DataAbilityHelper

The DataAbilityHelper object is obtained through acquireDataAbilityHelper.

NOTE

The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version. The APIs of this module can be used only in the FA model. In the stage model, use the APIs provided by the dataAbility and dataShare modules instead.

Modules to Import

import ability from '@ohos.ability.ability';

Usage

Import the following modules based on the actual situation before using the current module:

import ohos_data_ability from '@ohos.data.dataAbility';
import relationalStore from '@ohos.data.relationalStore';

DataAbilityHelper.openFile

openFile(uri: string, mode: string, callback: AsyncCallback<number>): void

Opens a file with a specified URI. This API uses an asynchronous callback to return a file descriptor.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use FileAccessHelper.openFile instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
let mode = 'rw';
DAHelper.openFile('dataability:///com.example.DataAbility', mode, (error, data) => {
    if (error && error.code !== 0) {
        console.error(`openFile fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`openFile success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.openFile

openFile(uri: string, mode: string): Promise<number>

Opens a file with a specified URI. This API uses a promise to return a file descriptor.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use FileAccessHelper.openFile instead.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
let mode = 'rw';
DAHelper.openFile('dataability:///com.example.DataAbility', mode).then((data) => {
    console.info(`openFile data: ${JSON.stringify(data)}`);
});

DataAbilityHelper.on

on(type: 'dataChange', uri: string, callback: AsyncCallback<void>): void

Registers an observer to listen for changes in the data specified by a given URI.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.on('dataChange') instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
function onChangeNotify() {
    console.info('onChangeNotify call back');
};
DAHelper.on(
    'dataChange',
    'dataability:///com.example.DataAbility',
    onChangeNotify
);

DataAbilityHelper.off

off(type: 'dataChange', uri: string, callback?: AsyncCallback<void>): void

Deregisters the observer that listens for changes in the data specified by a given URI.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.off('dataChange') instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
function onChangeNotify() {
    console.info('onChangeNotify call back');
};
DAHelper.off(
    'dataChange',
    'dataability:///com.example.DataAbility',
    onChangeNotify
);
DAHelper.off(
    'dataChange',
    'dataability:///com.example.DataAbility',
);

DataAbilityHelper.getType

getType(uri: string, callback: AsyncCallback<string>): void

Obtains the media resource type of the data specified by a given URI. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
DAHelper.getType('dataability:///com.example.DataAbility', (error, data) => {
    if (error && error.code !== 0) {
        console.error(`getType fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`getType success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.getType

getType(uri: string): Promise<string>

Obtains the media resource type of the data specified by a given URI. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
DAHelper.getType('dataability:///com.example.DataAbility').then((data) => {
    console.info(`getType data: ${JSON.stringify(data)}`);
});

DataAbilityHelper.getFileTypes

getFileTypes(uri: string, mimeTypeFilter: string, callback: AsyncCallback<Array<string>>): void

Obtains the supported media resource types of a specified file. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
DAHelper.getFileTypes( 'dataability:///com.example.DataAbility', 'image/*', (error, data) => {
    if (error && error.code !== 0) {
        console.error(`getFileTypes fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`getFileTypes success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.getFileTypes

getFileTypes(uri: string, mimeTypeFilter: string): Promise<Array<string>>

Obtains the supported media resource types of a specified file. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
DAHelper.getFileTypes('dataability:///com.example.DataAbility', 'image/*').then((data) => {
    console.info(`getFileTypes data: ${JSON.stringify(data)}`);
});

DataAbilityHelper.normalizeUri

normalizeUri(uri: string, callback: AsyncCallback<string>): void

Converts the URI that refers to a Data ability into a normalized URI. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.normalizeUri instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
DAHelper.normalizeUri('dataability:///com.example.DataAbility', (error, data) => {
    if (error && error.code !== 0) {
        console.error(`normalizeUri fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`normalizeUri success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.normalizeUri

normalizeUri(uri: string): Promise<string>

Converts the URI that refers to a Data ability into a normalized URI. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.normalizeUri instead.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
DAHelper.normalizeUri('dataability:///com.example.DataAbility',).then((data) => {
    console.info(`normalizeUri data: ${JSON.stringify(data)}`);
});

DataAbilityHelper.denormalizeUri

denormalizeUri(uri: string, callback: AsyncCallback<string>): void

Converts a normalized URI generated by DataAbilityHelper.normalizeUri(uri: string, callback: AsyncCallback<string>) to a denormalized one. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.denormalizeUri instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
DAHelper.denormalizeUri('dataability:///com.example.DataAbility', (error, data) => {
    if (error && error.code !== 0) {
        console.error(`denormalizeUri fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`denormalizeUri success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.denormalizeUri

denormalizeUri(uri: string): Promise<string>

Converts a normalized URI generated by DataAbilityHelper.normalizeUri(uri: string) to a denormalized one. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.denormalizeUri instead.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
DAHelper.denormalizeUri('dataability:///com.example.DataAbility',).then((data) => {
    console.info(`denormalizeUri data: ${JSON.stringify(data)}`);
});

DataAbilityHelper.notifyChange

notifyChange(uri: string, callback: AsyncCallback<void>): void

Notifies the registered observer of a change to the data specified by the URI. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.notifyChange instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
DAHelper.notifyChange('dataability:///com.example.DataAbility', (error) => {
    if (error && error.code !== 0) {
        console.error(`notifyChange fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log('notifyChange success');
    }
});

DataAbilityHelper.notifyChange

notifyChange(uri: string): Promise<void>

Notifies the registered observer of a change to the data specified by the URI. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.notifyChange instead.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
DAHelper.notifyChange('dataability:///com.example.DataAbility').then(() => {
    console.info('================>notifyChangeCallback================>');
});

DataAbilityHelper.insert

insert(uri: string, valuesBucket: rdb.ValuesBucket, callback: AsyncCallback<number>): void

Inserts a single data record into the database. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.insert instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import rdb from '@ohos.data.rdb';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
const valueBucket: rdb.ValuesBucket = {
    'name': 'rose',
    'age': 22,
    'salary': 200.5,
    'blobType': 'u8',
};
DAHelper.insert('dataability:///com.example.DataAbility', valueBucket, (error, data) => {
    if (error && error.code !== 0) {
        console.error(`insert fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`insert success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.insert

insert(uri: string, valuesBucket: rdb.ValuesBucket): Promise<number>

Inserts a single data record into the database. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.insert instead.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import rdb from '@ohos.data.rdb';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
const valueBucket: rdb.ValuesBucket = {
    'name': 'rose1',
    'age': 221,
    'salary': 20.5,
    'blobType': 'u8',
};
DAHelper.insert('dataability:///com.example.DataAbility', valueBucket).then((data) => {
    console.info(`insert data: ${JSON.stringify(data)}`);
});

DataAbilityHelper.batchInsert

batchInsert(uri: string, valuesBuckets: Array<rdb.ValuesBucket>, callback: AsyncCallback<number>): void

Inserts multiple data records into the database. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.batchInsert instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import rdb from '@ohos.data.rdb';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
let cars = new Array({'name': 'roe11', 'age': 21, 'salary': 20.5, 'blobType': 'u8',} as rdb.ValuesBucket,
                     {'name': 'roe12', 'age': 21, 'salary': 20.5, 'blobType': 'u8',} as rdb.ValuesBucket,
                     {'name': 'roe13', 'age': 21, 'salary': 20.5, 'blobType': 'u8',} as rdb.ValuesBucket);
DAHelper.batchInsert('dataability:///com.example.DataAbility', cars, (error, data) => {
    if (error && error.code !== 0) {
        console.error(`batchInsert fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`batchInsert success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.batchInsert

batchInsert(uri: string, valuesBuckets: Array<rdb.ValuesBucket>): Promise<number>

Inserts multiple data records into the database. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.batchInsert instead.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import rdb from '@ohos.data.rdb';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
let cars = new Array({'name': 'roe11', 'age': 21, 'salary': 20.5, 'blobType': 'u8',} as rdb.ValuesBucket,
                     {'name': 'roe12', 'age': 21, 'salary': 20.5, 'blobType': 'u8',} as rdb.ValuesBucket,
                     {'name': 'roe13', 'age': 21, 'salary': 20.5, 'blobType': 'u8',} as rdb.ValuesBucket);
DAHelper.batchInsert('dataability:///com.example.DataAbility', cars).then((data) => {
    console.info(`batchInsert data: ${JSON.stringify(data)}`);
});

DataAbilityHelper.delete

delete(uri: string, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback<number>): void

Deletes one or more data records from the database. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.delete instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import ohos_data_ability from '@ohos.data.dataAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
let da = new ohos_data_ability.DataAbilityPredicates();
DAHelper.delete('dataability:///com.example.DataAbility', da, (error, data) => {
    if (error && error.code !== 0) {
        console.error(`delete fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`delete success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.delete

delete(uri: string, predicates?: dataAbility.DataAbilityPredicates): Promise<number>

Deletes one or more data records from the database. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.delete instead.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import ohos_data_ability from '@ohos.data.dataAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
let da = new ohos_data_ability.DataAbilityPredicates();
DAHelper.delete('dataability:///com.example.DataAbility', da).then((data) => {
    console.info(`delete data: ${JSON.stringify(data)}`);
});

DataAbilityHelper.delete

delete(uri: string, callback: AsyncCallback<number>): void

Uses a custom processing logic to delete data records from the database. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.delete instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
DAHelper.delete('dataability:///com.example.DataAbility', (error, data) => {
    if (error && error.code !== 0) {
        console.error(`delete fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`delete success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.update

update(uri: string, valuesBucket: rdb.ValuesBucket, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback<number>): void

Updates data records in the database. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.update instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import ohos_data_ability from '@ohos.data.dataAbility';
import rdb from '@ohos.data.rdb';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
const va: rdb.ValuesBucket = {
    'name': 'roe1',
    'age': 21,
    'salary': 20.5,
    'blobType': 'u8',
};
let da = new ohos_data_ability.DataAbilityPredicates();
DAHelper.update('dataability:///com.example.DataAbility', va, da, (error, data) => {
    if (error && error.code !== 0) {
        console.error(`update fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`update success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.update

update(uri: string, valuesBucket: rdb.ValuesBucket, predicates?: dataAbility.DataAbilityPredicates): Promise<number>

Updates data records in the database. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.update instead.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import ohos_data_ability from '@ohos.data.dataAbility';
import rdb from '@ohos.data.rdb';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
const va: rdb.ValuesBucket = {
    'name': 'roe1',
    'age': 21,
    'salary': 20.5,
    'blobType': 'u8',
};
let da = new ohos_data_ability.DataAbilityPredicates();
DAHelper.update('dataability:///com.example.DataAbility', va, da).then((data) => {
    console.info(`update data: ${JSON.stringify(data)}`);
});

DataAbilityHelper.update

update(uri: string, valuesBucket: rdb.ValuesBucket, callback: AsyncCallback<number>): void

Uses a custom processing logic to update data records in the database. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.update instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import rdb from '@ohos.data.rdb';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
const va: rdb.ValuesBucket = {
    'name': 'roe1',
    'age': 21,
    'salary': 20.5,
    'blobType': 'u8',
};
DAHelper.update('dataability:///com.example.DataAbility', va, (error, data) => {
    if (error && error.code !== 0) {
        console.error(`update fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`update success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.query

query(uri: string, columns: Array<string>, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback<ResultSet>): void

Queries data in the database. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.query instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import ohos_data_ability from '@ohos.data.dataAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
let cars=new Array('value1', 'value2', 'value3', 'value4');
let da = new ohos_data_ability.DataAbilityPredicates();
DAHelper.query('dataability:///com.example.DataAbility', cars, da, (error, data) => {
    if (error && error.code !== 0) {
        console.error(`query fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`query success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.query

query(uri: string, callback: AsyncCallback<ResultSet>): void

Queries data in the database. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.query instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
DAHelper.query('dataability:///com.example.DataAbility', (error, data) => {
    if (error && error.code !== 0) {
        console.error(`query fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`query success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.query

query(uri: string, columns: Array<string>, callback: AsyncCallback<ResultSet>): void

Queries data in the database. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.query instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
let cars = new Array('value1', 'value2', 'value3', 'value4');
DAHelper.query('dataability:///com.example.DataAbility', cars, (error, data) => {
    if (error && error.code !== 0) {
        console.error(`query fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`query success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.query

query(uri: string, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback<ResultSet>): void

Queries data in the database. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.query instead.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import ohos_data_ability from '@ohos.data.dataAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
let da = new ohos_data_ability.DataAbilityPredicates();
DAHelper.query('dataability:///com.example.DataAbility', da, (error, data) => {
    if (error && error.code !== 0) {
        console.error(`query fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`query success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.query

query(uri: string, columns?: Array<string>, predicates?: dataAbility.DataAbilityPredicates): Promise<ResultSet>

Queries data in the database. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model. In the stage model, use DataShareHelper.query instead.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import ohos_data_ability from '@ohos.data.dataAbility';

let DAHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.DataAbility'
);
let cars = new Array('value1', 'value2', 'value3', 'value4');
let da = new ohos_data_ability.DataAbilityPredicates();
DAHelper.query('dataability:///com.example.DataAbility', cars, da).then((data) => {
    console.info(`query data: ${JSON.stringify(data)}`);
});

DataAbilityHelper.call

call(uri: string, method: string, arg: string, extras: PacMap, callback: AsyncCallback<PacMap>): void

Calls an extended API of the DataAbility. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

let dataAbilityHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.jsapidemo.UserDataAbility'
);
dataAbilityHelper.call('dataability:///com.example.jsapidemo.UserDataAbility',
    'method', 'arg', {'key1':'value1'}, (error, data) => {
    if (error && error.code !== 0) {
        console.error(`call fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`call success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.call

call(uri: string, method: string, arg: string, extras: PacMap): Promise<PacMap>

Calls an extended API of the DataAbility. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import { BusinessError } from '@ohos.base';

let dataAbilityHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.jsapidemo.UserDataAbility'
);
dataAbilityHelper.call('dataability:///com.example.jsapidemo.UserDataAbility',
    'method', 'arg', {'key1':'value1'}).then((data) => {
    console.info('call success, data: ${data}');
}).catch((error: BusinessError) => {
    console.error('call failed, error: ${error}');
});

DataAbilityHelper.executeBatch

executeBatch(uri: string, operations: Array<DataAbilityOperation>, callback: AsyncCallback<Array<DataAbilityResult>>): void

Operates data in the database in batches. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model.

Parameters

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';

// Select the operations to be performed on the database according to the DataAbilityOperation array.
let op: Array<ability.DataAbilityOperation> = new Array();
let dataAbilityHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.jsapidemo.UserDataAbility'
);
dataAbilityHelper.executeBatch('dataability:///com.example.jsapidemo.UserDataAbility', op, (error, data) => {
    if (error && error.code !== 0) {
        console.error(`executeBatch fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`executeBatch success, data: ${JSON.stringify(data)}`);
    }
});

DataAbilityHelper.executeBatch

executeBatch(uri: string, operations: Array<DataAbilityOperation>): Promise<Array<DataAbilityResult>>

Operates data in the database in batches. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel

Model restriction: This API can be used only in the FA model.

Parameters

Return value

Example

import ability from '@ohos.ability.ability';
import featureAbility from '@ohos.ability.featureAbility';
import { BusinessError } from '@ohos.base';

// Select the operations to be performed on the database according to the DataAbilityOperation array.
let op: Array<ability.DataAbilityOperation> = new Array();
let dataAbilityHelper: ability.DataAbilityHelper = featureAbility.acquireDataAbilityHelper(
    'dataability:///com.example.jsapidemo.UserDataAbility'
);
dataAbilityHelper.executeBatch('dataability:///com.example.jsapidemo.UserDataAbility', op).then((data) => {
    console.info('executeBatch success, data: ${data}');
}).catch((error: BusinessError) => {
    console.error('executeBatch failed, error: ${error}');
});

PacMap¹¹⁺

[key: string]: number | string | boolean | Array<string | number | boolean> | null

Defines the PacMap type used for data storage.

System capability: SystemCapability.Ability.AbilityRuntime.FAModel