Diffs for bugfixes

git.diff

diff --git a/backend/package.json b/backend/package.json
index d0b2711..b731869 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -16,6 +16,7 @@
   "author": "Vincent Ning",
   "license": "ISC",
   "dependencies": {
+    "cors": "^2.8.5",
     "express": "^4.16.4",
     "express-graphql": "^0.7.1",
     "graphql": "^14.1.1",
diff --git a/backend/src/data/resolvers.js b/backend/src/data/resolvers.js
index 6376c27..f20e042 100644
--- a/backend/src/data/resolvers.js
+++ b/backend/src/data/resolvers.js
@@ -12,7 +12,7 @@ const resolverMap = {
   },
   Mutation: {
     upvotePost(_, { postId }) {
-      const post = find(Posts, { id: postId });
+      const post = find(Posts, { id: Number(postId) });
       if (!post) {
         throw new Error(`Couldn't find post with id ${postId}`);
       }
diff --git a/backend/src/server.js b/backend/src/server.js
index 02f6a22..a0d73bb 100644
--- a/backend/src/server.js
+++ b/backend/src/server.js
@@ -4,6 +4,7 @@ import resolverMap from './data/resolvers';
 import { makeExecutableSchema } from 'graphql-tools';
 import fs from 'fs';
 import path from 'path';
+import cors from 'cors';
 
 const schema = fs.readFileSync(path.join(__dirname, 'data/schema.graphql')).toString();
 
@@ -13,6 +14,7 @@ const MySchema = makeExecutableSchema({
 });
 
 const app = express();
+app.use(cors());
 
 app.use('/graphql', graphqlHTTP({
   schema: MySchema,
diff --git a/frontend/src/App.js b/frontend/src/App.js
index a8ccb4e..265d414 100644
--- a/frontend/src/App.js
+++ b/frontend/src/App.js
@@ -30,21 +30,21 @@ class App extends Component {
     return <div>loading...</div>;
   }
 
-  upvote(postId) {
-    const query = "mutation($postId:ID!) {upvotePost(postId:$postId) { id }}";
+  upvote = (postId) => {
+    const query = "mutation($postId:ID!) {upvotePost(postId:$postId) { id votes }}";
     const variables = { postId };
     fetchFromServer({ query, variables }).then(res => res.json()).then(res => {
       const posts = this.state.posts;
       posts.forEach(p => {
         if (p.id === postId) {
-          p.votes = res.upvotePost.votes;
+          p.votes = res.data.upvotePost.votes;
         }
       });
       this.setState({ posts });
     });
   }
 
-  renderPost(post) {
+  renderPost = (post) => {
     const author = `${post.author.firstName} ${post.author.lastName}`;
     return <li key={post.id}>
       <span>"{post.title}" submitted by {author}</span>