fix: detect database number for Heroku Redis

Close #55, #52

README.md

@@ -40,6 +40,16 @@ $ npm install
 $ npm run deploy
 ```
 
+## Connect to Heroku
+Medis can connect to Heroku Redis addon to manage your data. You just need to call `heroku redis:credentials --app APP` to get your redis credential:
+
+```shell
+$ heroku redis:credentials --app YOUR_APP
+redis://x:PASSWORD@HOST:PORT
+```
+
+And then input `HOST`, `PORT` and `PASSWORD` to the connection tab.
+
 ## I Love This. How do I Help?
 
 * Simply star this repository :-)

client/components/main/Main/Database/KeyBrowser/Footer.jsx

@@ -22,19 +22,16 @@ class Footer extends React.Component {
 
   updateDBCount() {
     this.props.redis.config('get', 'databases', (err, res) => {
-      if (!err) {
-        if (res[1]) {
-          this.setState({ databases: Number(res[1]) });
-        } else {
-          const redis = this.props.redis.duplicate();
-          const select = redis.select.bind(redis);
-          this.guessDatabaseNumber(select, 15).then((count) => {
-            console.log('===', count)
-            return typeof count === 'number' ? count : this.guessDatabaseNumber(select, 1, 0);
-          }).then((count) => {
-            this.setState({ databases: count + 1 });
-          });
-        }
+      if (!err && res[1]) {
+        this.setState({ databases: Number(res[1]) });
+      } else {
+        const redis = this.props.redis.duplicate();
+        const select = redis.select.bind(redis);
+        this.guessDatabaseNumber(select, 15).then((count) => {
+          return typeof count === 'number' ? count : this.guessDatabaseNumber(select, 1, 0);
+        }).then((count) => {
+          this.setState({ databases: count + 1 });
+        });
       }
     });
   }