create_database has an additional parameter for collation

When creating a database you can now optionally specify the collation
used instead of having to rely on the server's default collation. The
latter is not always ideal when dealing with legacy systems.

Author: muloka

lib/active_record/connection_adapters/sqlserver/database_statements.rb

@@ -278,8 +278,12 @@ def drop_database(database)
           end
         end
 
-        def create_database(database)
-          do_execute "CREATE DATABASE #{quote_table_name(database)}"
+        def create_database(database, collation=@connection_options[:collation])
+          if collation
+            do_execute "CREATE DATABASE #{quote_table_name(database)} COLLATE #{collation}"
+          else
+            do_execute "CREATE DATABASE #{quote_table_name(database)}"
+          end
         end
 
         def current_database

test/cases/database_statements_test_sqlserver.rb

@@ -0,0 +1,49 @@
+require 'cases/sqlserver_helper'
+ 
+class DatabaseStatementsTestSqlserver < ActiveRecord::TestCase
+ 
+  self.use_transactional_fixtures = false
+ 
+  setup do
+    @connection = ActiveRecord::Base.connection
+  end
+ 
+  should 'create database' do
+    @connection.create_database 'activerecord_unittest3' #, 'SQL_Latin1_General_CP1_CI_AS'
+    database_name = @connection.select_value "SELECT name FROM master.dbo.sysdatabases WHERE name = 'activerecord_unittest3'"
+    puts @connection.select_value "SELECT DATABASEPROPERTYEX('activerecord_unittest3', 'Collation') SQLCollation"
+    assert_equal 'activerecord_unittest3', database_name
+  end
+ 
+  should 'drop database' do
+    @connection.drop_database 'activerecord_unittest3'
+    database_name = @connection.select_value "SELECT name FROM master.dbo.sysdatabases WHERE name = 'activerecord_unittest3'"
+    assert_equal nil, database_name
+  end
+ 
+  context 'with collation' do
+    teardown do
+      @connection.drop_database 'activerecord_unittest3'
+    end
+ 
+    should 'create database with default collation for the server' do
+      @connection.create_database 'activerecord_unittest3'
+      default_collation = @connection.select_value "SELECT SERVERPROPERTY('Collation')"
+      database_collation = @connection.select_value "SELECT DATABASEPROPERTYEX('activerecord_unittest3', 'Collation') SQLCollation"
+      assert_equal default_collation, database_collation
+    end
+ 
+    should 'create database with collation set by the method' do
+      @connection.create_database 'activerecord_unittest3', 'SQL_Latin1_General_CP1_CI_AS'
+      collation = @connection.select_value "SELECT DATABASEPROPERTYEX('activerecord_unittest3', 'Collation') SQLCollation"
+      assert_equal 'SQL_Latin1_General_CP1_CI_AS', collation
+    end
+ 
+    should 'create database with collation set by the config' do
+      @connection.instance_variable_get(:@connection_options)[:collation] = 'SQL_Latin1_General_CP1_CI_AS'
+      @connection.create_database 'activerecord_unittest3'
+      collation = @connection.select_value "SELECT DATABASEPROPERTYEX('activerecord_unittest3', 'Collation') SQLCollation"
+      assert_equal 'SQL_Latin1_General_CP1_CI_AS', collation
+    end
+  end
+end

test/config.yml

@@ -9,6 +9,7 @@ default_connection_info: &default_connection_info
   username: <%= ENV['ACTIVERECORD_UNITTEST_USER'] || 'rails' %>
   password: <%= ENV['ACTIVERECORD_UNITTEST_PASS'] || '' %>
   azure: <%= !ENV['ACTIVERECORD_UNITTEST_AZURE'].nil? %>
+  collation: <%= ENV['ACTIVERECORD_UNITTEST_COLLATION'] || nil %>
 
 connections: