HaveSecureTokenMatcher: optional argument to ignore db index check

lib/shoulda/matchers/active_record/have_secure_token_matcher.rb

@@ -41,6 +41,7 @@ class HaveSecureTokenMatcher
 
         def initialize(token_attribute)
           @token_attribute = token_attribute
+          @options = { ignore_check_for_db_index: false }
         end
 
         def description
@@ -65,6 +66,11 @@ def matches?(subject)
           @errors.empty?
         end
 
+        def ignoring_check_for_db_index
+          @options[:ignore_check_for_db_index] = true
+          self
+        end
+
         private
 
         def run_checks
@@ -75,7 +81,7 @@ def run_checks
           if !has_expected_db_column?
             @errors << "missing correct column #{token_attribute}:string"
           end
-          if !has_expected_db_index?
+          if !@options[:ignore_check_for_db_index] && !has_expected_db_index?
             @errors << "missing unique index for #{table_and_column}"
           end
           @errors

spec/unit/shoulda/matchers/active_record/have_secure_token_matcher_spec.rb

@@ -58,6 +58,16 @@
       end
     end
 
+    it 'matches when called with ignoring_check_for_db_index without db index' do
+      create_table(:users) do |t|
+        t.string :token
+      end
+
+      valid_model = define_model_class(:User) { has_secure_token }
+      expect(valid_model.new).
+        to have_secure_token.ignoring_check_for_db_index
+    end
+
     it 'does not match when missing a token column' do
       create_table(:users)
       invalid_model = define_model_class(:User) { has_secure_token }