column>
                <apex:column headerValue="Thursday">
                <apex:inputField value="{!int.Thursday__c}"/>
                </apex:column>
                <apex:column headerValue="Friday">
                <apex:inputField value="{!int.Friday__c}"/>
                </apex:column>
                 <apex:column headerValue="Delete">
                <apex:commandLink style="font-size:15px; font-weight:bold; text-align:center;color:red;" value="X" action="{!delRow}">
                    <apex:param value="{!rowNum}" name="index"/>
                    </apex:commandLink>
                    <apex:variable var="rowNum" value="{!rowNum+1}"/>
                </apex:column>
            </apex:PageBlockTable>
        <apex:pageBlockButtons >
            <apex:commandButton value="Save" action="{!insertChild}"/>
            </apex:pageBlockButtons>
        </apex:pageBlock>

      </apex:form>
</apex:page>

And this is the controller

public class AddingChildController {
    Id parentId;
    public List<Time_Sheets__c> childList {get;set;}
    public Integer rowNum{get;set;}


    public AddingChildController(){
        Id childId = ApexPages.currentPage().getParameters().get('childId');
        childList = new List<Time_Sheets__c>();
        childList.add(new Time_Sheets__c());
        ParentId=ApexPages.currentPage().getParameters().get('ParentId');   

    }

    public pagereference insertChild(){
        insert childList;
        Pagereference page=new pagereference('/'+parentId);
        Return page;

    }    

    public void insertRow(){
        childList.add(new Time_Sheets__c());


    }

    public void delRow(){
        rowNum = 
    Integer.valueof(apexpages.currentpage().getparameters().get('index'));

    childList.remove(rowNum);
    }
}

any ideas where I am going wrong ?

Answer 1

If you want to redirect to the parent's detail page, you can use the lookup field on child record and then navigate to that record.

So your code should be

public pagereference insertChild(){
    insert childList;

    Pagereference parentPage;
    if(!childList.isEmpty() && !string.isBlank(childList[0].Lead_Gen__c))
        parentPage=new pagereference('/'+childList[0].Lead_Gen__c);
    return parentPage;
} 

So the above code inserts the child records and navigates to the first child records parents detail page. Assumption here is that all child records would be having the same parent record.