Fix that creating a table whose primary key prefix type is :table_name generates an incorrectly pluralized primary key.

[rails#872 state:committed]

Signed-off-by: Jeremy Kemper <jeremy@bitsweat.net>

Author: Morgan Schweers

activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb

@@ -107,7 +107,7 @@ def columns(table_name, name = nil) end
       # See also TableDefinition#column for details on how to create columns.
       def create_table(table_name, options = {})
         table_definition = TableDefinition.new(self)
-        table_definition.primary_key(options[:primary_key] || Base.get_primary_key(table_name)) unless options[:id] == false
+        table_definition.primary_key(options[:primary_key] || Base.get_primary_key(table_name.to_s.singularize)) unless options[:id] == false
 
         yield table_definition if block_given?
 

activerecord/test/cases/migration_test.rb

@@ -224,7 +224,7 @@ def test_create_table_with_primary_key_prefix_as_table_name_with_underscore
           t.column :foo, :string
       end
 
-      assert_equal %w(foo testings_id), Person.connection.columns(:testings).map { |c| c.name }.sort
+      assert_equal %w(foo testing_id), Person.connection.columns(:testings).map { |c| c.name }.sort
     ensure
       Person.connection.drop_table :testings rescue nil
       ActiveRecord::Base.primary_key_prefix_type = nil
@@ -237,7 +237,7 @@ def test_create_table_with_primary_key_prefix_as_table_name
           t.column :foo, :string
       end
 
-      assert_equal %w(foo testingsid), Person.connection.columns(:testings).map { |c| c.name }.sort
+      assert_equal %w(foo testingid), Person.connection.columns(:testings).map { |c| c.name }.sort
     ensure
       Person.connection.drop_table :testings rescue nil
       ActiveRecord::Base.primary_key_prefix_type = nil