Validate Where Clause of "Query" on a feature layer

Question

Hello All,

Could anybody please let me know, if any out of box options are available with ArcGIS Server API for JavaScript, to validate the "Where" clause set for the "Query" object to run with "QueryTask" on a feature layer.

This option is available with ArcGIS Desktop - "Verify" button on "Select Features By Attributes" option.

Thanks in advance!

With Regards,
Vara Prasad.

JeffPace1 · Answer

i use executefor try {
                        task.executeForCount(q, lang.hitch(this, function(count) {
                            if (count > 200) {
                                alert('More than 200 results, please enter more specific search criteria');
                            } else if (count === 0) {
                                alert('No results');
                            }

else {
                                if(count>1){
                                alert("Found " + count + " results, building summary");
                                }
                                task.execute(q, lang.hitch(this, "searchCallback", result.layers, layerdesc, result.titleField));
                            }
                        }));
                    }
                    catch (err) {
                        console.error("onTextSearch", err);
                    }

VivekPrasad · Answer

Hi Ben,

Thanks for the reply!

Actually I am aware of this. Just wanted to know availability of any out of box options. Thanks for your time.

With Regards,
Vara P

BenFousek · Answer

I don't know of any out of the box verifier. But it's pretty easy to do it yourself against the service.esriRequest({
    url: 'http://some_service/query',
    callbackParamName: 'callback',
    content: {
        f: 'json',
        returnGeometry: false,
        returnIdsOnly: true,
        where: where
    }
}).then(function (r) {
    if (r.objectIds) {
        console.log('valid query: ' + r.objectIds.length + ' results');
    } else {
        console.log('valid query: 0 results');
    }
}, function (e) {
    console.log('invalid query', e);
});