DataMapper 메모리 오류 없음 - Sinatra

Question

내가 잘못 가고있는 부분에 대한 아이디어가 있습니까?

오류 :

C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-do-adapter-1.1.0/lib/dm-do-adapter/adapter.rb:291:in `next!': failed to allocate memory (NoMemoryError) 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-do-adapter-1.1.0/lib/dm-do-adapter/adapter.rb:291:in `select_fields' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-do-adapter-1.1.0/lib/dm-do-adapter/adapter.rb:39:in `select' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-do-adapter-1.1.0/lib/dm-do-adapter/adapter.rb:276:in `with_connection' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-do-adapter-1.1.0/lib/dm-do-adapter/adapter.rb:33:in `select' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-migrations-1.1.0/lib/dm-migrations/adapters/dm-mysql-adapter.rb:99:in `show_variable' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-migrations-1.1.0/lib/dm-migrations/adapters/dm-mysql-adapter.rb:89:in `character_set' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-migrations-1.1.0/lib/dm-migrations/adapters/dm-mysql-adapter.rb:54:in `create_table_statement' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-migrations-1.1.0/lib/dm-migrations/adapters/dm-do-adapter.rb:94:in `create_model_storage' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-do-adapter-1.1.0/lib/dm-do-adapter/adapter.rb:276:in `with_connection' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-migrations-1.1.0/lib/dm-migrations/adapters/dm-do-adapter.rb:93:in `create_model_storage' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-migrations-1.1.0/lib/dm-migrations/adapters/dm-do-adapter.rb:57:in `upgrade_model_storage' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-migrations-1.1.0/lib/dm-migrations/auto_migration.rb:71:in `upgrade_model_storage' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-migrations-1.1.0/lib/dm-migrations/auto_migration.rb:143:in `auto_upgrade!' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-migrations-1.1.0/lib/dm-migrations/auto_migration.rb:45:in `send' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-migrations-1.1.0/lib/dm-migrations/auto_migration.rb:45:in `repository_execute' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-core-1.1.0/lib/dm-core/support/descendant_set.rb:66:in `each' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-core-1.1.0/lib/dm-core/support/subject_set.rb:212:in `each' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-core-1.1.0/lib/dm-core/support/ordered_set.rb:321:in `each' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-core-1.1.0/lib/dm-core/support/ordered_set.rb:321:in `each' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-core-1.1.0/lib/dm-core/support/subject_set.rb:212:in `each' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-core-1.1.0/lib/dm-core/support/descendant_set.rb:65:in `each' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-migrations-1.1.0/lib/dm-migrations/auto_migration.rb:44:in `repository_execute' 
    from C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/gems/dm-migrations-1.1.0/lib/dm-migrations/auto_migration.rb:27:in `auto_upgrade!' 
    from list.rb:51 

코드 :

require 'rubygems' 
require 'sinatra' 
require 'omniauth/oauth' 
require 'rest-graph' 
require 'hashie/hash' 
require 'dm-core' 
require 'dm-serializer/to_json' 
require 'dm-migrations' 
require 'dm-timestamps' 
require 'dm-validations' 
require 'dm-mysql-adapter' 

enable :sessions 

APP_ID = "XXXXX" 
APP_SECRET = "XXXX" 

SQLCONN = "mysql://XXXXXXX" 

DataMapper.setup(:default, SQLCONN) 

class Person 
    include DataMapper::Resource 

    property :id, Serial 
    property :FBid, String 
    property :visits, Integer 
    property :first_visit, DateTime 
    property :recent_visit, DateTime 
    property :token, String 

    has n, :links 
end 

class Link 
    include DataMapper::Resource 

    property :id, Serial 
    property :created, DateTime 
    property :deactivated, DateTime 
    property :active, Boolean 

    belongs_to :person 

    def self.currentLinks 
    all(:active == true) 
    end 
end 

DataMapper.auto_upgrade! 

Answer 1

all(:active == true) 

시도 ...

all(:active => true)