From bb325d5f1f0fa08a16dbe528525a2633e8dce2f6 Mon Sep 17 00:00:00 2001
From: Matt Black <mb@mattblack.io>
Date: Thu, 3 May 2018 12:49:51 -0400
Subject: [PATCH] prevent links from getting added twice

---
 LinkDirective.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/LinkDirective.js b/LinkDirective.js
index 135170d..55b84dd 100644
--- a/LinkDirective.js
+++ b/LinkDirective.js
@@ -83,6 +83,11 @@ export default class LinkDirective extends SchemaDirectiveVisitor {
       }
     }
 
+    // Check if a link already exists. 
+    // This should be beefed up to check all the ways it could be a different link.
+    if (thisCollection.__links && thisCollection.__links[field.name]) {
+      return
+    };
     thisCollection.addLinks({
       [field.name]: {
         collection: referencedCollection,