Class: Sequel::DataObjects::Database

Inherits:
Sequel::Database show all
Defined in:
lib/sequel/adapters/do.rb

Overview

DataObjects uses it’s own internal connection pooling in addition to the pooling that Sequel uses. You should make sure that you don’t set the connection pool size to more than 8 for a Sequel::DataObjects::Database object, or hack DataObjects (or Extlib) to use a pool size at least as large as the pool size being used by Sequel.

Constant Summary collapse

DISCONNECT_ERROR_RE = 
/terminating connection due to administrator command/

Constants inherited from Sequel::Database

Sequel::Database::ADAPTERS, Sequel::Database::AUTOINCREMENT, Sequel::Database::CASCADE, Sequel::Database::COLUMN_DEFINITION_ORDER, Sequel::Database::COMMA_SEPARATOR, Sequel::Database::MSSQL_DEFAULT_RE, Sequel::Database::MYSQL_TIMESTAMP_RE, Sequel::Database::NOT_NULL, Sequel::Database::NO_ACTION, Sequel::Database::NULL, Sequel::Database::POSTGRES_DEFAULT_RE, Sequel::Database::PRIMARY_KEY, Sequel::Database::RESTRICT, Sequel::Database::SET_DEFAULT, Sequel::Database::SET_NULL, Sequel::Database::SQL_BEGIN, Sequel::Database::SQL_COMMIT, Sequel::Database::SQL_RELEASE_SAVEPOINT, Sequel::Database::SQL_ROLLBACK, Sequel::Database::SQL_ROLLBACK_TO_SAVEPOINT, Sequel::Database::SQL_SAVEPOINT, Sequel::Database::STRING_DEFAULT_RE, Sequel::Database::TEMPORARY, Sequel::Database::TRANSACTION_BEGIN, Sequel::Database::TRANSACTION_COMMIT, Sequel::Database::TRANSACTION_ISOLATION_LEVELS, Sequel::Database::TRANSACTION_ROLLBACK, Sequel::Database::UNDERSCORE, Sequel::Database::UNIQUE, Sequel::Database::UNSIGNED

Instance Attribute Summary

Attributes inherited from Sequel::Database

#default_schema, #log_warn_duration, #loggers, #opts, #pool, #prepared_statements, #sql_log_level, #transaction_isolation_level

Instance Method Summary collapse

Methods inherited from Sequel::Database

#<<, #[], adapter_class, adapter_scheme, #adapter_scheme, #add_column, #add_index, #add_servers, #alter_table, #call, #cast_type_literal, connect, #create_or_replace_view, #create_table, #create_table!, #create_table?, #create_view, #database_type, #disconnect, #drop_column, #drop_index, #drop_table, #drop_view, #dump_indexes_migration, #dump_schema_migration, #dump_table_schema, #each_server, #execute_ddl, #fetch, #from, #get, #identifier_input_method, identifier_input_method, #identifier_input_method=, identifier_input_method=, identifier_output_method, #identifier_output_method, #identifier_output_method=, identifier_output_method=, #indexes, #inspect, #literal, #log_info, #log_yield, #logger=, #query, #quote_identifiers=, quote_identifiers=, #quote_identifiers?, #remove_servers, #rename_column, #rename_table, #run, #schema, #select, #serial_primary_key_options, #servers, #set_column_default, #set_column_type, single_threaded=, #single_threaded?, #supports_create_table_if_not_exists?, #supports_prepared_transactions?, #supports_savepoints?, #supports_transaction_isolation_levels?, #synchronize, #table_exists?, #tables, #test_connection, #transaction, #typecast_value, #url, #views

Methods included from Metaprogramming

#meta_def

Constructor Details

#initialize(opts) ⇒ Database

Call the DATABASE_SETUP proc directly after initialization, so the object always uses sub adapter specific code. Also, raise an error immediately if the connection doesn’t have a uri, since DataObjects requires one.

Raises:



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# File 'lib/sequel/adapters/do.rb', line 47

def initialize(opts)
  super
  raise(Error, "No connection string specified") unless uri
  if prok = DATABASE_SETUP[subadapter.to_sym]
    prok.call(self)
  end
end

Instance Method Details

#connect(server) ⇒ Object

Setup a DataObjects::Connection to the database.



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# File 'lib/sequel/adapters/do.rb', line 56

def connect(server)
  setup_connection(::DataObjects::Connection.new(uri(server_opts(server))))
end

#dataset(opts = nil) ⇒ Object

Return a Sequel::DataObjects::Dataset object for this database.



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# File 'lib/sequel/adapters/do.rb', line 61

def dataset(opts = nil)
  DataObjects::Dataset.new(self, opts)
end

#execute(sql, opts = {}) ⇒ Object

Execute the given SQL. If a block is given, the DataObjects::Reader created is yielded to it. A block should not be provided unless a a SELECT statement is being used (or something else that returns rows). Otherwise, the return value is the insert id if opts is :insert, or the number of affected rows, otherwise.



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# File 'lib/sequel/adapters/do.rb', line 70

def execute(sql, opts={})
  synchronize(opts[:server]) do |conn|
    begin
      command = conn.create_command(sql)
      res = log_yield(sql){block_given? ? command.execute_reader : command.execute_non_query}
    rescue ::DataObjects::Error => e
      raise_error(e)
    end
    if block_given?
      begin
        yield(res)
      ensure
       res.close if res
      end
    elsif opts[:type] == :insert
      res.insert_id
    else
      res.affected_rows
    end
  end
end

#execute_dui(sql, opts = {}) ⇒ Object

Execute the SQL on the this database, returning the number of affected rows.



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# File 'lib/sequel/adapters/do.rb', line 94

def execute_dui(sql, opts={})
  execute(sql, opts)
end

#execute_insert(sql, opts = {}) ⇒ Object

Execute the SQL on this database, returning the primary key of the table being inserted to.



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# File 'lib/sequel/adapters/do.rb', line 100

def execute_insert(sql, opts={})
  execute(sql, opts.merge(:type=>:insert))
end

#subadapter ⇒ Object

Return the subadapter type for this database, i.e. sqlite3 for do:sqlite3::memory:.



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# File 'lib/sequel/adapters/do.rb', line 106

def subadapter
  uri.split(":").first
end

#uri(opts = {}) ⇒ Object

Return the DataObjects URI for the Sequel URI, removing the do: prefix.



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# File 'lib/sequel/adapters/do.rb', line 112

def uri(opts={})
  opts = @opts.merge(opts)
  (opts[:uri] || opts[:url]).sub(/\Ado:/, '')
end