I need some help about make a field dependant of another one. I explain it with an example.
I have a custom module that have some fields, for example: field A, field B and C. In this case the field A has a defined value (this value gets in from another module). Since first moment B and C hasn't values.
The value of B, I need that depends value's of field A. And the same with B and C. The value of C, I need that depends value's of field B.
A -> B and B -> C
I need some help please, I don't have ideas for resolve it. :? :? :? :? :?
Thank you for all.
Regards.