Merge pull request #117 from koic/fix_an_incorrect_autocorrect_for_rails_presence

[Fix #116] Fix an incorrect autocorrect for `Rails/Prensence`

Author: koic

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Bug fixes
 
 * [#118](https://github.com/rubocop-hq/rubocop-rails/issues/118): Fix an incorrect autocorrect for `Rails/Validation` when attributes are specified with array literal. ([@koic][])
+* [#116](https://github.com/rubocop-hq/rubocop-rails/issues/116): Fix an incorrect autocorrect for `Rails/Presence` when `else` branch of ternary operator is not nil. ([@koic][])
 
 ## 2.3.1 (2019-08-26)
 

lib/rubocop/cop/rails/presence.rb

@@ -119,8 +119,10 @@ def message(node, receiver, other)
         def replacement(receiver, other)
           or_source = if other&.send_type?
                         build_source_for_or_method(other)
-                      else
+                      elsif other.nil? || other.nil_type?
                         ''
+                      else
+                        " || #{other.source}"
                       end
 
           "#{receiver.source}.presence" + or_source

spec/rubocop/cop/rails/presence_spec.rb

@@ -36,6 +36,8 @@
   it_behaves_like 'offense', '!a.present? ? b : a', 'a.presence || b', 1, 1
   it_behaves_like 'offense', 'a.blank? ? b : a', 'a.presence || b', 1, 1
   it_behaves_like 'offense', '!a.blank? ? a : b', 'a.presence || b', 1, 1
+  it_behaves_like 'offense', 'a.present? ? a : 1', 'a.presence || 1', 1, 1
+  it_behaves_like 'offense', 'a.blank? ? 1 : a', 'a.presence || 1', 1, 1
 
   it_behaves_like 'offense',
                   'a(:bar).map(&:baz).present? ? a(:bar).map(&:baz) : nil',