Controller for Preview view, used to conditionally hide fields on preview render.

preview.js

({
	/* File: ./custom/modules/Accounts/clients/base/views/preview/preview.js */

	extendsFrom: 'PreviewView',

	_renderPreview: function(model, collection, fetch, previewId){
        var self = this;

        // If there are drawers there could be multiple previews, make sure we are only rendering preview for active drawer
        if(app.drawer && !app.drawer.isActive(this.$el)){
            return;  //This preview isn't on the active layout
        }

        // Close preview if we are already displaying this model
        if(this.model && model && (this.model.get("id") == model.get("id") && previewId == this.previewId)) {
            // Remove the decoration of the highlighted row
            app.events.trigger("list:preview:decorate", false);
            // Close the preview panel
            app.events.trigger('preview:close');
            return;
        }

        if (app.metadata.getModule(model.module).isBwcEnabled) {
            // if module is in BWC mode, just return
            return;
        }

        if (model) {
            // Use preview view if available, otherwise fallback to record view
            var viewName = 'preview',
                previewMeta = app.metadata.getView(model.module, 'preview'),
                recordMeta = app.metadata.getView(model.module, 'record');
            if (_.isEmpty(previewMeta) || _.isEmpty(previewMeta.panels)) {
                viewName = 'record';
            }
            this.meta = this._previewifyMetadata(_.extend({}, recordMeta, previewMeta));

            if (fetch) {
                model.fetch({
                    //Show alerts for this request
                    showAlerts: true,
                    success: function(model) {
                		//Get the value form "Type" field, if set to 'Customer', remove 'website' field
                    	var custType = model.get('account_type');
						if (custType === 'Customer')
						{
							_.each(self.meta.panels, function(panel){
								panel.fields = _.filter(panel.fields, function(field){
									return field.name != 'website';
								});	
							});
						}
                        self.renderPreview(model, collection);
                    },
                    //The view parameter is used at the server end to construct field list
                    view: viewName
                });
            } else {
                this.renderPreview(model, collection);
            }
        }

        this.previewId = previewId;
	}
})