DevExtreme Vue - Update Data

DevExtreme DataSource

DevExtreme Data Layer components can perform two types of data operations: shaping (sorting, filtering, grouping) and modification (creation, update, deletion).

Data Shaping

Data shaping is implemented by the DataSource component and its methods. To call them, get a DataSource instance from your UI component using the getDataSource() method. Alternatively, you can use a standalone instance saved in a constant/component property when you created the DataSource.

The following code obtains a DataSource instance using both approaches and calls one of the data shaping methods—filter(filterExpr). Such methods only set up data shaping settings. To apply them, the load() method is called.

  • Using a standalone DataSource instance

    App.vue
    • <template>
    • <!-- ... -->
    • </template>
    • <script>
    • import DataSource from 'devextreme/data/data_source';
    • const dataSource = new DataSource({
    • // ...
    • // DataSource is configured here
    • // ...
    • });
    •  
    • export default {
    • data() {
    • return {
    • dataSource
    • }
    • },
    • methods: {
    • filter() {
    • dataSource.filter(['age', '>', 18]);
    • dataSource.load();
    • }
    • }
    • }
    • </script>
  • Getting a DataSource instance from the UI component (DataGrid here)

    App.vue
    • <template>
    • <DxDataGrid ...
    • ref="myDataGrid">
    • </DxDataGrid>
    • </template>
    •  
    • <script>
    • import 'devextreme/dist/css/dx.light.css';
    • import DxDataGrid from 'devextreme-vue/data-grid';
    •  
    • export default {
    • components: {
    • DxDataGrid
    • },
    • data() {
    • return {
    • // ...
    • }
    • },
    • methods: {
    • filter() {
    • const dataSource = this.$refs['myDataGrid'].instance.getDataSource();
    • dataSource.filter(['age', '>', 18]);
    • dataSource.load();
    • }
    • }
    • }
    • </script>

Data Modification

Data modification is implemented by the store and its methods. To call them, you need a store instance that you can get using the DataSource's store() method.

Stores provide three data modification methods: insert(values), update(key, values), and remove(key). Use them to edit local and remote data. Call the DataSource's reload() method afterwards to update data in the DataSource.

App.vue
  • <template>
  • <!-- ... -->
  • </template>
  • <script>
  • import DataSource from 'devextreme/data/data_source';
  • const dataSource = new DataSource({
  • // ...
  • });
  •  
  • export default {
  • // ...
  • mounted() {
  • const store = dataSource.store();
  • store.insert({ id: 1, name: "John Doe" })
  • .then(
  • (dataObj) => {
  • dataSource.reload();
  • },
  • (error) => { /* ... */ }
  • );
  •  
  • store.update(1, { name: "John Smith" })
  • .then(
  • (dataObj) => {
  • dataSource.reload();
  • },
  • (error) => { /* ... */ }
  • );
  •  
  • store.remove(1)
  • .then(
  • (key) => {
  • dataSource.reload();
  • },
  • (error) => { /* ... */ }
  • );
  • }
  • }
  • </script>
See Also

Local Array

Ensure that one- or two-way binding is used to bind the dataSource property to the array. In Vue 2 applications, use standard methods to change the array. This updates the UI component automatically. In Vue 3 applications, create a new array and assign it to the data-bound property to replace the previous array:

App.vue
  • <template>
  • <DxChart ...
  • :data-source="fruits">
  • </DxChart>
  • </template>
  •  
  • <script>
  • import DxChart from 'devextreme-vue/chart';
  •  
  • export default {
  • components: {
  • DxChart
  • },
  • data() {
  • return {
  • fruits: [
  • { fruit: 'Apples', count: 10 },
  • { fruit: 'Oranges', count: 12 },
  • { fruit: 'Lemons', count: 15 }
  • ]
  • }
  • },
  • methods: {
  • addPineapple() {
  • // Vue 2
  • this.fruits.push({ fruit: 'Pineapples', count: 3 });
  •  
  • // Vue 3
  • this.fruits = [...this.fruits, { fruit: 'Pineapples', count: 3 }];
  • }
  • }
  • }
  • </script>
See Also