Update table_exists? to work with qualified table names that may include an user prefix.

Author: metaskills

CHANGELOG

@@ -1,7 +1,7 @@
 
 MASTER
 
-* 
+* Update table_exists? to work with qualified table names that may include an user prefix. [Ken Collins]
 
 
 * 2.2.10/11 * (January 22nd, 2009)
@@ -83,7 +83,7 @@ MASTER
   will run quickly. [Ken Collins]
 
 * Add views support. ActiveRecord classes can use views. The connection now has a #views method and 
-  #table_exists? will not fall back to checking views too. [Ken Collins]
+  #table_exists? will now fall back to checking views too. [Ken Collins]
 
 
 2.2.0 (November 21st, 2008)

lib/active_record/connection_adapters/sqlserver_adapter.rb

@@ -497,7 +497,7 @@ def view_table_name(table_name)
       end
 
       def table_exists?(table_name)
-        super || views.include?(table_name.to_s)
+        super || tables.include?(unqualify_table_name(table_name)) || views.include?(table_name.to_s)
       end
 
       def indexes(table_name, name = nil)

test/cases/adapter_test_sqlserver.rb

@@ -39,6 +39,17 @@ def setup
       assert @connection.supports_ddl_transactions?
     end
 
+    should 'allow owner table name prefixs like dbo. to still allow table_exists? to return true' do
+      begin
+        assert_equal 'tasks', Task.table_name
+        assert Task.table_exists?
+        Task.table_name = 'dbo.tasks'
+        assert Task.table_exists?, 'Tasks table name of dbo.tasks should return true for exists.'
+      ensure
+        Task.table_name = 'tasks'
+      end
+    end
+    
     context 'for database version' do
 
       setup do