Insert value in lookup column of SharePoint list using Rest

Question

Hello,

 

I have bind my dropdown list from list Department and submit data in List EmployeeInfo. I have lookup column Department in List EmployeeInfo . When I submit data it gives error using Rest Api.

 

<script type="text/javascript">

$(document).ready(function() {

BindDepartment();

$("#AddListItem").click(function (event) {

createListItem();

window.location.href = window.location.href;

//event.preventDefault();

});

});

function createListItem() {

var listName = "EmployeeInfo";

var url = _spPageContextInfo.webAbsoluteUrl;

var itemType = getItemTypeForListName(listName);

var item = {

"__metadata": { "type": itemType },

"Title": $('#txtTitle').val(),

"Department": $('#ddlDepartment option:selected').val(),

"EmpName": $('#txtEmpName').val(),

"EmpID": $('#txtEmpId').val(),

"Manager": $('#txtManager').val()

};

$.ajax({

url: url + "/_api/web/lists/getbytitle('" + listName + "')/items",

type: "POST",

contentType: "application/json;odata=verbose",

data: JSON.stringify(item),

headers: {

"Accept": "application/json;odata=verbose",

"X-RequestDigest": $("#__REQUESTDIGEST").val()

},

success: function (data) {

alert("Item updated, refreshing avilable items");

success(data);

},

error: function (data) {

alert("Ooops, an error occured. Please try again");

failure(data);

}

});

alert(url);

}

function getItemTypeForListName(name) {

return "SP.Data." + name.charAt(0).toUpperCase() + name.split(" ").join("").slice(1) + "ListItem";

}

function BindDepartment()

{

var url = _spPageContextInfo.webAbsoluteUrl;

$.ajax({

url: url + "/_api/web/lists/getbytitle('Department')/items",

type: "GET",

headers: {

"accept": "application/json;odata=verbose",

},

success: function(data){

$.each(data.d.results, function(index, item){

var listNames = "<option>" + item.Title + "</option>";

//alert(listNames);

$('#ddlDepartment').append(listNames);

});

},

error: function(error){

alert(JSON.stringify(error));

}

});

}

</script>