Filtering in Vue Treegrid component

24 Mar 202315 minutes to read

Filtering allows you to view specific or related records based on filter criteria. To enable filtering in the TreeGrid, set the allowFiltering to true. Filtering options can be configured through filterSettings.

To use filter, inject the Filter module in the treegrid.

To get start quickly with filtering options, you can check on this video:

app.vue
<template>
<div id="app">
        <ejs-treegrid :dataSource='data' childMapping='subtasks' :treeColumnIndex='1' :allowFiltering='true' height='275px'>
            <e-columns>
                <e-column field='taskID' headerText='Task ID' width='90' textAlign='Right'></e-column>
                <e-column field='taskName' headerText='Task Name' width='160'></e-column>
                <e-column field='startDate' headerText='Start Date' width='90' format="yMd" textAlign='Right'></e-column>
                <e-column field='duration' headerText='Duration' width='80' textAlign='Right'></e-column>
            </e-columns>
        </ejs-treegrid>
</div>
</template>
<script>
import Vue from "vue";
import { TreeGridPlugin, Filter } from "@syncfusion/ej2-vue-treegrid";
import { sampleData } from "./datasource.js";

Vue.use(TreeGridPlugin);

export default {
  data ()  {
    return {
      data: sampleData,
    };
  },
  provide: {
      treegrid: [ Filter ]
    }
}
</script>

You can apply and clear filtering by using filterByColumn and clearFiltering methods.

To disable filtering for a particular column, set
columns.allowFiltering to false.

Filter hierarchy modes

TreeGrid provides support for a set of filtering modes with filterSettings.filterHierarchyMode property.
The below are the type of filter mode available in TreeGrid.

Parent : This is the default filter hierarchy mode in TreeGrid. The filtered records are displayed with its parent records, if the filtered records not have any parent record then the filtered records only displayed.
Child : The filtered records are displayed with its child record, if the filtered records not have any child record then the filtered records only displayed.
Both : The filtered records are displayed with its both parent and child record, if the filtered records not have any parent and child record then the filtered records only displayed.
None : The filtered records are only displayed.

app.vue
<template>
<div id="app">
 <div style="padding-top: 7px; display: inline-block">Hierarchy Mode</div>
  <div style="display: inline-block; width: 150px">
<ejs-dropdownlist id='mode' :dataSource='ddldata'  :fields='fields' :value='value' :popupHeight='height' :change='change'></ejs-dropdownlist>
</div>
        <ejs-treegrid ref='treegrid' :dataSource='data' childMapping='subtasks' :treeColumnIndex='1'  :allowFiltering='true' height='225px'>
            <e-columns>
                <e-column field='taskID' headerText='Task ID' width='75' textAlign='Right'></e-column>
                <e-column field='taskName' headerText='Task Name' width='180'></e-column>
                <e-column field='startDate' headerText='Start Date' width='90' format="yMd" textAlign='Right'></e-column>
                <e-column field='duration' headerText='Duration' width='80' textAlign='Right'></e-column>
            </e-columns>
        </ejs-treegrid>
</div>
</template>
<script>
import Vue from "vue";
import { TreeGridPlugin, Filter, TreeGridComponent  } from "@syncfusion/ej2-vue-treegrid";
import { DropDownListPlugin, ChangeEventArgs } from '@syncfusion/ej2-vue-dropdowns';
import { sampleData } from "./datasource.js";

Vue.use(TreeGridPlugin);
Vue.use(DropDownListPlugin);

export default {
  data () {
    return {
      data: sampleData,
      height: '220px',
      ddldata : [{ id: 'Parent', mode: 'Parent' },
      { id: 'Child', mode: 'Child' },
      { id: 'Both', mode: 'Both' },
      { id: 'None', mode: 'None' }
    ],
    fields: { text: 'mode', value: 'id' },
    value: 'Parent'
    };
  },
    provide: {
      treegrid: [ Filter ]
    },
    methods: {
        change: function (e: ChangeEventArgs)  {
        let mode: any = e.value;
        this.$refs.treegrid.ej2Instances.filterSettings.hierarchyMode = mode;
        this.$refs.treegrid.clearFiltering();
    }
    }
}
</script>

Initial filter

To apply the filter at initial rendering, set the filter predicate object in
filterSettings.columns.

app.vue
<template>
<div id="app">
        <ejs-treegrid :dataSource='data' childMapping='subtasks' :treeColumnIndex='1'  :allowFiltering='true'  :filterSettings='filterOptions' height='275px'>
            <e-columns>
                <e-column field='taskID' headerText='Task ID' width='75' textAlign='Right'></e-column>
                <e-column field='taskName' headerText='Task Name' width='180'></e-column>
                <e-column field='startDate' headerText='Start Date' width='90' format="yMd" textAlign='Right'></e-column>
                <e-column field='duration' headerText='Duration' width='80' textAlign='Right'></e-column>
            </e-columns>
        </ejs-treegrid>
</div>
</template>
<script>
import Vue from "vue";
import { TreeGridPlugin, Filter } from "@syncfusion/ej2-vue-treegrid";
import { sampleData } from "./datasource.js";

Vue.use(TreeGridPlugin);

export default {
  data () {
    return {
      data: sampleData,
      filterOptions: {
            columns: [{ field: 'taskName', matchCase: false, operator: 'startswith', predicate: 'and', value: 'plan' },
            { field: 'duration', matchCase: false, operator: 'equal', predicate: 'and', value: 5 }]
      }
    };
  },
    provide: {
      treegrid: [ Filter ]
    }
}
</script>

Filter operators

The filter operator for a column can be defined in the filterSettings.columns.operator property.

The available operators and its supported data types are:

Operator	Description	Supported Types
startswith	Checks whether the value begins with the specified value.	String
endswith	Checks whether the value ends with the specified value.	String
contains	Checks whether the value contains the specified value.	String
equal	Checks whether the value is equal to the specified value.	String \| Number \| Boolean \| Date
notequal	Checks for values not equal to the specified value.	String \| Number \| Boolean \| Date
greaterthan	Checks whether the value is greater than the specified value.	Number \| Date
greaterthanorequal	Checks whether a value is greater than or equal to the specified value.	Number \| Date
lessthan	Checks whether the value is less than the specified value.	Number \| Date
lessthanorequal	Checks whether the value is less than or equal to the specified value.	Number \| Date

By default, the filterSettings.columns.operator value is equal.

Change default filter operator

You can change the default filter operator by extending filterModule.filterOperatorsproperty in dataBound event. In the following sample, we have changed the default operator for string typed columns as contains from startsWith.

app.vue
<template>
<div id="app">
        <ejs-treegrid ref='treegrid':dataSource='data'  childMapping='subtasks' :treeColumnIndex='1'  :allowFiltering='true' height='275px' :dataBound='dataBound'>
            <e-columns>
                <e-column field='taskID' headerText='Task ID' width='75' textAlign='Right'></e-column>
                <e-column field='taskName' headerText='Task Name' width='180'></e-column>
                <e-column field='startDate' headerText='Start Date' width='90' format="yMd" textAlign='Right'></e-column>
                <e-column field='duration' headerText='Duration' width='80' textAlign='Right'></e-column>
            </e-columns>
        </ejs-treegrid>
</div>
</template>
<script>
import Vue from "vue";
import { TreeGridPlugin, Filter } from "@syncfusion/ej2-vue-treegrid";
import { sampleData } from "./datasource.js";

Vue.use(TreeGridPlugin);

export default {
  data ()  {
    return {
      data: sampleData,
    };
  },
   provide: {
    treegrid: [Filter]
  },
  methods: {
    dataBound(args){
    this.$refs.treegrid.ej2Instances.grid.filterModule.filterOperators.startsWith="contains"
   }
    }
  }

</script>

Diacritics

By default, treegrid ignores diacritic characters while filtering. To include diacritic characters, set the filterSettings.ignoreAccent as true.

In the following sample, type aero in Name column to filter diacritic characters.

app.vue
<template>
<div id="app">
        <ejs-treegrid :dataSource='data' childMapping='Children' :treeColumnIndex='0'  :allowFiltering='true' height='275px'  :filterSettings='filterSettings'>
            <e-columns>
                <e-column field='EmpID' headerText='Employee ID' width='90' textAlign='Right'></e-column>
                <e-column field='Name' headerText='Name' width='110'></e-column>
                <e-column field='DOB' headerText='DOB' width='90' format="yMd" textAlign='Right'></e-column>
                <e-column field='Country' width='65'></e-column>
            </e-columns>
        </ejs-treegrid>
</div>
</template>
<script>
import Vue from "vue";
import { TreeGridPlugin, Filter } from "@syncfusion/ej2-vue-treegrid";
import { diacritics } from "./datasource.js";

Vue.use(TreeGridPlugin),

export default {
  data ()  {
    return {
      data: diacritics,
       filterSettings: {
        ignoreAccent: true
      }
    };
    },
  provide: {
    treegrid: [Filter]
  }
  }
</script>