add change listener in main

src/App/index.js

@@ -42,6 +42,17 @@ const go = () => {
   };
 
   const realm = new Realm(configg);
+
+  const dogs = realm.objects('Dog');
+  console.log(`Renderer: Number of Dog objects: ${dogs.length}`);
+
+  realm.write(() => {
+    realm.create('Dog', {
+      _id: 1,
+      name: 'Spot',
+      age: 2,
+    });
+  });
 };
 
 const App = () => {

src/electron/index.js

@@ -17,15 +17,14 @@ log.transports.file.level = 'debug';
 autoUpdater.logger = log;
 log.catchErrors();
 
-const installExtensions = async extensions => {
-  return Promise.all(
+const installExtensions = async extensions =>
+  Promise.all(
     extensions.map(extension =>
       extensionInstaller(extension)
         .then(name => console.log(`[extensionInstaller]: Installed ${name}!`))
         .catch(err => console.log('[extensionInstaller]: An error occurred: ', err)),
     ),
   );
-};
 
 const CUSTOM_PROTOCOL = 'beatconnect';
 
@@ -61,9 +60,34 @@ const main = async () => {
     path: 'my.realm',
   };
 
-  // open a synced realm
   const realm = await Realm.open(config);
 
+  realm.write(() => {
+    realm.deleteAll();
+  });
+
+  realm.write(() => {
+    realm.create('Dog', {
+      _id: 2,
+      name: 'Fido',
+      age: 5,
+    });
+  });
+
+  const dogs = realm.objects('Dog');
+  console.log(`Main: Number of Dog objects: ${dogs.length}`);
+
+  dogs.addListener((dogs, changes) => {
+    changes.insertions.forEach(index => {
+      const insertedDog = dogs[index];
+      console.log(`Main: Inserted ${insertedDog.name}`);
+    });
+
+    changes.deletions.forEach(index => {
+      console.log(`Main: Dog ${index} deleted`);
+    });
+  });
+
   mainWindow = makeMainWindow({
     content: join(__dirname, 'index.html'),
   });