first of all, the interface looks like this:

VersionOSID:

now the backend requirements are as follows:
when submitting: the value of OS is to be passed to the backend using name, that is, vMub model = "osName" I bind to the corresponding name, so I can"t get the Version drop-down? (because the id of os must be passed to get the Version drop-down content.) so is there any good solution?