Print('query hash: $rows') // still get nothing. final String hashToCheckHex = hash.map((byte) => byte.toRadixString(16).padLeft(2, '0')).join('') ĭatabase?.query('Books', where: 'hex(hash) = ?', whereArgs: ).then( I have tried use hexHash to query the database, and still get nothing back. how to create multiple relational tables with primary and foreign key. This project shows - how to initialize sqflite local database. Learn how to use sqflite to store complex relational data locally in Flutter apps. So, why is the hash-query result is empty? The right way to use SQLite in Flutter Apps using sqflite package with examples Install Package Initialize Sqlite Database Create a Table Write data to. Flutter SQLite Database - Persist Data with sqflite. I can ensure all the table names and column names are correct without spelling error. For this article, you’ll need the sqflite package for using the SQLite database. Print('query hash: $rows') // here print a empty list '' flutter create sqlitedemo cd sqlitedemo Next, add the required dependencies. Build, test, and deploy beautiful mobile, web, desktop, and embedded experiences from a single codebase. SQLite is a fast relational database that can be used to store data offline for mobile applications. use the 'hash' from query result as a known existed value to do the next query:ĭatabase?.query('Books', where: 'hash = ?', whereArgs: ).then( Flutter transforms the development process. Flutter & SQLite: CRUD Example (updated) Updated: AugBy: A Goodman 34 comments. In SQFlite we perform many operations like create, delete, update, etc. Print('hash: $hash') // the printed hash is correct, 16 bytes array S QFlite is a plugin in flutter which is used to store the data. The sqlite database table is created as: CREATE TABLE Books (id INTEGER PRIMARY KEY AUTOINCREMENT, path TEXT, hash blob) ĬREATE UNIQUE INDEX path_uni ON Books(path) ĬREATE UNIQUE INDEX hash_uni ON Books(hash) Īnd after insert some data into the database, I tried querying the 'hash' column as below: final int id = 1 ĭatabase?.query('Books', where: 'id= ?', whereArgs: ).then(įinal hash = rows.first as Uint8List

Flutter sqflite