PouchDB and SQLite not working on iOS

[Amir Duran]

Hi @craftzdog,

I have issue with PouchDb react native sqlite adapter when using it on iOS device. I'm developing small React Native application for my SmartHome and using PouchDB to save some data locally on the phone.

The code works good when executing it on the Android device, but on the iOS device I get the following error:

WebSQL threw an error, [TypeError: sqlite.openDatabase is not a function. (In 'sqlite.openDatabase(openOpts.name, openOpts.version, openOpts.description, openOpts.size, null, onError)', 'sqlite.openDatabase' is undefined)]
- node_modules/expo/build/environment/muteWarnings.fx.js:26:24 in error
- node_modules/@sentry/utils/dist/instrument.js:104:50 in <unknown>
- node_modules/pouchdb-adapter-websql-core/node_modules/pouchdb-utils/lib/index-browser.js:457:26 in guardedConsole
- node_modules/pouchdb-adapter-websql-core/lib/index.js:239:32 in <unknown>
- node_modules/pouchdb-adapter-react-native-sqlite/lib/index.js:35:23 in ReactNativeSQLitePouch
- node_modules/pouchdb-react-native/node_modules/pouchdb-core/lib/index.js:1274:38 in PouchDB

I'm using expo project together with "expo-sqlite": "^8.0.0".

const SQLiteAdapter = SQLiteAdapterFactory(SQLite)
PouchDB.plugin(SQLiteAdapter)
PouchDB.plugin(require('pouchdb-find'));
PouchDB.plugin(require('pouchdb-upsert'));
return new PouchDB(dbName, {adapter: 'react-native-sqlite', revs_limit: 1, auto_compaction: true});

When I console log the last line or new PouchDB(...) object here is what I get:

PouchDB {
  "__opts": Object {
    "adapter": "react-native-sqlite",
    "auto_compaction": true,
    "name": "afa31ab81267925e8bd75233177a5988.db",
    "revs_limit": 1,
  },
  "_adapter": "react-native-sqlite",
  "_events": Object {},
  "_maxListeners": undefined,
  "_name": "afa31ab81267925e8bd75233177a5988.db",
  "adapter": "react-native-sqlite",
  "auto_compaction": true,
  "name": "afa31ab81267925e8bd75233177a5988.db",
  "prefix": "_pouch_",
  "taskqueue": TaskQueue$1 {
    "failed": [web_sql_went_bad: unknown],
    "isReady": false,
    "queue": Array [],
  },
}

Any idea what might be the problem?

[Amir Duran]

It seems like the bug is on this line.

On Android device sqlite is object that has attribute openDatabase which is a function. On iOS device sqlite is an object which has an object SQLite and that object has a function openDatabase.

So if I change the line 25 with the following one on the iOS device, it works normally.

return sqlite.SQLite.openDatabase(openOpts.name, openOpts.version, openOpts.description, openOpts.size, null, onError)

Is this a bug or I have misconfigured something?

[Takuya Matsuyama]

I don't know how expo-sqlite works because I made it to work with react-native-sqlite-2 as the README suggests.

[Amir Duran]

Ok I, just saw that line in Readme. I decided to go away from SQLite, PouchDB because of the issues in RN.
Thx for your comment.