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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