Is this what you want?

Nope. We have ‘option source’ in the Search properties of the fields. When I select the Option source as Model, I should get options to select the model. But I don’t see any option for Account Models

Oh I see. You want to limit to only Accounts for the whatid?

yes.

Here’s the snippet you need for this for this as to be custom rendered.

// Define the possible target objects var targetObjects = ='Account']; // Render as a Picklist instead of an Autocomplete? var renderAsPicklist = false; var field = argumentst0], value = skuid.utils.decodeHTML(argumentst1]), metadata = field.metadata, $ = skuid.$; if (field.mode == 'edit') { // Limit the set of target objects var targets = , uniqueTargets = {}; $.each(metadata.referenceTo,function(i,r){ if (($.inArray(r.objectName,targetObjects) != -1) && (!uniqueTargetstr.objectName])) { targets.push(r); uniqueTargetstr.objectName] = 1; if (targets.length == targetObjects.length) return false; } }); if (targets.length) { // Make this field render as a picklist? if (renderAsPicklist) field.options.type = 'REFPICK'; // Override the current referenceTo metadata.referenceTo.length = 0; metadata.ref = $.map(targets,function(targ){return targ.objectName;}).join(); metadata.referenceTo = targets; } } // Run the standard renderer skuid.ui.fieldRenderersrmetadata.displaytype]efield.mode](field,value);