Deprecate `where.not` working as NOR and will be changed to NAND in Rails 6.1
`where.not` with polymorphic association is partly fixed incidentally at 213796fb (refer #33493, #26207, #17010, #16983, #14161), and I've added test case e9ba12f7 to avoid lose that fix accidentally in the future. In Rails 5.2, `where.not(polymorphic: object)` works as expected as NAND, but `where.not(polymorphic_type: object.class.polymorphic_name, polymorphic_id: object.id)` still unexpectedly works as NOR. To will make `where.not` working desiredly as NAND in Rails 6.1, this deprecates `where.not` working as NOR. If people want to continue NOR conditions, we'd encourage to them to `where.not` each conditions manually. ```ruby all = [treasures(:diamond), treasures(:sapphire), cars(:honda), treasures(:sapphire)] assert_equal all, PriceEstimate.all.map(&:estimate_of) ``` In Rails 6.0: ```ruby sapphire = treasures(:sapphire) nor = all.reject { |e| e.estimate_of_type == sapphire.class.polymorphic_name }.reject { |e| e.estimate_of_id == sapphire.id } assert_equal [cars(:honda)], nor without_sapphire = PriceEstimate.where.not( estimate_of_type: sapphire.class.polymorphic_name, estimate_of_id: sapphire.id ) assert_equal nor, without_sapphire.map(&:estimate_of) ``` In Rails 6.1: ```ruby sapphire = treasures(:sapphire) nand = all - [sapphire] assert_equal [treasures(:diamond), cars(:honda)], nand without_sapphire = PriceEstimate.where.not( estimate_of_type: sapphire.class.polymorphic_name, estimate_of_id: sapphire.id ) assert_equal nand, without_sapphire.map(&:estimate_of) ``` Resolves #31209.
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