create_table :force => true no longer tries to drop a non-existing table

Signed-off-by: Michael Koziarski <michael@koziarski.com>

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

@@ -97,8 +97,8 @@ def create_table(table_name, options = {})
 
         yield table_definition
 
-        if options[:force]
-          drop_table(table_name, options) rescue nil
+        if options[:force] && table_exists?(table_name)
+          drop_table(table_name, options)
         end
 
         create_sql = "CREATE#{' TEMPORARY' if options[:temporary]} TABLE "

activerecord/test/cases/migration_test.rb

@@ -209,6 +209,24 @@ def test_create_table_with_primary_key_prefix_as_table_name
       ActiveRecord::Base.primary_key_prefix_type = nil
     end
 
+    uses_mocha('test_create_table_with_force_true_does_not_drop_nonexisting_table') do
+      def test_create_table_with_force_true_does_not_drop_nonexisting_table
+        if Person.connection.table_exists?(:testings2)
+          Person.connection.drop_table :testings2
+        end
+
+        # using a copy as we need the drop_table method to
+        # continue to work for the ensure block of the test
+        temp_conn = Person.connection.dup
+        temp_conn.expects(:drop_table).never
+        temp_conn.create_table :testings2, :force => true do |t|
+          t.column :foo, :string
+        end
+      ensure
+        Person.connection.drop_table :testings2 rescue nil
+      end
+    end
+
 
     # SQL Server, Sybase, and SQLite3 will not allow you to add a NOT NULL
     # column to a table without a default value.