Fix Generation of proper migration when

  ActiveRecord::Base.pluralize_table_names = false.

  Previously, generation a migration like this:

      rails g migration add_column_name_to_user name

  would not generating the correct table name.

Fixes #13426.

1 files changed, 7 insertions, 3 deletions

diff --git a/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb b/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb
index 3968acba64..d3c853cfea 100644
--- a/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb
+++ b/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb
@@ -23,16 +23,16 @@ module ActiveRecord
         case file_name
         when /^(add|remove)_.*_(?:to|from)_(.*)/
           @migration_action = $1
-          @table_name       = $2.pluralize
+          @table_name       = normalize_table_name($2)
         when /join_table/
           if attributes.length == 2
             @migration_action = 'join'
-            @join_tables      = attributes.map(&:plural_name)
+            @join_tables      = pluralize_table_names? ? attributes.map(&:plural_name) : attributes.map(&:singular_name)
 
             set_index_names
           end
         when /^create_(.+)/
-          @table_name = $1.pluralize
+          @table_name = normalize_table_name($1)
           @migration_template = "create_table_migration.rb"
         end
       end
@@ -61,6 +61,10 @@ module ActiveRecord
             raise IllegalMigrationNameError.new(file_name)
           end
         end
+
+        def normalize_table_name(_table_name)
+          pluralize_table_names? ? _table_name.pluralize : _table_name.singularize
+        end
     end
   end
 end