@dev-plugins/react-native-mmkv - not showing the boolean data from the mmkv store

[sainjay]

Boolean data is not showing the Browser for mmkv dev plugin. Can anyone else confirm if they're facing this too?

[g-otn]

I'm facing the same problem. Using:

• react-native-mmkv: 2.12.2
• @dev-plugins/react-native-mmkv: 0.0.1
• expo: 51.0.38
• react-native: 0.74.5

[g-otn]

I believe it has to do with the dev-plugin using getString always: https://github.com/expo/dev-plugins/blob/abe7bad6d4511fab274402c7f10c067fd3e78321/packages/react-native-mmkv/src/useMMKVDevTools.ts#L62

I don't think react-native-mmkv provides a way to retrieve the type of the value you stored (string, boolean, number or ArrayBuffer), so I think a solution would be to use all getters (getBoolean, etc), and show the value of the one which didn't return undefined.

Reading their Contributing though, not sure if this will get attention anytime soon

[sainjay]

@g-otn I tried doing that in local node_module but couldn't figure out how to build.

@Kudo can we add getters for- boolean: storage.getBoolean(key) number: storage.getNumber(key)

[g-otn]

I've created a patch using patch-package as a workaround.

It seems to properly display string, numbers and booleans. However displaying Uint8Array values and editing values other than strings don't work properly.

patches/@dev-plugins+react-native-mmkv+0.0.1.patch

diff --git a/node_modules/@dev-plugins/react-native-mmkv/build/useMMKVDevTools.js b/node_modules/@dev-plugins/react-native-mmkv/build/useMMKVDevTools.js
index bb8b9e0..a556072 100644
--- a/node_modules/@dev-plugins/react-native-mmkv/build/useMMKVDevTools.js
+++ b/node_modules/@dev-plugins/react-native-mmkv/build/useMMKVDevTools.js
@@ -41,7 +41,18 @@ export function useMMKVDevTools({ errorHandler, storage = new MMKV() } = {}) {
         try {
             subscriptions.push(on('getAll', async () => {
                 const keys = storage.getAllKeys();
-                return keys?.map(key => [key, storage.getString(key)]);
+                /**
+                 * PATCH
+                 * 
+                 * Workaround to display number and boolean values.
+                 * May break edit interface, doesn't display Uint8Array values.
+                 * See https://github.com/expo/dev-plugins/issues/44
+                 */
+                return keys?.map(key => [key, 
+                    storage.getString(key) || 
+                    storage.getNumber(key)?.toString() || 
+                    storage.getBoolean(key)?.toString()
+                ]);
             }));
         }
         catch (e) {

[sainjay]

Thanks for sharing @g-otn. Works as expected!