# File lib/mongo_mapper/connection.rb, line 68
    def connect(environment, options={})
      raise 'Set config before connecting. MongoMapper.config = {...}' if config.blank?
      env = config_for_environment(environment)

      if env['options'].is_a?(Hash)
        options = env['options'].symbolize_keys.merge(options)
      end
      options[:read] = options[:read].to_sym if options[:read].is_a? String

      if env.key?('ssl')
        options[:ssl] = env['ssl']
      end

      MongoMapper.connection = if env.key?('hosts')
        klass = (env.key?("mongos") || env.key?("sharded")) ? Mongo::MongoShardedClient : Mongo::MongoReplicaSetClient
        if env['hosts'].first.is_a?(String)
          klass.new( env['hosts'], options )
        else
          klass.new( *env['hosts'].push(options) )
        end
      else
        Mongo::MongoClient.new(env['host'], env['port'], options)
      end

      MongoMapper.database = env['database']
      MongoMapper.database.authenticate(env['username'], env['password']) if env['username'] && env['password']
    end