{"action":"opened","issue":{"url":"https://api.github.com/repos/jquense/react-formal/issues/24","labels_url":"https://api.github.com/repos/jquense/react-formal/issues/24/labels{/name}","comments_url":"https://api.github.com/repos/jquense/react-formal/issues/24/comments","events_url":"https://api.github.com/repos/jquense/react-formal/issues/24/events","html_url":"https://github.com/jquense/react-formal/issues/24","id":116621436,"number":24,"title":"Cross-field validations?","user":{"login":"saikat","id":83782,"avatar_url":"https://avatars.githubusercontent.com/u/83782?v=3","gravatar_id":"","url":"https://api.github.com/users/saikat","html_url":"https://github.com/saikat","followers_url":"https://api.github.com/users/saikat/followers","following_url":"https://api.github.com/users/saikat/following{/other_user}","gists_url":"https://api.github.com/users/saikat/gists{/gist_id}","starred_url":"https://api.github.com/users/saikat/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/saikat/subscriptions","organizations_url":"https://api.github.com/users/saikat/orgs","repos_url":"https://api.github.com/users/saikat/repos","events_url":"https://api.github.com/users/saikat/events{/privacy}","received_events_url":"https://api.github.com/users/saikat/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-11-12T19:23:08Z","updated_at":"2015-11-12T19:23:08Z","closed_at":null,"body":"Apologies if this is already covered somewhere, but what is the best way with react-formal to do validations that depend on the values of multiple fields?  Should I just hook into the form's onChange handler and set this.setState with the errors?"}}