ngx-indexed-db is a service that wraps IndexedDB database in an Angular service combined with the power of observables.
$ npm install ngx-indexed-dbOR
$ yarn add ngx-indexed-dbImport the NgxIndexedDBModule and set up it:
import { NgxIndexedDBModule, DBConfig } from 'ngx-indexed-db';
const dbConfig: DBConfig = {
name: 'MyDb',
version: 1,
objectStoresMeta: [{
store: 'people',
storeConfig: { keyPath: 'id', autoIncrement: true },
storeSchema: [
{ name: 'name', keypath: 'name', options: { unique: false } },
{ name: 'email', keypath: 'email', options: { unique: false } }
]
}]
};
@NgModule({
...
imports: [
...
NgxIndexedDBModule.forRoot(dbConfig)
],
...
})import { NgxIndexedDBModule, DBConfig } from 'ngx-indexed-db';
// Ahead of time compiles requires an exported function for factories
export function migrationFactory() {
// The animal table was added with version 2 but none of the existing tables or data needed
// to be modified so a migrator for that version is not included.
return {
1: (db, transaction) => {
const store = transaction.objectStore('people');
store.createIndex('country', 'country', { unique: false });
},
3: (db, transaction) => {
const store = transaction.objectStore('people');
store.createIndex('age', 'age', { unique: false });
}
};
}
const dbConfig: DBConfig = {
name: 'MyDb',
version: 3,
objectStoresMeta: [{
store: 'people',
storeConfig: { keyPath: 'id', autoIncrement: true },
storeSchema: [
{ name: 'name', keypath: 'name', options: { unique: false } },
{ name: 'email', keypath: 'email', options: { unique: false } }
]
}, {
// animals added in version 2
store: 'animals',
storeConfig: { keyPath: 'id', autoIncrement: true },
storeSchema: [
{ name: 'name', keypath: 'name', options: { unique: true } },
]
}],
// provide the migration factory to the DBConfig
migrationFactory
};
@NgModule({
...
imports: [
...
NgxIndexedDBModule.forRoot(dbConfig)
],
...
})Import and inject the service:
import { NgxIndexedDBService } from 'ngx-indexed-db';
...
export class AppComponent {
constructor(private dbService: NgxIndexedDBService){
}
}We cover several common methods used to work with the IndexedDB
Adds new entry in the store and returns item added
- @param storeName The name of the store to add the item
- @param value The entry to be added
- @param key The optional key for the entry
It publishes in the observable the key value of the entry
this.dbService
.add('people', {
name: `Bruce Wayne`,
email: `[email protected]`,
})
.subscribe((key) => {
console.log('key: ', key);
});In the previous example I'm using undefined as the key because the key is configured in the objectStore as auto-generated.
Adds new entries in the store and returns its key
- @param storeName The name of the store to add the item
- @param values The entries to be added containing optional key attribute
this.dbService
.bulkAdd('people', [
{
name: `charles number ${Math.random() * 10}`,
email: `email number ${Math.random() * 10}`,
},
{
name: `charles number ${Math.random() * 10}`,
email: `email number ${Math.random() * 10}`,
},
])
.subscribe((result) => {
console.log('result: ', result);
});Delete multiple items in the store
- @param storeName The name of the store to delete the items
- @param keys The entries keys to be deleted
this.dbService.bulkDelete('people', [5, 6]).subscribe((result) => {
console.log('result: ', result);
});Retrieve multiple entries in the store
- @param storeName The name of the store to retrieve the items
- @param keys The ids entries to be retrieve
this.dbService.bulkGet('people', [1, 3, 5]).subscribe((result) => {
console.log('results: ', result);
});Adds or updates a record in store with the given value and key. Return all items present in the store
- @param storeName The name of the store to update
- @param items The values to update in the DB
@Return The return value is an Observable with the primary key of the object that was last in given array
@error If the call to bulkPut fails the transaction will be aborted and previously inserted entities will be deleted
this.dbService.bulkPut('people', people).subscribe((result) => {
console.log('result: ', result);
});Adds or updates a record in store with the given value and key. Return item updated
- @param storeName The name of the store to update
- @param value The new value for the entry
this.dbService
.update('people', {
id: 1,
email: '[email protected]',
name: 'Luke Skywalker',
})
.subscribe((storeData) => {
console.log('storeData: ', storeData);
});Returns entry by key.
- @param storeName The name of the store to query
- @param key The entry key
this.dbService.getByKey('people', 1).subscribe((people) => {
console.log(people);
});Return all elements from one store
- @param storeName The name of the store to select the items
this.dbService.getAll('people').subscribe((peoples) => {
console.log(peoples);
});Returns entry by index.
- @param storeName The name of the store to query
- @param indexName The index name to filter
- @param key The entry key.
this.dbService.getByIndex('people', 'name', 'Dave').subscribe((people) => {
console.log(people);
});createObjectStore(storeSchema: ObjectStoreMeta, migrationFactory?: () => { [key: number]: (db: IDBDatabase, transaction: IDBTransaction) => void }): void
Allows to crate a new object store ad-hoc
- @param storeName The name of the store to be created
- @param migrationFactory The migration factory if exists
const storeSchema: ObjectStoreMeta = {
store: 'people',
storeConfig: { keyPath: 'id', autoIncrement: true },
storeSchema: [
{ name: 'name', keypath: 'name', options: { unique: false } },
{ name: 'email', keypath: 'email', options: { unique: false } },
],
};
this.dbService.createObjectStore(storeSchema);Returns the number of rows in a store.
- @param storeName The name of the store to query
- @param keyRange The range value and criteria to apply.
this.dbService.count('people').subscribe((peopleCount) => {
console.log(peopleCount);
});Delete the store by name, return true or false.
- @param storeName The name of the store to query
this.dbService.deleteObjectStore(this.storneNameToDelete);Returns all items from the store after delete.
- @param storeName The name of the store to have the entry deleted
- @param key The key of the entry to be deleted
this.dbService.delete('people', 3).subscribe((allPeople) => {
console.log('all people:', allPeople);
});Returns true if the delete completes successfully.
- @param storeName The name of the store to have the entry deleted
- @param key The key of the entry to be deleted
this.dbService.deleteByKey('people', 3).subscribe((status) => {
console.log('Deleted?:', status);
});Returns the open cursor event
- @param storeName The name of the store to have the entries deleted
- @param keyRange The key range which the cursor should be open on
- @param direction IDB Cursor Direction to work with, default to
next
this.dbService.openCursor('people', IDBKeyRange.bound("A", "F")).subscribe((evt) => {
var cursor = (evt.target as IDBOpenDBRequest).result;
if(cursor) {
console.log(cursor.value);
cursor.continue();
} else {
console.log('Entries all displayed.');
}
});openCursorByIndex(storeName: string, indexName: string, keyRange: IDBKeyRange, direction?: IDBCursorDirection, mode?: DBMode): Observable
Open a cursor by index filter.
- @param storeName The name of the store to query.
- @param indexName The index name to filter.
- @param keyRange The range value and criteria to apply on the index.
- @param direction IDB Cursor Direction to work with, default to
next - @param mode DB Mode to work with, default to
readonly
this.dbService.openCursorByIndex('people', 'name', IDBKeyRange.only('john')).subscribe((evt) => {
var cursor = (evt.target as IDBOpenDBRequest).result;
if(cursor) {
console.log(cursor.value);
cursor.continue();
} else {
console.log('Entries all displayed.');
}
});Returns all items by an index.
- @param storeName The name of the store to query
- @param indexName The index name to filter
- @param keyRange The range value and criteria to apply on the index.
this.dbService.getAllByIndex('people', 'name', IDBKeyRange.only('john')).subscribe((allPeopleByIndex) => {
console.log('All: ', allPeopleByIndex);
});Returns the current database version.
this.dbService.getDatabaseVersion().pipe(
tap(response => console.log('Versione database => ', response)),
catchError(err => {
console.error('Error recover version => ', err);
return throwError(err);
})
).subscribe();Returns true if successfully delete all entries from the store.
- @param storeName The name of the store to have the entries deleted
this.dbService.clear('people').subscribe((successDeleted) => {
console.log('success? ', successDeleted);
});Returns true if successfully delete the DB.
this.dbService.deleteDatabase().subscribe((deleted) => {
console.log('Database deleted successfully: ', deleted);
});Returns all object store names.
this.dbService.getAllObjectStoreNames().subscribe((storeNames) => {
console.log('storeNames: ', storeNames);
});Released under the terms of the MIT License.
Thanks goes to these wonderful people (emoji key):
 Angelo Parziale 🚧 💻 |
 Charles Assunção 💻 📖 🚧 |
 coolweb 🚧 |
This project follows the all-contributors specification. Contributions of any kind welcome!