Ionic3学习笔记（六）存储之使用 SQLite

目录

1. 安装

ionic cordova plugin add cordova-sqlite-storage
npm install --save @ionic-native/sqlite

./src/app/app.module.ts

import {SQLite} from "@ionic-native/sqlite";

provides

SQLite,

2. CURD操作

user.ts

export class User {

username: string;
password: string;
gender: boolean;
age: number;
intro: string;
email: string;
phone: string;
location: string;

constructor() {

}

}

data.ts

import {SQLite, SQLiteObject} from "@ionic-native/sqlite";

export class DataProvider {

myAppDatabase: SQLiteObject;

constructor(private sqlite: SQLite) {

}

initDatabase() {
this.sqlite.create({
name: 'myApp.db',
location: 'default'
}).then((database: SQLiteObject) => {
database.executeSql('CREATE TABLE IF NOT EXISTS users(email VARCHAR(320) PRIMARY KEY, username VARCHAR(20) NOT NULL, password VARCHAR(30) NOT NULL, gender BOOLEAN, age TINYINT, intro VARCHAR(300), phone CHAR(11), location VARCHAR(100));', {}).then(() => console.log('init database successfully')).catch(e => console.log(e));
this.myAppDatabase = database;
})
}

}

user-data.ts

import {Injectable} from '@angular/core';

import {SQLiteObject} from "@ionic-native/sqlite";

import {DataProvider} from "../data/data";

import {User} from "./user";

@Injectable()
export class UserDataProvider {

database: SQLiteObject;

constructor(private dataProvider: DataProvider) {
this.database = this.dataProvider.myAppDatabase;
}

insertIntoUserTable(user: User) {
this.database.executeSql('INSERT INTO users VALUES (?, ?, ?, NULL, NULL, NULL, NULL, NULL);', [user.email, user.username, user.password]).then(() => console.log('insert into users table successfully')).catch(e => console.log(e));
}

queryUserTable() {
this.database.executeSql('SELECT * FROM users;', {}).then(() => console.log('query users table successfully')).catch(e => console.log(e));
}

updateUserTable(user: User) {
this.database.executeSql('UPDATE users SET username=?, password=?, gender=?, age=?, intro=?, phone=?, location=? WHERE email=?;', [user.username, user.password, user.gender, user.age, user.intro, user.phone, user.location, user.email]).then(() => console.log('update users table successfully')).catch(e => console.log(e));
}

}