Json request validation for mandatory field - springboot rest-api

Question

In below json request, you can see salary is available at 3 level student level, trainee level and properties level

employee{
id :"123";
name : "ABC";
salary : 100;
college : "abcd..";
Trainees : {
  id :"101";
  name :"XYZ";
  salary :50;
 }
properties :{ // key value pair values
  default.salary= 20
  default.college=null
 }
}

As salary is mandatory for my application, so salary should be available at least one level.

If salary field and its value is not available at all level then some error should be thrown and request should not be processed by rest webservice and if salary is available at any one level then request should be accepted and processed by rest webservice.

I am using currently javax.validation.constraints for json request validation, Is there any way to achieve above requirement?

Could you add your POJOs to the description? – Ismail Sep 07 '20 at 14:59 — Ismail, Sep 07 '20 at 14:59
What if Jpa is not used? Integrations for example – JRichardsz Jan 28 '23 at 00:18 — JRichardsz, Jan 28 '23 at 00:18

score 1 · Answer 1 · answered Sep 07 '20 at 15:41

If you want to use javax bean validations you will need to define a custom annotation (there is not a default one for you specific use case) and implement ConstraintValidator with your custom validation. You can see examples here: https://www.baeldung.com/javax-validation-method-constraints.

In this case the 3 salary fields should be nullable and your validation logic should verify that at least one of them is not null.

Json request validation for mandatory field - springboot rest-api

1 Answers1