We will build a web application that supports local db synced with remote db. This post is a continuation from the previous post: How to Build WatermelonDB Sync Backend in Elixir.
WatermelonDB is a reactive database for React frontend application that supports data synchronization.
What I like about this database is you can bring your own sync backend (HTTP-based) as long as it complies with this spec:
| Operation | Request Params / Body | Response Body |
|---|---|---|
| Pull | - lastPulledAt: integer, Unix time in milliseconds (ms) | - changes: (JSON) - timestamp: integer, Unix time in milliseconds (ms) |
| Push | - changes: (JSON) - lastPulledAt: integer, Unix time in milliseconds (ms) | X |
The following is a brief how pull and push operation works. Please refer to Sync documentation for the details