Thanks, but didn't work.
irb(main):064:0> urls = Url.all(:category_id => catID)
ArgumentError: Unknown property 'category_id'
from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/query.rb:
462:in `append_condition'
from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/query.rb:
246:in `initialize'
from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/query.rb:
245:in `each'
from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/query.rb:
245:in `initialize'
from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/model.rb:
431:in `new'
from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/model.rb:
431:in `scoped_query'
from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/model.rb:
256:in `all'
from (irb):64
irb(main):065:0> urls = Url.all(:category_id => 1)
ArgumentError: Unknown property 'category_id'
On Apr 20, 11:01 pm, Chris Van Pelt <[email protected]> wrote:
> urls = Url.all(:category => catID)
>
> Should be:
>
> urls = Url.all(:category_id => catID)
>
> On Mon, Apr 20, 2009 at 10:44 PM, Dan D <[email protected]> wrote:
>
> > Please help, I'm sure I'm over looking something silly, but I cannot
> > query by category. Everything works great except the last line returns
> > " Unknown property 'category'" error. Same if I use the (:conditions
> > => ...... ) syntax.
>
> > Thanks,
> > Dan
>
> > require 'rubygems'
> > require 'dm-core'
>
> > DataMapper.setup(:default, "sqlite3://#{Dir.pwd}/test.sqlite3")
>
> > DataMapper::Logger.new(STDOUT, :debug)
> > # :off, :fatal, :error, :warn, :info, :debug
> > DataObjects::Sqlite3.logger = DataObjects::Logger.new(STDOUT, 0)
>
> > class Url
> > include DataMapper::Resource
>
> > property :id, Integer, :serial => true
> > property :url, Text, :nullable => false
>
> > has n, :categorizations
> > has n, :categories,
> > :through => :categorizations,
> > :class_name => 'Category',
> > :mutable => true
> > end
>
> > class Category
> > include DataMapper::Resource
> > property :id, Serial
> > property :name, String
>
> > has n, :categorizations
> > has n, :urls, :through => :categorizations, :mutable => true
> > end
>
> > class Categorization
> > include DataMapper::Resource
> > property :id, Serial
>
> > belongs_to :category
> > belongs_to :url
> > end
>
> > DataMapper.auto_migrate!
>
> > cat1 = Category.new
> > cat1.name = "Cat1"
> > cat1.save
>
> > cat2 = Category.new
> > cat2.name = "Cat2"
> > cat2.save
>
> > Category.all
>
> > url1 = Url.new
> > url1.url = "http://yahoo.com";
> > url1.save
>
> > url2 = Url.new
> > url2.url = "http://google.com";
> > url2.save
>
> > catID = Category.first.id
> > urlID = Url.first.id
>
> > Categorization.create(:category_id => catID, :url_id => urlID)
>
> > urls = Url.all(:category => catID)
> > ArgumentError: Unknown property 'category'
> > from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/query.rb:
> > 462:in `append_condition'
> > from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/query.rb:
> > 246:in `initialize'
> > from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/query.rb:
> > 245:in `each'
> > from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/query.rb:
> > 245:in `initialize'
> > from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/model.rb:
> > 431:in `new'
> > from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/model.rb:
> > 431:in `scoped_query'
> > from /usr/lib/ruby/gems/1.8/gems/dm-core-0.9.11/lib/dm-core/model.rb:
> > 256:in `all'
> > from (irb):66
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