Flutter Sembast — The Complete Crash Course

Sembast is a NoSQL persistent store database solution for single process io applications. It’s fully document-based in a single file and is loaded in memory when opened. This can be especially useful when you want to analyze databases that the user selects. In addition, it varies a bit from other solutions, that have their “own” database system and don’t directly open .db files, it can be very useful to learn. That’s why I will teach you in this article how to use it. Let’s get right into it!

Happy reading!

Note: You can find the whole source code provided in this tutorial here

Installation

The first thing we have to do after creating our app is to add sembast. To do so, we will use the command flutter pub add sembast. You should be familiar with those commands, otherwise, I recommend you to look up the basics of Flutter again.

Basic Usage

Open Database

Let’s start right away on how to open a database. A database is a single file represented by a path in the file system. That’s why we will first define a string dbPath and another variable of type DatabaseFactory. This DatabaseFactory is now used by a variable of type Database, where we will pass the dbPath String. That sounds complicated, but…