In order to implement this interaction in a structured way, a third class will need to be implemented to hold the database entry data as it is passed between the activity and the handler. The database handler will be a subclass of SQLiteOpenHelper and will provide an abstract layer between the underlying SQLite database and the activity class, with the activity calling on the database handler to interact with the database (adding, removing and querying database entries). Once completed, the application will consist of an activity and a database handler class. The database schema for the products table is outlined in Table 34-1: Column Data Type productid Integer / Primary Key/ Auto Increment productname Text productquantity Integer The productid column will act as the primary key and will be automatically assigned and incremented by the database management system. Each record in the database table will contain a unique product ID, a product description and the quantity of that product item currently in stock, corresponding to column names of “productid”, “productname” and “productquantity” respectively. The name of the database will be productID.db which, in turn, will contain a single table named products. The idea behind this application is to allow the tracking of product inventory. Id: todos.length ? todos.As is probably evident from the user interface layout designed in the preceding chapter, the example project is a simple data entry and retrieval application designed to allow the user to add, query and delete database entries. However, if you’re using SQLite bundled with the react-native-sqlite-storage library, you can add the code below to your file: module.exports = ] Ĭonst storedTodoItems = await getTodoItems(db) 60 or above, you don’t have to take any extra steps. If you’re using your device’s SQLite in React Native. For more details, please refer to the library documentation. If you run into any errors, you’ll have to open the project from Xcode and add dependencies manually. If you’re not running CocoaPods, you have to use react-native link. Pod 'react-native-sqlite-storage', :path => './node_modules/react-native-sqlite-storage' If you’re running CocoaPods, add the code below to your podfile: pod 'React', :path => './node_modules/react-native' If you’re running React Native version 0.59 or lower, you have two options to install React Native packages, depending on whether you’re using CocoaPods. If you’re using iOS, run the command below to install the necessary React Native packages: cd ios & pod install & cd. To install SQLite, run the following code in your terminal: npm install -save react-native-sqlite-storage Install React Native packages iOS To connect with SQLite, we are going to use the react-native-sqlite-storagelibrary. Let’s introduce SQLite to our application. You’ll see there are two branches in the repository, start and main. You can clone the React application and work along as you read through the article. We’ll start by creating a React Native app using TypeScript: npx react-native init MyApp -template react-native-template-typescript Note that we’ll use a set of functional components and several new hook APIs to achieve state management. ![]()
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