Customization

Documentation

In this demo, a custom filter operation, "anyof", is implemented. The calculateFilterExpression function converts it into DataSource-compatible operations. The compatible and incompatible filter expressions are displayed under the FilterBuilder.

The set of available group operations is limited to "and" and "or" using the groupOperations array, and the groups’ maximum nesting level is limited to one using the maxGroupLevel.

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Backend API

<template> <div> <DxFilterBuilder :fields="fields" :value="filter" :group-operations="groupOperations" @initialized="updateTexts" @value-changed="updateTexts" > <DxCustomOperation :calculate-filter-expression="calculateFilterExpression" name="anyof" caption="Is any of" icon="check" editor-template="editorComponentTemplate" /> <template #editorComponentTemplate="{ data: conditionInfo }"> <EditorComponent :condition-info="conditionInfo"/> </template> </DxFilterBuilder> <div class="results"> <div> <b>Value</b> <pre>{{ filterText }}</pre> </div> <div> <b>DataSource's filter expression</b> <pre>{{ dataSourceText }}</pre> </div> </div> </div> </template> <script> import DxFilterBuilder, { DxCustomOperation } from 'devextreme-vue/filter-builder'; import { filter, fields } from './data.js'; import { formatValue } from './helpers.js'; import EditorComponent from './EditorComponent.vue'; export default { components: { DxFilterBuilder, DxCustomOperation, EditorComponent, }, data() { return { fields, filter, filterText: '', groupOperations: ['and', 'or'], dataSourceText: '', }; }, methods: { updateTexts(e) { this.filterText = formatValue(e.component.option('value')); this.dataSourceText = formatValue(e.component.getFilterExpression()); }, calculateFilterExpression(filterValue, field) { return filterValue && filterValue.length && Array.prototype.concat.apply([], filterValue.map((value) => [[field.dataField, '=', value], 'or'])).slice(0, -1); }, }, }; </script> <style scoped> .results { margin-top: 50px; display: flex; justify-content: space-between; } .results > div { flex-basis: 49%; max-width: 50%; background-color: rgba(191, 191, 191, 0.15); position: relative; } .results b { position: absolute; top: -25px; } .results pre { padding: 10px 20px; height: 100%; font-size: 13px; overflow: auto; box-sizing: border-box; } .dx-tagbox { min-width: 150px; } .dx-filterbuilder .dx-numberbox { width: 80px; } </style>

<template> <DxTagBox :value="conditionInfo.value" :items="categories" :input-attr="{ 'aria-label': 'Category' }" width="auto" @value-changed="onValueChanged" /> </template> <script> import DxTagBox from 'devextreme-vue/tag-box'; import { categories } from './data.js'; export default { components: { DxTagBox, }, props: { conditionInfo: { type: Object, default: () => {}, }, }, data() { return { categories, }; }, methods: { onValueChanged(e) { this.conditionInfo.setValue(e.value && e.value.length ? e.value : null); }, }, }; </script>

import { createApp } from 'vue'; import App from './App.vue'; createApp(App).mount('#app');

<!DOCTYPE html> <html> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/23.1.5/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import("./index.js"); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"> </div> </div> </body> </html>

export const filter = [ ['Category', 'anyof', ['Automation', 'Monitors']], 'or', [ ['Category', '=', 'Televisions'], 'and', ['Price', 'between', [2000, 4000]], ], ]; export const categories = [ 'Video Players', 'Televisions', 'Monitors', 'Projectors', 'Automation', ]; export const fields = [{ dataField: 'Name', }, { dataField: 'Price', dataType: 'number', format: 'currency', }, { dataField: 'Current_Inventory', dataType: 'number', caption: 'Inventory', }, { dataField: 'Category', filterOperations: ['=', 'anyof'], lookup: { dataSource: categories, }, }];