Merge pull request #10 from matteodem/patch-1

Allow to set custom cache key through options

Author: Intellicode

src/cache.js

@@ -2,13 +2,16 @@ const hash = require('object-hash');
 
 const toSafeObject = obj => JSON.parse(JSON.stringify(obj || {}));
 
-function cache(func, options) {
+function cache(func, options = {}) {
   return (root, args, context) => {
     if (!context.resolverCache) {
       throw new Error('Missing resolverCache property on the Graphql context.');
     }
+    
+    const key = options.key 
+      ? options.key(root, args, context) 
+      : `${hash(func)}:${hash(toSafeObject(root))}:${hash(toSafeObject(args))}`;
 
-    const key = `${hash(func)}:${hash(toSafeObject(root))}:${hash(toSafeObject(args))}`;
     const executeAndCache = () =>
       Promise.resolve(func(root, args, context)).then((value) => {
         context.resolverCache.set(key, value, options);