expression Object

An object which represents a filter expression which the kendo.data.DataSource can use to filter the data.

Example - set expression

<div id="filter"></div>
<br /><br />
<div id="grid"></div>
<script>
  var data = [
      { name: "Jane Doe", age: 30 },
      { name: "John Doe", age: 33 }
    ];

  var dataSource = new kendo.data.DataSource({
    data: data,
    schema: {
      model: {
        fields: {
          name: { type: "string" },
          age: { type: "number" }
        }
      }
    }
  });

  $("#filter").kendoFilter({
    dataSource: dataSource,
    expression: {
        logic: "and",
        filters: [
            { field: "name", value: "Jane Doe", operator: "eq" }
        ]
    }
  });

  $("#grid").kendoGrid({
    columns: [
      { field: "name" },
      { field: "age" }
    ],
    dataSource: dataSource
  });

  $("#filter").data("kendoFilter").applyFilter();
</script>

Example - set nested filters

<button id="btn">Apply Filter</button>
<div id="filter"></div>
<br /><br />
<div id="grid"></div>
<script>
  var data = [
    { name: "Jane Doe", age: 30 },
    { name: "John Doe", age: 33 },
    { name: "Mark Doe", age: 33 },
    { name: "Janet Peterson", age: 38 },
    { name: "Samuel Joen", age: 42 },
    { name: "Robert Michael", age: 46 }
  ];

  var dataSource = new kendo.data.DataSource({
    data: data,
    schema: {
      model: {
        fields: {
          name: { type: "string" },
          age: { type: "number" }
        }
      }
    }
  });

  $("#filter").kendoFilter({
    dataSource: dataSource,
    expression: {
      logic: "and",
      filters: [
        { field: "name", value: "J", operator: "contains" },
        // Nested filter
        {
          logic: "and",
          filters: [
            { field: "age", value: 31, operator: "gte" },
            { field: "age", value: 39, operator: "lte" }
          ]
        }
      ]
    }
  });

  $("#grid").kendoGrid({
    columns: [
      { field: "name" },
      { field: "age" }
    ],
    dataSource: dataSource
  });

  $('#btn').on('click', function(){
    $("#filter").data("kendoFilter").applyFilter();
  })

</script>