A binary operator with incompatible types was detected. Found operand types 'Edm.Guid' and 'Edm.String' for operator kind 'Equal'

Question

I am getting the following exception when calling OData from my Kendo ListView:

"A binary operator with incompatible types was detected. Found operand types 'Edm.Guid' and 'Edm.String' for operator kind 'Equal'"

DECODED FILTER:
$filter=OrganizationId eq '4c2c1c1e-1838-42ca-b730-399816de85f8'

ENCODED FILTER:
%24filter=OrganizationId+eq+%274c2c1c1e-1838-42ca-b730-399816de85f8%27

HAVE ALSO UNSUCESSFULLY TRIED THESE FILTERS:
$filter=OrganizationId eq guid'4c2c1c1e-1838-42ca-b730-399816de85f8'
$filter=OrganizationId eq cast('4c2c1c1e-1838-42ca-b730-399816de85f8', Edm.Guid)

MY WEB API CALL LOOKS LIKE:

// GET: odata/Sites
[HttpGet]
[EnableQuery]
public IHttpActionResult GetSites(ODataQueryOptions<Site> queryOptions)
{
    IQueryable<Site> sites = null;

    try
    {
        queryOptions.Validate(_validationSettings);
        sites = _siteService.GetAll().OrderBy(x => x.SiteName);

        if (sites == null)
            return NotFound();
    }
    catch (ODataException ex)
    {
        TraceHandler.TraceError(ex);
        return BadRequest(ex.Message);
    }

    return Ok(sites);
}

MY JAVASCRIPT KENDO DATASOURCE LOOKS LIKE:

var dataSource = new kendo.data.DataSource({

    filter: { field: "OrganizationId", operator: "eq", value: that.settings.current.customer.id },
    schema: {
        data: function (data) {
            return data.value;
        },
        total: function (data) {
            return data.length;
        }
    },
    serverFiltering: true,
    serverPaging: true,
    transport: {
        parameterMap: function (options, type) {

            var paramMap = kendo.data.transports.odata.parameterMap(options);

            // Remove invalid Parameters that Web API doesn't support
            delete paramMap.$inlinecount; // <-- remove inlinecount
            delete paramMap.$format; // <-- remove format
            delete paramMap.$callback; // <-- remove callback

            // PLEASE NOTICE: That I have tried reformatting unsuccessfully
            //paramMap.$filter = paramMap.$filter.replace("OrganizationId eq ", "OrganizationId eq guid");
            //paramMap.$filter = "OrganizationId eq cast('81de6144-987c-4b6f-a9bd-355cb6597fc1', Edm.Guid)";

            return paramMap;
        },
        read: {
            url: buildRoute('odata/Sites')
            , dataType: 'json'
        }
    },
    type: 'odata'
});

Answer 1

If the OData service is of protocol version V4, the correct query URL should be:

$filter=OrganizationId eq 4c2c1c1e-1838-42ca-b730-399816de85f8

No single quotes is required.

Answer 2

I ran into this error querying OData 4.0 through Microsoft Dynamics. The other answers here didn't help unfortunately, even though they are exactly right. My issue was more with handing EntityReference's in filters.

I ended up having to adjust my filter to something like this, to target the foreign key properly. In the example below 'parentaccountid' is the foreign key in the entity I was querying. 'accountid' is the primary key in the accounts entity.

/opportunities?$select=opportunityid&$filter=parentaccountid/accountid eq 5e669180-be01-e711-8118-e0071b6af2a1