ionic run code to create databse only once - ionic-framework

Question

I created an app using ionic, and in the app I want to create and populate a database, but I want the code to run once, not everytime I open the app. Because once the databace is create for first time, no need to run recreate it again.
I googled it, I did not find an answer,
I appreciate any one has a solution.
private dboptions: any = {
name: 'ba.db',
createFromLocation: 1,
location: 'default'
}
constructor(
private sqlite: SQLite) {
this.connectDB();
}
private connectDB(): any {
this.sqlite.create(this.dboptions).then(
(db: SQLiteObject) => {
// create the table
let sql = `CREATE TABLE ba (
id INTEGER PRIMARY KEY AUTOINCREMENT,
name VARCHAR (200) NOT NULL UNIQUE,
title VARCHAR (200)`;
db.executeSql(sql, []).then(success => {
console.log('table created');
}).catch(err => {
console.log(err);
})
}
)
.catch(err => console.log(err));
}

Answer 1

User LocalStorage to check if DB is already created like this. Storage Here is the link on how to add local storage to your project.
private dboptions: any = {
name: 'ba.db',
createFromLocation: 1,
location: 'default'
}
constructor(
private sqlite: SQLite, , public storage: Storage) {
this.storage.get("isDbPresent")
.then((data) => {
console.log(data);
if (data === null) {
this.connectDB();
this.storage.get(Constants.storagekey)
}
})
}
private connectDB(): any {
this.sqlite.create(this.dboptions).then(
(db: SQLiteObject) => {
// create the table
let sql = `CREATE TABLE ba (
id INTEGER PRIMARY KEY AUTOINCREMENT,
name VARCHAR (200) NOT NULL UNIQUE,
title VARCHAR (200)`;
db.executeSql(sql, []).then(success => {
console.log('table created');
}).catch(err => {
console.log(err);
})
}
)
.catch(err => console.log(err));
}

Answer 2

add ionic Storage and save a flag when done.
in app.module.ts
import { IonicStorageModule } from '#ionic/storage';
...
imports: [
...
IonicStorageModule.forRoot()
],
...
in your component/provider
import { Storage } from '#ionic/storage';
storage.ready().then(() => {
storage.get('notFirstTime').then((notFirstTime:boolean) => {
if (!notFirstTime){
// Do what you want to do once
}
storage.set('notFirstTime', true);
})
});
...
ionic storage is persistent (when you install cordova-sqlite-storageplugin)