[FIX] ThreadMessagesView crashing on load (#1997)

app/views/ThreadMessagesView/index.js

@@ -71,12 +71,10 @@ class ThreadMessagesView extends React.Component {
 	}
 
 	componentWillUnmount() {
+		console.countReset(`${ this.constructor.name }.render calls`);
 		if (this.mountInteraction && this.mountInteraction.cancel) {
 			this.mountInteraction.cancel();
 		}
-		if (this.loadInteraction && this.loadInteraction.cancel) {
-			this.loadInteraction.cancel();
-		}
 		if (this.syncInteraction && this.syncInteraction.cancel) {
 			this.syncInteraction.cancel();
 		}
@@ -89,13 +87,14 @@ class ThreadMessagesView extends React.Component {
 	}
 
 	// eslint-disable-next-line react/sort-comp
-	subscribeData = () => {
+	subscribeData = async() => {
 		try {
 			const db = database.active;
-			this.subObservable = db.collections
+			const subscription = await db.collections
 				.get('subscriptions')
-				.findAndObserve(this.rid);
-			this.subSubscription = this.subObservable
+				.find(this.rid);
+			const observable = subscription.observe();
+			this.subSubscription = observable
 				.subscribe((data) => {
 					this.subscription = data;
 				});
@@ -116,14 +115,14 @@ class ThreadMessagesView extends React.Component {
 					}
 				});
 		} catch (e) {
-			log(e);
+			// Do nothing
 		}
 	}
 
 	// eslint-disable-next-line react/sort-comp
 	init = () => {
 		if (!this.subscription) {
-			return;
+			this.load();
 		}
 		try {
 			const lastThreadSync = new Date();
@@ -138,6 +137,13 @@ class ThreadMessagesView extends React.Component {
 	}
 
 	updateThreads = async({ update, remove, lastThreadSync }) => {
+		// if there's no subscription, manage data on this.state.messages
+		// note: sync will never be called without subscription
+		if (!this.subscription) {
+			this.setState(({ messages }) => ({ messages: [...messages, ...update] }));
+			return;
+		}
+
 		try {
 			const db = database.active;
 			const threadsCollection = db.collections.get('threads');
@@ -198,14 +204,11 @@ class ThreadMessagesView extends React.Component {
 				rid: this.rid, count: API_FETCH_COUNT, offset: messages.length
 			});
 			if (result.success) {
-				this.loadInteraction = InteractionManager.runAfterInteractions(() => {
 				this.updateThreads({ update: result.threads, lastThreadSync });
-
 				this.setState({
 					loading: false,
 					end: result.count < API_FETCH_COUNT
 				});
-				});
 			}
 		} catch (e) {
 			log(e);
@@ -319,6 +322,7 @@ class ThreadMessagesView extends React.Component {
 	}
 
 	render() {
+		console.count(`${ this.constructor.name }.render calls`);
 		const { loading, messages } = this.state;
 		const { theme } = this.props;
 
@@ -335,7 +339,7 @@ class ThreadMessagesView extends React.Component {
 					renderItem={this.renderItem}
 					style={[styles.list, { backgroundColor: themes[theme].backgroundColor }]}
 					contentContainerStyle={styles.contentContainer}
-					keyExtractor={item => item.id}
+					keyExtractor={item => item._id}
 					onEndReached={this.load}
 					onEndReachedThreshold={0.5}
 					maxToRenderPerBatch={5}