Change select's options depends on another select's selected value

[SemyonL95]

Hi, I have Entity Foo, Bar, Baz. Bar have foreign key to Foo, Baz to Foo and Bar, i need when i creating new Baz and select Foo's value display Bar's value that related to Foo. How can i do that?

[kamaliitm]

I'd like to know this too. Is there a idiomatic way to achieve this with builtin functions of qor, without using the plain vanilla javascript's ajax?

[kamaliitm]

Related to #5540 I believe.