![]() WatermelonDB also supports replication but the sync protocol is pretty complex because on how it resolves conflicts. Then you can assemble the RxStorage and create a database with it: However it is part of the □ Premium Plugins which must be purchased, so to try out RxDB with React Native, you might want to use one of the other three options.įirst you have to install all dependencies via npm install rxdb rxjs rxdb-premium react-native-quick-sqlite. It is recommended to use the SQLite RxStorage because it has the best performance and is the easiest to set up. Use the SQLite RxStorage with the react-native-quick-sqlite plugin.Use the LokiJS RxStorage with the react-native-lokijs plugin.Use the memory RxStorage that stores the data inside of the JavaScript memory without persistence.There are multiple ways to use RxDB in React Native: This is great for UI-based realtime applications in a way that makes it easy to develop realtime applications like what you need in React Native. It is reactive which means that you can not only query the current state, but subscribe to all state changes like the result of a query or even a single field of a document. RxDB is an local-first, NoSQL-database for JavaScript applications. ![]() Then you have to craft a custom PouchDB class that combines these plugins: or the pouchdb-adapter-asyncstorage adapter.īecause the asyncstorage adapter is no longer maintained, it is recommended to use the native-sqlite adapter:įirst you have to install the adapter and other dependencies via npm install pouchdb-adapter-react-native-sqlite react-native-quick-sqlite react-native-quick-websql.Either use the pouchdb-adapter-react-native-sqlite adapter.The only real reason to use PouchDB in React Native, is when you want to replicate with a CouchDB or Couchbase server.īecause PouchDB is based on an adapter system for storage, there are two options to use it with React Native: The performance of PouchDB is a general bottleneck which is caused by how it has to store and fetch documents while being compliant to CouchDB. A big problem is also that PouchDB is not really maintained and major bugs like wrong query results are not fixed anymore. Also it is not easily possible to fully purge documents and so it will fill up disc space over time. For example it has to store all documents states over time which is required to replicate with CouchDB. While PouchDB is pretty mature, it has some drawbacks that blocks it from being used in a client-side React Native application. The core feature of PouchDB is the ability to do a two-way replication with any CouchDB compliant endpoint. PouchDB is a JavaScript NoSQL database that follows the API of the Apache CouchDB server database. This makes SQLite a good solution when you want to solely store data on the client, but not when you want to sync data with a server or other clients. For example it is not possible to observe queries or document fields.Īlso there is no replication method. The downside of SQLite is that it is lacking many features that are handful when using a database together with an UI based application. If that does not work for you, you might want to try the react-native-sqlite-storage project instead which is also very popular. In your code you can then import the library and create a database connection: There a different project out there that can be used, but I would recommend to use the react-native-quick-sqlite project.įirst you have to install the library into your React Native project via npm install react-native-quick-sqlite. To use SQLite in React Native, you first have to include the SQLite library itself as a plugin. Operations are written in the SQL query language and SQLite generally follows the PostgreSQL syntax. SQLite is a SQL based relational database written in C that was crafted to be embed inside of applications. Complex queries or features are not supported which makes AsyncStorage not suitable for anything more then storing simple user settings data. There is a community fork of AsyncStorage that is actively maintained and open source.ĪsyncStorage is fine when only a small amount of data needs to be stored and when no query capabilities besides the key-access are required. But it was deprecated by the React Native Team which recommends to use a community based package instead. AsyncStorage was originally included in React Native itself.
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