[SalesForce] How to pass parameter in the new button to VF page in related list section

I have made a VF page and redirected the new button functionality into that VF page. The related SObject is List__c and it has a parent object called Folder__c. And in folder__c page layout I have the list__c related lists. And there is a new list button there.

By clicking that new list button, I realize the page is redirecting to this URL:

https://c.ap2.visual.force.com/apex/Choose_List_Type?CF00N2800000CopEM=Real+Estate&CF00N2800000CopEM_lkid=a032800000CVqB6&scontrolCaching=1&retURL=%2Fa032800000CVqB6&sfdc.override=1

In this, CF00N2800000CopEM_lkid seems to be the id of the folder. However, it doesn't seem to be the parameter name is something I can rely on. Seems to me it can change once the package is deployed into another org. So how can I retrieve the parent Id here?

Best Answer

Visualforce interprets fields like into the underlying SObject. That means that you can reliably determine the parent record like this:

public MyController(ApexPages.StandardController ctrl) {
    MySObject__c record = (MySObject__c)ctrl.getRecord();
    Id parentId = record.ParentField__c;
    // Do something with parentId
}

You should never rely on ApexPages.currentPage().getParameters() for values like "Id" or a specific field name, because they could theoretically change at any time. Always use supported methods, like StandardController.getRecord(), to get fields that are passed in to the Visualforce page via the system.

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[SalesForce] Prepopulate fields on visualforce page from a button on another VF page

Based on the resulting url, your {!account.Id} value is null. This indicates the record has not yet been inserted. So the core problem has nothing to do with parameters, but rather order of operations. You should use a commandButton that calls an action something like:

public static final String ID_PARAM = 'Id';
public static final String ACCOUNT_PARAM = 'accid';
public static final String RETURL_PARAM = 'retURL';

public PageReference save()
{
    try
    {
        insert myAccount;
    }
    catch (DmlException dmx)
    {
        ApexPages.addMessages(dmx);
        return null;
    }

    PageReference retUrl = Page.AccountView;
    retUrl.getParameters().put(ID_PARAM, myAccount.Id);

    PageReference redirect = Page.OpportunityNew;
    redirect.getParameters().put(ACCOUNT_PARAM, myAccount.Id);
    redirect.getParameters().put(RETURL_PARAM, retUrl.getUrl());
    return redirect;
}

Note that because your parameter names are all public, you can now reference them from your other controller/extension to make sure you get an exact match. Your markup would look something like:

<apex:pageMessages id="msgs" />
<apex:form>
    <apex:commandButton value="Save" action="{!save}" rerender="msgs" />
</apex:form>

[SalesForce] How to pass multiple value to url parameter

If you want all child Account records, just pass the parent Id and query for the children in your constructor. Or you can pass in the Account Id itself and query for the siblings.

public List<Account> children { get; private set; }
public MyExtension(ApexPages.StandardController controller)
{
    // if using parent
    children = [SELECT ... FROM Account WHERE Parent__c = :controller.getId()];
}
public MyExtension(ApexPages.StandardController controller)
{
    // if using Account
    Account record = [SELECT Parent__c FROM Account WHERE Id = :controller.getId()];
    children = [SELECT ... FROM Account WHERE Parent__c = :record.Parent__c];
}

Best Answer

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