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Get all required fields of Salesforce sObject.

Get all required fields of Salesforce sObject
Get all required fields of Salesforce sObject

In this article we will discuss how to find required fields of an Salesforce Object . The code given here to find required fields is applicable for Standard and Custom Objects as well .

There is no standard build in method available in Salesforce to find List of all required fields .

To demonstrate the concept we have created the Custom Object named as Student , Which is having one required field – *Age .

Find all Standard and Custom required Fields

Now In order to find the field is required or not we can use the isNillable() method . The following code will return all the Standard and Custom required fields.

				
					Map<String, Schema.SObjectType> describe = Schema.getGlobalDescribe();
Map<String, Schema.SObjectField> mapFields = describe.get('Student__c').getDescribe().fields.getMap();
for( String fieldName : mapFields.keySet() ) {
    Schema.DescribeFieldResult desribeResult = mapFields.get(fieldName).getDescribe();
    if(!desribeResult.isNillable()) {
        System.debug('Required Field '+  mapFields.get(fieldName));
    }   
}

Find all Custom required fields 

				
					Map<String, Schema.SObjectType> describe = Schema.getGlobalDescribe();
Map<String, Schema.SObjectField> mapFields = describe.get('Student__c').getDescribe().fields.getMap();
for( String fieldName : mapFields.keySet() ) {
    Schema.DescribeFieldResult desribeResult = mapFields.get(fieldName).getDescribe();
    if(!desribeResult.isNillable() && !desribeResult.isDefaultedOnCreate() ) {
        System.debug('Required Field '+  mapFields.get(fieldName));
    }   
}

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