Key uniqueness across two lists

YANG
1

Hi all,

I have separate two lists A and B with key a1 and b1 respectively of type string. I want that a1 and b1 should not have anything in common means i should not be able to add a1 as xyz if in list B b1 has a key xyz or vice versa
How to add that

Regards,
Himani

2

Hello,

one easy approach can be using the must statement in the key elements of the lists.
Something like:

module test1 {

  namespace "http://tail-f.com/ns/example/test1";
  prefix test1;

  list A {
    key "a1";
    leaf a1 {
      must "not(../../B[b1=current()])" {
        error-message "Same key already exists in list B!";
      }
      type string;
    }
  }

  list B {
    key "b1";
    leaf b1 {
      must "not(../../A[a1=current()])" {
        error-message "Same key already exists in list A!";
      }
      type string;
    }
  }
}

This should prevent you from adding any specific key value to both of the lists…

3

Thanks for the response :slight_smile: