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stone

2008-May-16 09:53 UTC

errors about aggregation

Hey there

i dont quite know the change of rails 2.0 , but according to Agile
Development With Rails, aggregation seem not working....i now create a
class like this
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class Temp
  attr_reader :n, :p

  def initialize(n,p)
    @n = n
    @p = p
  end

  def to_s
    [@n,@p].compact.join(",")
  end
end
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
now i create a class using ActiveRecord to save to Database, it looks
like this:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def User<ActiveRecord::Base
  #next line NO.17
  composed_of( :attr, :class_name=>Temp, :mapping=>[[:name , :n],
[:password , :p]])

  temp = Temp.new("abc","abc")
  User.create(:attr=> temp)
end
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
the problem is some ERROR prompt up :
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
d:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/
dependencies.rb:478:in `const_missing'': uninitialized constant
User::Temp (NameError)
	from test.rb:17
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
which indicates the <compose_of>  method to be mistaken , i check the
rails API, but the the LATEST rails API is 2007 Dec on http://www.rubyonrail.com
, is the API Rails 1.X ? Have not updated to rails 2.0 yet?
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Frederick Cheung

2008-May-16 09:57 UTC

head link

Re: errors about aggregation

On 16 May 2008, at 10:53, stone wrote:
>
> Hey there
>
> i dont quite know the change of rails 2.0 , but according to Agile
> Development With Rails, aggregation seem not working....i now create a
> class like this
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> class Temp
>  attr_reader :n, :p
>
>  def initialize(n,p)
>    @n = n
>    @p = p
>  end
>
>  def to_s
>    [@n,@p].compact.join(",")
>  end
> end
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> now i create a class using ActiveRecord to save to Database, it looks
> like this:
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> def User<ActiveRecord::Base
>  #next line NO.17
>  composed_of( :attr, :class_name=>Temp, :mapping=>[[:name , :n],:class_name should be the name, ie :class_name => ''Temp''
Also make sure that your Temp class is in temp.rb> [:password , :p]])
>
>  temp = Temp.new("abc","abc")
>  User.create(:attr=> temp)
> end
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> the problem is some ERROR prompt up :
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> d:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/
> dependencies.rb:478:in `const_missing'': uninitialized constant
> User::Temp (NameError)
> 	from test.rb:17
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> which indicates the <compose_of>  method to be mistaken , i check the
> rails API, but the the LATEST rails API is 2007 Dec on
http://www.rubyonrail.com
> , is the API Rails 1.X ? Have not updated to rails 2.0 yet?
Dec 2007 is when rails 2.0 came out.

Eric Archangel

2008-May-16 10:58 UTC

head link

Re: errors about aggregation

You just need modify this line
:mapping=>[[:name , :n], [:password , :p]]
to
:mapping => [["name" , "n"], ["password" ,
"p"]]


On Fri, May 16, 2008 at 5:53 PM, stone
<ftaft2000-uAjRD0nVeow@public.gmane.org> wrote:
>
> Hey there
>
> i dont quite know the change of rails 2.0 , but according to Agile
> Development With Rails, aggregation seem not working....i now create a
> class like this
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> class Temp
>  attr_reader :n, :p
>
>  def initialize(n,p)
>    @n = n
>    @p = p
>  end
>
>  def to_s
>    [@n,@p].compact.join(",")
>  end
> end
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> now i create a class using ActiveRecord to save to Database, it looks
> like this:
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> def User<ActiveRecord::Base
>  #next line NO.17
>  composed_of( :attr, :class_name=>Temp, :mapping=>[[:name , :n],
> [:password , :p]])
>
>  temp = Temp.new("abc","abc")
>  User.create(:attr=> temp)
> end
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> the problem is some ERROR prompt up :
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> d:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/
> dependencies.rb:478:in `const_missing'': uninitialized constant
> User::Temp (NameError)
>        from test.rb:17
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> which indicates the <compose_of>  method to be mistaken , i check the
> rails API, but the the LATEST rails API is 2007 Dec on
> http://www.rubyonrail.com
> , is the API Rails 1.X ? Have not updated to rails 2.0 yet?
> >
>

-- 
Nibirutech CTO Eric.Archangel
MSN: archangel_hzm-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org
QQ: 996252
GMAIL: eric.archangel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
BLOG: http://blog.sina.com.cn/gameloft

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stone

2008-May-19 05:04 UTC

head link

Re: errors about aggregation

not working my friend , still the same error

On May 16, 6:58 pm, "Eric Archangel"
<eric.archan...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> You just need modify this line
> :mapping=>[[:name , :n], [:password , :p]]
> to
> :mapping => [["name" , "n"], ["password" ,
"p"]]
>
>
>
>
>
> On Fri, May 16, 2008 at 5:53 PM, stone
<ftaft2...-uAjRD0nVeow@public.gmane.org> wrote:
>
> > Hey there
>
> > i dont quite know the change of rails 2.0 , but according to Agile
> > Development With Rails, aggregation seem not working....i now create a
> > class like this
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > class Temp
> >  attr_reader :n, :p
>
> >  def initialize(n,p)
> >    @n = n
> >    @p = p
> >  end
>
> >  def to_s
> >    [@n,@p].compact.join(",")
> >  end
> > end
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > now i create a class using ActiveRecord to save to Database, it looks
> > like this:
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > def User<ActiveRecord::Base
> >  #next line NO.17
> >  composed_of( :attr, :class_name=>Temp, :mapping=>[[:name , :n],
> > [:password , :p]])
>
> >  temp = Temp.new("abc","abc")
> >  User.create(:attr=> temp)
> > end
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > the problem is some ERROR prompt up :
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > d:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/
> > dependencies.rb:478:in `const_missing'': uninitialized
constant
> > User::Temp (NameError)
> >        from test.rb:17
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > which indicates the <compose_of>  method to be mistaken , i
check the
> > rails API, but the the LATEST rails API is 2007 Dec on
> >http://www.rubyonrail.com
> > , is the API Rails 1.X ? Have not updated to rails 2.0 yet?
>
> --
> Nibirutech CTO Eric.Archangel
> MSN: archangel_...-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org
> QQ: 996252
> GMAIL: eric.archan...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
> BLOG:http://blog.sina.com.cn/gameloft- Hide quoted text -
>
> - Show quoted text ---~--~---------~--~----~------------~-------~--~----~
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stone

2008-May-19 05:22 UTC

head link

Re: errors about aggregation

it''s all in test.rb before i write this , as your suggestion, i put
Temp class into temp.rb file,but still not working , still some
error :
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test.rb:2:Warning: require_gem is obsolete.  Use gem instead.
d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/
aggregations.rb:171:in `x='': undefined method `constantize''
for
Temp:Class (NoMethodError)
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2117:in `send''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2117:in `attributes=''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2116:in `each''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2116:in `attributes=''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:1926:in `initialize''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:571:in `new''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:571:in `create''
	from test.rb:19
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
line 19 is <%User.create(:x=>temp)%>


On May 16, 5:57 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On 16 May 2008, at 10:53, stone wrote:
>
>
>
>
>
>
>
> > Hey there
>
> > i dont quite know the change of rails 2.0 , but according to Agile
> > Development With Rails, aggregation seem not working....i now create a
> > class like this
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > class Temp
> >  attr_reader :n, :p
>
> >  def initialize(n,p)
> >    @n = n
> >    @p = p
> >  end
>
> >  def to_s
> >    [@n,@p].compact.join(",")
> >  end
> > end
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > now i create a class using ActiveRecord to save to Database, it looks
> > like this:
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > def User<ActiveRecord::Base
> >  #next line NO.17
> >  composed_of( :attr, :class_name=>Temp, :mapping=>[[:name , :n],
>
> :class_name should be the name, ie :class_name =>
''Temp''
> Also make sure that your Temp class is in temp.rb
>
>
>
>
>
> > [:password , :p]])
>
> >  temp = Temp.new("abc","abc")
> >  User.create(:attr=> temp)
> > end
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > the problem is some ERROR prompt up :
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > d:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/
> > dependencies.rb:478:in `const_missing'': uninitialized
constant
> > User::Temp (NameError)
> >    from test.rb:17
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > which indicates the <compose_of>  method to be mistaken , i
check the
> > rails API, but the the LATEST rails API is 2007 Dec
onhttp://www.rubyonrail.com
> > , is the API Rails 1.X ? Have not updated to rails 2.0 yet?
>
> Dec 2007 is when rails 2.0 came out.
>
>  smime.p7s
> 5KDownload- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text ---~--~---------~--~----~------------~-------~--~----~
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stone

2008-May-19 05:27 UTC

head link

Re: errors about aggregation

it''s all in one test.rb before , now the Temp class has moved to
temp.rb , but still some errors ,why?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test.rb:2:Warning: require_gem is obsolete.  Use gem instead.
d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/
aggregations.rb:171:in `attr='': undefined method `constantize''
for
Temp:Class (NoMethodError)
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2117:in `send''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2117:in `attributes=''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2116:in `each''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2116:in `attributes=''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:1926:in `initialize''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:571:in `new''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:571:in `create''
	from test.rb:19
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
which indicates the line <% User.create(:attr=>temp) %> to be mistaken

On May 16, 5:57 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On 16 May 2008, at 10:53, stone wrote:
>
>
>
>
>
>
>
> > Hey there
>
> > i dont quite know the change of rails 2.0 , but according to Agile
> > Development With Rails, aggregation seem not working....i now create a
> > class like this
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > class Temp
> >  attr_reader :n, :p
>
> >  def initialize(n,p)
> >    @n = n
> >    @p = p
> >  end
>
> >  def to_s
> >    [@n,@p].compact.join(",")
> >  end
> > end
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > now i create a class using ActiveRecord to save to Database, it looks
> > like this:
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > def User<ActiveRecord::Base
> >  #next line NO.17
> >  composed_of( :attr, :class_name=>Temp, :mapping=>[[:name , :n],
>
> :class_name should be the name, ie :class_name =>
''Temp''
> Also make sure that your Temp class is in temp.rb
>
>
>
>
>
> > [:password , :p]])
>
> >  temp = Temp.new("abc","abc")
> >  User.create(:attr=> temp)
> > end
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > the problem is some ERROR prompt up :
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > d:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/
> > dependencies.rb:478:in `const_missing'': uninitialized
constant
> > User::Temp (NameError)
> >    from test.rb:17
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > which indicates the <compose_of>  method to be mistaken , i
check the
> > rails API, but the the LATEST rails API is 2007 Dec
onhttp://www.rubyonrail.com
> > , is the API Rails 1.X ? Have not updated to rails 2.0 yet?
>
> Dec 2007 is when rails 2.0 came out.
>
>  smime.p7s
> 5KDownload- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text ---~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
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stone

2008-May-19 05:35 UTC

head link

Re: errors about aggregation

it''s all in one test.rb before , now the Temp class has moved to
temp.rb , but still some errors ,why?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test.rb:2:Warning: require_gem is obsolete.  Use gem instead.
d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/
aggregations.rb:171:in `attr='': undefined method `constantize''
for
Temp:Class (NoMethodError)
        from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2117:in `send''
        from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2117:in `attributes=''
        from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2116:in `each''
        from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2116:in `attributes=''
        from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:1926:in `initialize''
        from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:571:in `new''
        from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:571:in `create''
        from test.rb:19
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
which indicates the line <% User.create(:attr=>temp) %> to be
mistaken

On May 16, 5:57 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On 16 May 2008, at 10:53, stone wrote:
>
>
>
>
>
>
>
> > Hey there
>
> > i dont quite know the change of rails 2.0 , but according to Agile
> > Development With Rails, aggregation seem not working....i now create a
> > class like this
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > class Temp
> >  attr_reader :n, :p
>
> >  def initialize(n,p)
> >    @n = n
> >    @p = p
> >  end
>
> >  def to_s
> >    [@n,@p].compact.join(",")
> >  end
> > end
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > now i create a class using ActiveRecord to save to Database, it looks
> > like this:
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > def User<ActiveRecord::Base
> >  #next line NO.17
> >  composed_of( :attr, :class_name=>Temp, :mapping=>[[:name , :n],
>
> :class_name should be the name, ie :class_name =>
''Temp''
> Also make sure that your Temp class is in temp.rb
>
>
>
>
>
> > [:password , :p]])
>
> >  temp = Temp.new("abc","abc")
> >  User.create(:attr=> temp)
> > end
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > the problem is some ERROR prompt up :
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > d:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/
> > dependencies.rb:478:in `const_missing'': uninitialized
constant
> > User::Temp (NameError)
> >    from test.rb:17
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > which indicates the <compose_of>  method to be mistaken , i
check the
> > rails API, but the the LATEST rails API is 2007 Dec
onhttp://www.rubyonrail.com
> > , is the API Rails 1.X ? Have not updated to rails 2.0 yet?
>
> Dec 2007 is when rails 2.0 came out.
>
>  smime.p7s
> 5KDownload- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text ---~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
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-~----------~----~----~----~------~----~------~--~---

Ryan Bigg (Radar)

2008-May-19 05:39 UTC

head link

Re: errors about aggregation

Can you show us all of your Temp class please, and the code that you''re
using to get that error, and any other model that defines a relationship
with the Temp class. It looks possible to me that you''re doing
:class_name
=> Temp, when it should be :class_name => "Temp". I think
that''s where I
recall getting an error message like that from.

-- 
Appreciated my help?
Reccommend me on Working With Rails
http://workingwithrails.com/person/11030-ryan-bigg

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stone

2008-May-19 05:50 UTC

head link

Re: errors about aggregation

okay

this is temp.rb
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class Temp
  attr_reader :n, :p
  def initialize(n,p)
    @n = n
    @p = p
  end
  def to_s
    [@n,@p].compact.join(",")
  end
end
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
and this is test.rb
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
require "rubygems"
require_gem "activerecord"
require "pp"
require ''Temp''

ActiveRecord::Base.establish_connection(:adapter=>"mysql",:host=>"localhost",:database=>"test",
:encoding=>"utf8",:username=>"root",:password=>"root")

class User < ActiveRecord::Base
  composed_of :attr, :class_name=>Temp, :mapping=>[[:name , :n],
[:password , :p]]

  temp = Temp.new("abc","abc")
  User.create(:attr => temp)
end
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
they are in the same fold ,my seql database have 3 columns , id , name
and password , id is unique and key , name and password can be null


On May 19, 1:39 pm, "Ryan Bigg (Radar)"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Can you show us all of your Temp class please, and the code that
you''re
> using to get that error, and any other model that defines a relationship
> with the Temp class. It looks possible to me that you''re doing
:class_name
> => Temp, when it should be :class_name => "Temp". I think
that''s where I
> recall getting an error message like that from.
>
> --
> Appreciated my help?
> Reccommend me on Working With
Railshttp://workingwithrails.com/person/11030-ryan-bigg--~--~---------~--~----~------------~-------~--~----~
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Ryan Bigg (Radar)

2008-May-19 05:54 UTC

head link

Re: errors about aggregation

Yup, just as I thought!
> composed_of :attr, :class_name=>Temp, :mapping=>[[:name , :n],
> [:password , :p]]
>
This should be :class_name=>"Temp", and then it may work after
that.

May I ask, what are you trying to achieve with this code? It doesn''t
seem
very Railsy.
-- 
Appreciated my help?
Reccommend me on Working With Rails
http://workingwithrails.com/person/11030-ryan-bigg

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stone

2008-May-19 06:11 UTC

head link

Re: errors about aggregation

oh no , not again , Railsy or not , anyway , i''m still learning
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test.rb:2:Warning: require_gem is obsolete.  Use gem instead.
d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/
base.rb:2177:in `sort'': undefined method `<=>'' for
:name:Symbol
(NoMethodError)
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2177:in `attribute_names''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2458:in `clone_attributes''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2126:in `attributes''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2338:in `attributes_with_quotes''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2262:in `create_without_callbacks''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/callbacks.rb:226:in `create_without_timestamps''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/timestamp.rb:29:in `create''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2238:in `create_or_update_without_callbacks''
	 ... 8 levels...
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/transactions.rb:120:in `rollback_active_record_state!''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/transactions.rb:108:in `save''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:572:in `create''
	from test.rb:19
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
On May 19, 1:54 pm, "Ryan Bigg (Radar)"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Yup, just as I thought!
>
> > composed_of :attr, :class_name=>Temp, :mapping=>[[:name , :n],
> > [:password , :p]]
>
> This should be :class_name=>"Temp", and then it may work after
that.
>
> May I ask, what are you trying to achieve with this code? It
doesn''t seem
> very Railsy.
> --
> Appreciated my help?
> Reccommend me on Working With
Railshttp://workingwithrails.com/person/11030-ryan-bigg--~--~---------~--~----~------------~-------~--~----~
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stone

2008-May-19 06:13 UTC

head link

Re: errors about aggregation

sorry to say , that still not right after changing
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test.rb:2:Warning: require_gem is obsolete.  Use gem instead.
d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/
base.rb:2177:in `sort'': undefined method `<=>'' for
:name:Symbol
(NoMethodError)
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2177:in `attribute_names''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2458:in `clone_attributes''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2126:in `attributes''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2338:in `attributes_with_quotes''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2262:in `create_without_callbacks''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/callbacks.rb:226:in `create_without_timestamps''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/timestamp.rb:29:in `create''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:2238:in `create_or_update_without_callbacks''
	 ... 8 levels...
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/transactions.rb:120:in `rollback_active_record_state!''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/transactions.rb:108:in `save''
	from d:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/
active_record/base.rb:572:in `create''
	from test.rb:19
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
On May 19, 1:54 pm, "Ryan Bigg (Radar)"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Yup, just as I thought!
>
> > composed_of :attr, :class_name=>Temp, :mapping=>[[:name , :n],
> > [:password , :p]]
>
> This should be :class_name=>"Temp", and then it may work after
that.
>
> May I ask, what are you trying to achieve with this code? It
doesn''t seem
> very Railsy.
> --
> Appreciated my help?
> Reccommend me on Working With
Railshttp://workingwithrails.com/person/11030-ryan-bigg--~--~---------~--~----~------------~-------~--~----~
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Ryan Bigg (Radar)

2008-May-19 06:20 UTC

head link

Re: errors about aggregation

Where are you calling sort? It''s pointing to line 19 in your test.rb,
which
looks to me to be the call to create.

Ok, do you want to make this more railsy? Your models don''t appear to
be in
a rails directory at all, and the way you are establishing the connection
and defining the model in the same file is not very neat. I suggest reading
through a Rails tutorial, I''ve begun to write a large one myself and
that
should kick start you on the path to enlightenment:
http://frozenplague.net/forum-guide-getting-started/ Just click through the
pages in the right menu, they are in the proper order, ignoring the
Frequently Asked Questions and Lovely People pages.

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stone

2008-May-19 06:29 UTC

head link

Re: errors about aggregation

in fact I just create a ruby project , include all the lib files ,
assuming same as a rails project and start my code.

On May 19, 2:20 pm, "Ryan Bigg (Radar)"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Where are you calling sort? It''s pointing to line 19 in your
test.rb, which
> looks to me to be the call to create.
>
> Ok, do you want to make this more railsy? Your models don''t appear
to be in
> a rails directory at all, and the way you are establishing the connection
> and defining the model in the same file is not very neat. I suggest reading
> through a Rails tutorial, I''ve begun to write a large one myself
and that
> should kick start you on the path to
enlightenment:http://frozenplague.net/forum-guide-getting-started/Just click
through the
> pages in the right menu, they are in the proper order, ignoring the
> Frequently Asked Questions and Lovely People pages.--~--~---------~--~----~------------~-------~--~----~
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stone

2008-May-19 06:38 UTC

head link

Re: errors about aggregation

finally, as Erik the Archangel said , i also change the mapping part ,
i works now , thank you very much for your help

On May 19, 2:29 pm, stone <ftaft2...-uAjRD0nVeow@public.gmane.org>
wrote:> in fact I just create a ruby project , include all the lib files ,
> assuming same as a rails project and start my code.
>
> On May 19, 2:20 pm, "Ryan Bigg (Radar)"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> wrote:
>
>
>
> > Where are you calling sort? It''s pointing to line 19 in your
test.rb, which
> > looks to me to be the call to create.
>
> > Ok, do you want to make this more railsy? Your models don''t
appear to be in
> > a rails directory at all, and the way you are establishing the
connection
> > and defining the model in the same file is not very neat. I suggest
reading
> > through a Rails tutorial, I''ve begun to write a large one
myself and that
> > should kick start you on the path to
enlightenment:http://frozenplague.net/forum-guide-getting-started/Justclick
through the
> > pages in the right menu, they are in the proper order, ignoring the
> > Frequently Asked Questions and Lovely People pages.- Hide quoted text
-
>
> - Show quoted text ---~--~---------~--~----~------------~-------~--~----~
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Ryan Bigg (Radar)

2008-May-19 06:57 UTC

head link

Re: errors about aggregation

No that''s not how you create a Rails app. You have to firstly generate
the
skeleton for the rails app. Read through the tutorial, it should teach you a
few things.

On Mon, May 19, 2008 at 3:59 PM, stone
<ftaft2000-uAjRD0nVeow@public.gmane.org> wrote:
>
> in fact I just create a ruby project , include all the lib files ,
> assuming same as a rails project and start my code.
>
> On May 19, 2:20 pm, "Ryan Bigg (Radar)"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> wrote:
> > Where are you calling sort? It''s pointing to line 19 in your
test.rb,
> which
> > looks to me to be the call to create.
> >
> > Ok, do you want to make this more railsy? Your models don''t
appear to be
> in
> > a rails directory at all, and the way you are establishing the
connection
> > and defining the model in the same file is not very neat. I suggest
> reading
> > through a Rails tutorial, I''ve begun to write a large one
myself and that
> > should kick start you on the path to enlightenment:
> http://frozenplague.net/forum-guide-getting-started/Just click through the
> > pages in the right menu, they are in the proper order, ignoring the
> > Frequently Asked Questions and Lovely People pages.
> >
>

-- 
Appreciated my help?
Reccommend me on Working With Rails
http://workingwithrails.com/person/11030-ryan-bigg

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Rails - May 2008 - errors about aggregation

errors about aggregation

Re: errors about aggregation

Re: errors about aggregation

Re: errors about aggregation

Re: errors about aggregation

Re: errors about aggregation

Re: errors about aggregation

Re: errors about aggregation

Re: errors about aggregation

Re: errors about aggregation

Re: errors about aggregation

Re: errors about aggregation

Re: errors about aggregation

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Re: errors about aggregation