将“分页未定义的方法”设置为“总页数”

我这里缺什么?我正在使用haml_scaffold生成器,页面可以与will_paginate一起正常工作。当我开始修补的时候,我最终会出现这个“总页数”错误,我不确定我所做的是什么导致了这个错误。有人有什么见解吗? 我正在使用mistrav-will-paginate 2.3.11。

mike@jauntyjackalope:~/project$ script/console
Loading development environment (Rails 2.3.4)
>> @locations = Location.find_all_by_city("springfield")
=> [#<Location id: 3, address: "123 Main St", city: "springfield", phone: "321-1234", business_id: 2>]
>> @locations.class
=> Array
>> @locations.collect{|loc| loc.business}
=> [#<Business id: 2, name: "A Bar", website: "www.abar.com", business_owner_id: 1, created_at: "2009-08-31 21:13:10", updated_at: "2009-08-31 21:13:10">]
>> @locations.class
=> Array
>> @locations.paginate(:page => 1, :per_page => 2)
=> [#<Location id: 3, address: "123 Main St", city: "springfield", phone: "321-1234", business_id: 2>]
>> helper.will_paginate(@locations)
NoMethodError: undefined method `total_pages' for #<Array:0xb6f83bc4>
 from /var/lib/gems/1.8/gems/mislav-will_paginate-2.3.11/lib/will_paginate/view_helpers.rb:197:in `total_pages_for_collection'
 from /var/lib/gems/1.8/gems/mislav-will_paginate-2.3.11/lib/will_paginate/view_helpers.rb:98:in `will_paginate'
 from (irb):7

>> y @locations
--- 
- !ruby/object:Location 
  attributes: 
    city: springfield
    business_id: "2"
    id: "3"
    phone: 321-1234
    address: 123 Main St
  attributes_cache: {}

  business: !ruby/object:Business 
    attributes: 
      name: A Bar
      updated_at: 2009-08-31 21:13:10
      website: www.abar.com
      id: "2"
      created_at: 2009-08-31 21:13:10
      business_owner_id: "1"
    attributes_cache: {}

=> nil
>>