From a58e15c4c8a079c29e49307af44c992343db0565 Mon Sep 17 00:00:00 2001
From: Riley Davis <riley.davis@gmail.com>
Date: Thu, 20 Apr 2017 18:00:06 -0600
Subject: [PATCH] let ApolloClient know which types are interfaces

---
 client/coral-admin/src/services/client.js     |  2 ++
 .../src/services/fragmentMatcher.js           | 33 +++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 client/coral-admin/src/services/fragmentMatcher.js

diff --git a/client/coral-admin/src/services/client.js b/client/coral-admin/src/services/client.js
index 7f6a0567d..7d65f3f92 100644
--- a/client/coral-admin/src/services/client.js
+++ b/client/coral-admin/src/services/client.js
@@ -1,7 +1,9 @@
 import ApolloClient, {addTypename} from 'apollo-client';
 import getNetworkInterface from './transport';
+import fragmentMatcher from './fragmentMatcher';
 
 export const client = new ApolloClient({
+  fragmentMatcher,
   addTypename: true,
   queryTransformer: addTypename,
   dataIdFromObject: (result) => {
diff --git a/client/coral-admin/src/services/fragmentMatcher.js b/client/coral-admin/src/services/fragmentMatcher.js
new file mode 100644
index 000000000..daa01a538
--- /dev/null
+++ b/client/coral-admin/src/services/fragmentMatcher.js
@@ -0,0 +1,33 @@
+import {IntrospectionFragmentMatcher} from 'apollo-client';
+
+// TODO this is a short-term fix
+// we need to set up something to query the server for the schema before ApolloClient initialization
+// https://github.com/apollographql/apollo-client/issues/1555#issuecomment-295834774
+const fm = new IntrospectionFragmentMatcher({
+  introspectionQueryResultData: {
+    __schema: {
+      types: [
+        {
+          kind: 'INTERFACE',
+          name: 'Action',
+          possibleTypes: [
+            {name: 'FlagAction'},
+            {name: 'LikeAction'},
+            {name: 'DontAgreeAction'}
+          ],
+        },
+        {
+          kind: 'INTERFACE',
+          name: 'ActionSummary',
+          possibleTypes: [
+            {name: 'FlagActionSummary'},
+            {name: 'LikeActionSummary'},
+            {name: 'DontAgreeActionSummary'}
+          ],
+        }
+      ],
+    },
+  }
+});
+
+export default fm;