Add locale options to PostgreSQL adapter DB create

This adds `locale_provider` and `locale` options to the PostgreSQL
adapter's DB creation statement.

Author: Be-ngt-oH

activerecord/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   PostgreSQL adapter create DB now supports `locale_provider` and `locale`.
+
+    *Bengt-Ove Hollaender*
+
 *   Use ntuples to populate row_count instead of count for Postgres
 
     *Jonathan Calvert*

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

@@ -12,9 +12,10 @@ def recreate_database(name, options = {}) # :nodoc:
         end
 
         # Create a new PostgreSQL database. Options include <tt>:owner</tt>, <tt>:template</tt>,
-        # <tt>:encoding</tt> (defaults to utf8), <tt>:collation</tt>, <tt>:ctype</tt>,
-        # <tt>:tablespace</tt>, and <tt>:connection_limit</tt> (note that MySQL uses
-        # <tt>:charset</tt> while PostgreSQL uses <tt>:encoding</tt>).
+        # <tt>:encoding</tt> (defaults to utf8), <tt>:locale_provider</tt>, <tt>:locale</tt>,
+        # <tt>:collation</tt>, <tt>:ctype</tt>, <tt>:tablespace</tt>, and
+        # <tt>:connection_limit</tt> (note that MySQL uses <tt>:charset</tt> while PostgreSQL
+        # uses <tt>:encoding</tt>).
         #
         # Example:
         #   create_database config[:database], config
@@ -30,6 +31,10 @@ def create_database(name, options = {})
                       " TEMPLATE = \"#{value}\""
                     when :encoding
                       " ENCODING = '#{value}'"
+                    when :locale_provider
+                      " LOCALE_PROVIDER = '#{value}'"
+                    when :locale
+                      " LOCALE = '#{value}'"
                     when :collation
                       " LC_COLLATE = '#{value}'"
                     when :ctype

activerecord/test/cases/adapters/postgresql/active_schema_test.rb

@@ -27,6 +27,10 @@ def test_create_database_with_collation_and_ctype
     assert_equal %(CREATE DATABASE "aimonetti" ENCODING = 'UTF8' LC_COLLATE = 'ja_JP.UTF8' LC_CTYPE = 'ja_JP.UTF8'), create_database(:aimonetti, encoding: :"UTF8", collation: :"ja_JP.UTF8", ctype: :"ja_JP.UTF8")
   end
 
+  def test_create_database_with_locale_provider_and_locale
+    assert_equal %(CREATE DATABASE "aimonetti" ENCODING = 'utf8' LOCALE_PROVIDER = 'builtin' LOCALE = 'C.UTF-8'), create_database(:aimonetti, locale_provider: :builtin, locale: "C.UTF-8")
+  end
+
   def test_add_index
     expected = %(CREATE UNIQUE INDEX "index_people_on_last_name" ON "people" ("last_name") WHERE state = 'active')
     assert_equal expected, add_index(:people, :last_name, unique: true, where: "state = 'active'")