Okay, so, the scenario is that we have a "Part" content type with the following fields:

  • Manufacturer: Taxonomy term reference
  • Manufacturer part number: Text
  • Description: Long Text

The combination of manufacturer and manufacturer part number must be unique, as follows:

  • Two products: [{Manufacturer: ABC Company, Part Number: 123}, {Manufacturer: XYZ Company, Part Number: 123}] - acceptable
  • Two products: [{Manufacturer: ABC Company, Part Number: 123}, {Manufacturer: ABC Company, Part Number: 456}] - acceptable
  • Two products: [{Manufacturer: ABC Company, Part Number: 123}, {Manufacturer: ABC Company, Part Number: 123}] - not acceptable

How do I accomplish this? I tried Unique value on multiple fields configured on both the manufacturer and manufacturer part number fields (with the same group ID) but that didn't seem to do anything.