diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb')
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb | 111 |
1 files changed, 56 insertions, 55 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb index c90915c509..6e631ed9f7 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb @@ -9,17 +9,26 @@ module ActiveRecord # Converts an arel AST to SQL def to_sql(arel, binds = []) if arel.respond_to?(:ast) - binds = binds.dup - visitor.accept(arel.ast) do - quote(*binds.shift.reverse) - end + collected = visitor.accept(arel.ast, collector) + collected.compile(binds.dup, self) else arel end end + # This is used in the StatementCache object. It returns an object that + # can be used to query the database repeatedly. + def cacheable_query(arel) # :nodoc: + if prepared_statements + ActiveRecord::StatementCache.query visitor, arel.ast + else + ActiveRecord::StatementCache.partial_query visitor, arel.ast, collector + end + end + # Returns an ActiveRecord::Result instance. def select_all(arel, name = nil, binds = []) + arel, binds = binds_from_relation arel, binds select(to_sql(arel, binds), name, binds) end @@ -39,13 +48,13 @@ module ActiveRecord # Returns an array of the values of the first column in a select: # select_values("SELECT id FROM companies LIMIT 3") => [1,2,3] def select_values(arel, name = nil) - select_rows(to_sql(arel, []), name) - .map { |v| v[0] } + arel, binds = binds_from_relation arel, [] + select_rows(to_sql(arel, binds), name, binds).map(&:first) end # Returns an array of arrays containing the field values. # Order is the same as that returned by +columns+. - def select_rows(sql, name = nil) + def select_rows(sql, name = nil, binds = []) end undef_method :select_rows @@ -74,6 +83,11 @@ module ActiveRecord exec_query(sql, name, binds) end + # Executes the truncate statement. + def truncate(table_name, name = nil) + raise NotImplementedError + end + # Executes update +sql+ statement in the context of this connection using # +binds+ as the bind substitutes. +name+ is logged along with # the executed +sql+ statement. @@ -184,7 +198,7 @@ module ActiveRecord # * You are creating a nested (savepoint) transaction # # The mysql, mysql2 and postgresql adapters support setting the transaction - # isolation level. However, support is disabled for mysql versions below 5, + # isolation level. However, support is disabled for MySQL versions below 5, # because they are affected by a bug[http://bugs.mysql.com/bug.php?id=39170] # which means the isolation level gets persisted outside the transaction. def transaction(options = {}) @@ -194,58 +208,30 @@ module ActiveRecord if options[:isolation] raise ActiveRecord::TransactionIsolationError, "cannot set isolation when joining a transaction" end - yield else - within_new_transaction(options) { yield } + transaction_manager.within_new_transaction(options) { yield } end rescue ActiveRecord::Rollback # rollbacks are silently swallowed end - def within_new_transaction(options = {}) #:nodoc: - transaction = begin_transaction(options) - yield - rescue Exception => error - rollback_transaction if transaction - raise - ensure - begin - commit_transaction unless error - rescue Exception - rollback_transaction - raise - end - end + attr_reader :transaction_manager #:nodoc: - def current_transaction #:nodoc: - @transaction - end + delegate :within_new_transaction, :open_transactions, :current_transaction, :begin_transaction, :commit_transaction, :rollback_transaction, to: :transaction_manager def transaction_open? - @transaction.open? - end - - def begin_transaction(options = {}) #:nodoc: - @transaction = @transaction.begin(options) - end - - def commit_transaction #:nodoc: - @transaction = @transaction.commit - end - - def rollback_transaction #:nodoc: - @transaction = @transaction.rollback + current_transaction.open? end def reset_transaction #:nodoc: - @transaction = ClosedTransaction.new(self) + @transaction_manager = TransactionManager.new(self) end # Register a record with the current transaction so that its after_commit and after_rollback callbacks # can be called. def add_transaction_record(record) - @transaction.add_record(record) + current_transaction.add_record(record) end # Begins the transaction (and turns off auto-committing). @@ -272,7 +258,18 @@ module ActiveRecord # Rolls back the transaction (and turns on auto-committing). Must be # done if the transaction block raises an exception or returns false. - def rollback_db_transaction() end + def rollback_db_transaction + exec_rollback_db_transaction + end + + def exec_rollback_db_transaction() end #:nodoc: + + def rollback_to_savepoint(name = nil) + exec_rollback_to_savepoint(name) + end + + def exec_rollback_to_savepoint(name = nil) #:nodoc: + end def default_sequence_name(table, column) nil @@ -288,11 +285,11 @@ module ActiveRecord def insert_fixture(fixture, table_name) columns = schema_cache.columns_hash(table_name) - key_list = [] - value_list = fixture.map do |name, value| - key_list << quote_column_name(name) - quote(value, columns[name]) + binds = fixture.map do |name, value| + [columns[name], value] end + key_list = fixture.keys.map { |name| quote_column_name(name) } + value_list = prepare_binds_for_database(binds).map { |_, value| quote(value) } execute "INSERT INTO #{quote_table_name(table_name)} (#{key_list.join(', ')}) VALUES (#{value_list.join(', ')})", 'Fixture Insert' end @@ -301,10 +298,6 @@ module ActiveRecord "DEFAULT VALUES" end - def limited_update_conditions(where_sql, quoted_table_name, quoted_primary_key) - "WHERE #{quoted_primary_key} IN (SELECT #{quoted_primary_key} FROM #{quoted_table_name} #{where_sql})" - end - # Sanitizes the given LIMIT parameter in order to prevent SQL injection. # # The +limit+ may be anything that can evaluate to a string via #to_s. It @@ -317,7 +310,7 @@ module ActiveRecord def sanitize_limit(limit) if limit.is_a?(Integer) || limit.is_a?(Arel::Nodes::SqlLiteral) limit - elsif limit.to_s =~ /,/ + elsif limit.to_s.include?(',') Arel.sql limit.to_s.split(',').map{ |i| Integer(i) }.join(',') else Integer(limit) @@ -325,8 +318,8 @@ module ActiveRecord end # The default strategy for an UPDATE with joins is to use a subquery. This doesn't work - # on mysql (even when aliasing the tables), but mysql allows using JOIN directly in - # an UPDATE statement, so in the mysql adapters we redefine this to do that. + # on MySQL (even when aliasing the tables), but MySQL allows using JOIN directly in + # an UPDATE statement, so in the MySQL adapters we redefine this to do that. def join_to_update(update, select) #:nodoc: key = update.key subselect = subquery_for(key, select) @@ -351,8 +344,9 @@ module ActiveRecord # Returns an ActiveRecord::Result instance. def select(sql, name = nil, binds = []) + exec_query(sql, name, binds) end - undef_method :select + # Returns the last auto-generated ID from the affected table. def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) @@ -378,6 +372,13 @@ module ActiveRecord row = result.rows.first row && row.first end + + def binds_from_relation(relation, binds) + if relation.is_a?(Relation) && binds.empty? + relation, binds = relation.arel, relation.bind_values + end + [relation, binds] + end end end end |