[SalesForce] How to return contact and account in a single method

In Salesforce Trailhead there is one Challenge available. Please find the challenge description below

create an Apex REST class that is accessible at '/Accounts/<Account_ID>/contacts'. The service will return the account's ID and Name plus the ID and Name of all contacts associated with the account. Write unit tests that achieve 100% code coverage for the class and run your Apex tests.

The Apex class must be called 'AccountManager'.
The Apex class must have a method called 'getAccount' that is
annotated with @HttpGet
The method must return the ID and Name for the requested record and
all associated contacts with their ID and Name.

Based on last condition how can I return account and contact from same method ?
I returned Account object alone. but it throws the following exception.

MyCode:

Account result =  [SELECT ID,Name FROM Account WHERE Id = :accId];
return result;

Exception :

There was an unexpected error in your org which is preventing this assessment check from completing: 
System.ListException: List index out of bounds: 0

Best Answer

You will return a Account with contacts in same list.

Your SOQL should have inner query for contacts linked with account .

Code :

Account acc = [select id ,name ,(select id ,Name from contacts) from Account ];

When you return acc.contacts will hold contact list as well

Related Solutions

[SalesForce] Apex REST API to return a Map of Maps

A technique I have used for this sort of case is to directly set the JSON in the response rather than relying on the framework to do the serialization (which as you have noticed has some limitations):

@HttpGet 
global static void getAppDefaults() {

    RestResponse res = RestContext.response;
    if (res == null) {
        res = new RestResponse();
        RestContext.response = res;
    }
    try {
        Map<String, Map<String,Object>> appDefaults = ...
        ..
        res.responseBody = Blob.valueOf(JSON.serialize(appDefaults));
        res.statusCode = 200;
    } catch (Exception e) {
        res.responseBody = Blob.valueOf(
                String.valueOf(e) + '\n\n' + e.getStackTraceString()
                );
        res.statusCode = 500;
    }
}

This avoids the double encoding that returning String from the method produces.

A further advantage of the above pattern (at least in the context of managed packages) is that if you want to change the structure of the JSON in the future you can; relying on the method signature you cannot because global methods can't be changed once packaged.

A bit more information in An @RestResource Apex class that returns multiple JSON formats.

[SalesForce] Apex REST Services Challenge – Unclear on return format

Kindly Update test class AccountManagerTest. Also add base url in Remote Site Settings.

@isTest
private class AccountManagerTest { 
    @isTest static void testAccountManager() {
        Id recordId = createTestRecord();

        Contact Cont1 = new Contact();
        Cont1.LastName = 'ABC';
        Cont1.AccountId = recordId ;
        insert Cont1;

        Contact Cont2 = new Contact();
        Cont2.LastName = 'XYZ';
        Cont2.AccountId = recordId ;
        insert Cont2 ;

        RestRequest request = new RestRequest();
        request.requestUri =
            'https://{baseurl}/services/apexrest/Accounts/'+recordId+'/contacts';
        request.httpMethod = 'GET';
        RestContext.request = request;
       Account lst = AccountManager.getAccount();
       /* Tried to return Contact List but failed Trailhead Verification
       List<Contact> lst = new List<Contact>();
       lst = AccountManager.getAccount();
       */
    }

    static Id createTestRecord() {
        Account accTest = new Account(Name='Test Record');
        insert accTest ;
        return accTest.Id;
    }          

}

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