Fixed that schema changes while the database was open would break any...

Fixed that schema changes while the database was open would break any connections to a SQLite database (now we reconnect if that error is throw) [DHH]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3998 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb

@@ -134,14 +134,7 @@ def quote_column_name(name) #:nodoc:
       # DATABASE STATEMENTS ======================================
 
       def execute(sql, name = nil) #:nodoc:
-        log(sql, name) { @connection.execute(sql) }
-      rescue ActiveRecord::StatementInvalid => exception
-        if exception.message =~ /database schema has changed/
-          reconnect!
-          retry
-        else
-          raise
-        end
+        catch_schema_changes { log(sql, name) { @connection.execute(sql) } }
       end
 
       def update(sql, name = nil) #:nodoc:
@@ -179,15 +172,15 @@ def select_one(sql, name = nil) #:nodoc:
 
 
       def begin_db_transaction #:nodoc:
-        @connection.transaction
+        catch_schema_changes { @connection.transaction }
       end
       
       def commit_db_transaction #:nodoc:
-        @connection.commit
+        catch_schema_changes { @connection.commit }
       end
 
       def rollback_db_transaction #:nodoc:
-        @connection.rollback
+        catch_schema_changes { @connection.rollback }
       end
 
 
@@ -337,6 +330,17 @@ def copy_table_contents(from, to, columns, rename = {}) #:nodoc:
             @connection.execute sql
           end
         end
+        
+        def catch_schema_changes
+          return yield
+        rescue ActiveRecord::StatementInvalid => exception
+          if exception.message =~ /database schema has changed/
+            reconnect!
+            retry
+          else
+            raise
+          end
+        end
     end
     
     class SQLite2Adapter < SQLiteAdapter # :nodoc: