Say, I have tables, Video and Script. Their association is
Video:1 --- n:Script
Also, Script has a field called 'value', (which is decimal, but the type
is not important here).
I want every 'value' to be unique for EACH Video. In other words,
Video1 : script-value=1, script-value=2, script-value=4 ...
is OK. But NOT
Video1 : script-value=2, script-value=2, script-value=4 ...
If I set ':value, uniqueness => true' in Script.rb, a critical problem
script-value s are unique for EACH Video, but they are not for all
Video1 : script-value:1, script-value:2, script-value:4 ...
Video2 : script-value:1, script-value:7, script-value:9 ...
Video1 and Video2 has the same script-values (=1), from which
'uniqueness => true' setting prevents.
Is there anyway to allow Videos to have the same 'value's, which however
are distinct from each other among the values that a single Video