where(undefined_key: nil) returns relation including all records

Description

Now, where(undefined_key: nil) returns all records.
But I think where(undefined_key: nil) should raise an error because

• It's same as ActiveRecord behavior.
• We cannot recognize typo and get a surprising result.

Code to reproduce

class Records < ActiveHash::Base
  self.data = [
    { id: 1, name: 'foo' },
    { id: 2, name: 'bar' },
    { id: 3, name: 'baz' }
  ]
end

pp Records.where(undefined_key: nil).to_a
# [
#    #<Records:0x00007fadaf51a5e0 @attributes={:id=>1, :name=>"foo"}>,
#    #<Records:0x00007fadaf519988 @attributes={:id=>2, :name=>"bar"}>,
#   #<Records:0x00007fadaf519348 @attributes={:id=>3, :name=>"baz"}>
# ]

Other informations

• This will be breaking change

Start with the Records.where(undefined_key: nil) reproduction and trace how where handles hash conditions. Verify the behavior against the supplied ActiveRecord comparison, then add coverage showing that an undefined key raises an error instead of returning all records. The issue does not name a source file or test file.