Hi,
I have a database with two collections. On my app page, I have one "select" control, and I use it to list classnames from my classes collection. Now, after I choose one, I want to list all students with the same classname(I already did the pointer thing in the database) in a "list" control right below the "select" control. How will I tell the service which item is selected in the "select" control?
Hello,
Please follow these steps:
add "list/query" service datasource on the page.
open "before send" mapping.
find "where" request parameter and click "JS" on this parameter.
populate it with following JS code:
pre
//Note you need to replace "selectName" with your select component name.
var classValue = Apperyio("selectName").val();
//Where "class" is your pointer field.
var whereObject = {"class": {"$inQuery": {_id: classValue } } };
return JSON.stringify(whereObject);
/pre
Regards.
is there a video or tutorial about this? I find it difficult to do that.
Hi,