class ActionDispatch::Session::ActiveRecordStore

use it as a basis for high-performance database-specific stores.
The example SqlBypass class is a generic SQL session store. You may
destroy
save
attr_accessor :data
attr_reader :session_id
initialize(hash_of_session_id_and_data, options_hash = {})
self.find_by_session_id(session_id)
You must implement these methods:
ActionDispatch::Session::ActiveRecordStore.session_class = MySessionClass
store, by setting
feature-packed Active Record or a bare-metal high-performance SQL
You may provide your own session class implementation, whether a
the sessions table, making periodic session expiration a snap.
for free if you add created_at and updated_at datetime columns to
Since the default class is a simple Active Record, you get timestamps
on ApplicationController is a good place.
set session.model.id = session.session_id by hand! A before filter
having a separate id column if you don’t want it. However, you must
Note that setting the primary key to the session_id frees you from
ActiveRecord::SessionStore::Session.data_column_name = ‘legacy_session_data’
ActiveRecord::SessionStore::Session.primary_key = ‘session_id’
ActiveRecord::SessionStore::Session.table_name = ‘legacy_session_table’
For example, at the end of config/application.rb:
You may configure the table name, primary key, and data column.
ActionController::SessionOverflowError will be raised.
If the data you write is larger than the column’s size limit,
Session data is marshaled to the data column in Base64 format.
The session_id column should always be indexed for speedy lookups.
data (text or longtext; careful if your session data exceeds 65KB).
session_id (string, usually varchar; maximum length is 255), and
id (numeric primary key),
The default assumes a sessions tables with columns:
with text session_id and data attributes is sufficient.
provided, but any object duck-typing to an Active Record Session class
A session store backed by an Active Record class. A default class is
= Active Record Session Store

def delete_session(request, session_id, options) 

def delete_session(request, session_id, options)
  logger.silence_logger do
    if sid = current_session_id(request)
      if model = get_session_model(request, sid)
        data = model.data
        model.destroy
      end
    end
    request.env[SESSION_RECORD_KEY] = nil
    unless options[:drop]
      new_sid = generate_sid
      if options[:renew]
        new_model = @@session_class.new(:session_id => new_sid, :data => data)
        new_model.save
        request.env[SESSION_RECORD_KEY] = new_model
      end
      new_sid
    end
  end
end

def find_session(request, id) 

def find_session(request, id)
  model = get_session_model(request, id)
  [model.session_id, model.data]
end

def get_session(request, sid) 

def get_session(request, sid)
  logger.silence_logger do
    unless sid and session = @@session_class.find_by_session_id(sid)
      # If the sid was nil or if there is no pre-existing session under the sid,
      # force the generation of a new sid and associate a new session associated with the new sid
      sid = generate_sid
      session = @@session_class.new(:session_id => sid, :data => {})
    end
    request.env[SESSION_RECORD_KEY] = session
    [sid, session.data]
  end
end

def get_session_model(request, id) 

def get_session_model(request, id)
  logger.silence_logger do
    model = @@session_class.find_by_session_id(id)
    if !model
      id = generate_sid
      model = @@session_class.new(:session_id => id, :data => {})
      model.save
    end
    if request.env[ENV_SESSION_OPTIONS_KEY][:id].nil?
      request.env[SESSION_RECORD_KEY] = model
    else
      request.env[SESSION_RECORD_KEY] ||= model
    end
    model
  end
end

def logger 

def logger
  ActiveRecord::Base.logger || ActiveRecord::SessionStore::NilLogger
end

def write_session(request, sid, session_data, options) 

def write_session(request, sid, session_data, options)
  logger.silence_logger do
    record = get_session_model(request, sid)
    record.data = session_data
    return false unless record.save
    session_data = record.data
    if session_data && session_data.respond_to?(:each_value)
      session_data.each_value do |obj|
        obj.clear_association_cache if obj.respond_to?(:clear_association_cache)
      end
    end
    sid
  end
end