respond_to? / methods / method_missing / instance_methods (round 4)

t = Test.new

=> #<Test id: nil, name: nil, created_at: nil, updated_at: nil>

Test.public_instance_methods - ActiveRecord::Base.public_instance_methods

=> []

t.methods - ActiveRecord::Base.public_instance_methods

=> ["updated_at", "validate_on_update", "updated_at=", "created_at?",
"name", "name=", "validate", "created_at", "created_at=", "name?",
"validate_on_create", "updated_at?"]

Test.public_instance_methods - ActiveRecord::Base.public_instance_methods

=> ["updated_at", "updated_at=", "created_at?", "name", "name=",
"created_at", "created_at=", "name?", "updated_at?"]

Test.public_instance_methods is not updated until t.methods has been
called. This would appear to be in error.