harmony 鸿蒙Distributed Data Management Subsystem JS API Changelog

2023-06-24
浏览 (573)

Distributed Data Management Subsystem JS API Changelog

cl.distributeddatamgr.1 API Change

Changed the relationalStore APIs of the distributed data management (distributeddatamgr) subsystem.

Before change: After getRdbStore() is called, the application determines whether the RDB store is newly created based on the openStatus attribute (openStatus == ON_CREATE) of the returned rdbStore object. After change: After getRdbStore() is called, the application determines whether the RDB store is newly created based on the version attribute (version == 0) of the returned rdbStore object.

You need to adapt your application.

Change Impact

The JS APIs of API version 10 are affected and need to be changed accordingly. Otherwise, certain functions cannot be properly implemented in the SDK of the new version.

Key API/Component Changes

Module	Class	Method/Attribute/Enum/Constant	Change Type
@ohos.data.relationalStore	RdbStore	openStatus: number; is changed to version: number;.	Changed

Adaptation Guide

Refer to the following code to set or obtain the RDB store version for an application:

const STORE_CONFIG = {
    name: "rdbstore.db",
    securityLevel: data_rdb.SecurityLevel.S1
}
data_rdb.getRdbStore(this.context, STORE_CONFIG, function (err, rdbStore) {
    // Before:
    // if (rdbStore.openStatus == ON_CREATE) {
    //     rdbStore.executeSql("CREATE TABLE IF NOT EXISTS student (id INTEGER PRIMARY KEY AUTOINCREMENT, score REAL);", null) // create table xxx
    // }
    
    // Now:
    if (rdbStore.version == 0) {
        rdbStore.executeSql("CREATE TABLE IF NOT EXISTS student (id INTEGER PRIMARY KEY AUTOINCREMENT, score REAL);", null) // create table xxx
        // Set the RDB store version, which is a positive integer greater than 0.
        rdbStore.version == 3
    }
    // Obtain the RDB store version.
    console.info("Get RdbStore version is " + rdbStore.version)
})