From 1073a4bbc0fd2cff0784aa71545a8444d924ca00 Mon Sep 17 00:00:00 2001
From: kristiandupont <kristian@kristiandupont.com>
Date: Thu, 16 Feb 2017 10:53:30 +0100
Subject: [PATCH] Update index.js to report missing react-native link

---
 lib/index.js | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/lib/index.js b/lib/index.js
index 353abe3b..6bb739a9 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -23,7 +23,6 @@ function nodeRequire(module) {
     return require(module);
 }
 
-
 function getContext() {
     // If process is an object, we're probably running in Node or Electron
     // From: http://stackoverflow.com/a/24279593/1417293
@@ -36,14 +35,16 @@ function getContext() {
         return 'nodejs';
     }
 
-    // If we've already injected the Realm class, we are probably
-    // running in a jscore environment, either directly or via React Native
-    if (typeof Realm !== 'undefined') {
-        if (typeof navigator !== 'undefined' && 
-            navigator.product === 'ReactNative') { // eslint-disable-line no-undef
-            return 'reactnative';
+    if (typeof navigator !== 'undefined' && navigator.product === 'ReactNative') { // eslint-disable-line no-undef
+        if (typeof Realm === 'undefined'){
+            throw new Error('Missing Realm constructor. Did you run "react-native link realm"? Please see https://realm.io/docs/react-native/latest/#missing-realm-constructor for troubleshooting');
         }
+        return 'reactnative';
+    }
 
+    // If we're not running in React Native but we already injected the Realm class, 
+    // we are probably running in a pure jscore environment
+    if (typeof Realm !== 'undefined') {
         return 'jscore';
     }
 
@@ -89,7 +90,7 @@ switch(getContext()) {
 }
 
 if (!realmConstructor) {
-    throw new Error('Missing Realm constructor. Did you run "react-native link realm"? Please see https://realm.io/docs/react-native/latest/#missing-realm-constructor for troubleshooting');
+    throw Error("Error trying to establish execution context");
 }
 
 require('./extensions')(realmConstructor);