make url empty when the field has no value

[TomonoriSoejima]

It would be nice if we can allow an option to disable expansion if the value is empty.

Suppose you had an index as below

PUT test1

POST test1/1
{
  "name" : "elastic"
}

POST test1/1
{
  "name" : ""
}

In Discover page

You can see that the name field has an active link for both documents.
But sometimes the null value can cause invalid url which can be avoided if the expansion is controlled based on the fact that the value is empty or not.

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[elasticmachine]

Pinging @elastic/kibana-app-arch (Team:AppArch)

[ppisljar]

Thank you for contributing to this issue, however, we are closing this issue due to inactivity as part of a backlog grooming effort. If you believe this feature/bug should still be considered, please reopen with a comment.