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PouchDB adapter using ReactNative SQLite as its backing store

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craftzdog/pouchdb-adapter-react-native-sqlite

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PouchDB adapter usingop-sqlite as its backing store on React Native.It's much faster than AsyncStorage.

As of v4.0.0, it no longer requires@craftzdog/pouchdb-adapter-websql-core.It now directly uses op-sqlite, so it's more efficient.

How to use

Installation

yarn add @op-engineering/op-sqlite react-native-quick-crypto @craftzdog/react-native-buffer @craftzdog/pouchdb-errors

Polyfill NodeJS APIs

Create ashim.ts file like so:

import{install}from'react-native-quick-crypto'install()

Configure babel to use the shim modules. First, you need to installbabel-plugin-module-resolver.

yarn add --dev babel-plugin-module-resolver

Then, in yourbabel.config.js, add the plugin to swap thecrypto,stream andbuffer dependencies:

plugins:[['module-resolver',{extensions:['.tsx','.ts','.js','.json'],alias:{crypto:'react-native-quick-crypto',stream:'readable-stream',buffer:'@craftzdog/react-native-buffer','pouchdb-errors':'@craftzdog/pouchdb-errors'},},],],

Then restart your bundler usingyarn start --reset-cache.

Install PouchDB and adapter

Now it's ready to use PouchDB!

yarn add pouchdb-core pouchdb-mapreduce pouchdb-replication pouchdb-adapter-http pouchdb-adapter-react-native-sqlite

Createpouchdb.ts:

importPouchDBfrom'pouchdb-core'importHttpPouchfrom'pouchdb-adapter-http'importreplicationfrom'pouchdb-replication'importmapreducefrom'pouchdb-mapreduce'importsqliteAdapterfrom'pouchdb-adapter-react-native-sqlite'exportdefaultPouchDB.plugin(HttpPouch).plugin(replication).plugin(mapreduce).plugin(sqliteAdapter)

How to use PouchDB

importPouchDBfrom'./pouchdb'constpouch=newPouchDB('mydb',{adapter:'react-native-sqlite',// Other options})

Options

You can specify the following options in the PouchDB options:

  • location: The location of the SQLite database file. Seeop-sqlite's docs for more details.
  • encryptionKey: The encryption key for SQLCipher. Seeop-sqlite's docs for more details.

Troubleshootings

Fails to install crypto shim withinstall() on launch

You amy get the following error when new arch is enabled:

 (NOBRIDGE) ERROR  Error: Failed to install react-native-quick-crypto: React Native is not running on-device. QuickCrypto can only be used when synchronous method invocations (JSI) are possible. If you are using a remote debugger (e.g. Chrome), switch to an on-device debugger (e.g. Flipper) instead. (NOBRIDGE) ERROR  TypeError: Cannot read property 'install' of undefined

For now, you have to edit:

  • lib/module/NativeQuickCrypto/NativeQuickCrypto.js

And comment them out:

  // Check if we are running on-device (JSI)  // if (global.nativeCallSyncHook == null || QuickCryptoModule.install == null) {  //   throw new Error('Failed to install react-native-quick-crypto: React Native is not running on-device. QuickCrypto can only be used when synchronous method invocations (JSI) are possible. If you are using a remote debugger (e.g. Chrome), switch to an on-device debugger (e.g. Flipper) instead.');  // }

Contributing

See thecontributing guide to learn how to contribute to the repository and the development workflow.

License

MIT © Takuya Matsuyama

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