Postgresql Heroku PGError：operator does not exist： character varying = integer

修正错误有点困难.

所有这些都可以在本地机器上运行.

以下是日志(log):

  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m ActionView::Template::Error (PGEr
  ror: ERROR:  operator does not exist: character varying = integer
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m LINE 1: ...T "reviews".* FROM "re
  views"  WHERE "reviews"."trip_id" = 32
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m : SELECT "reviews".* FROM "review
  s"  WHERE "reviews"."trip_id" = 32):
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m     31:   <div style='display:non
  e'>
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m     33:      <% for review in @tr
  ip.reviews %>
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m     34:
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m     32:    <div id="inline">
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m HINT:  No operator matches the gi
  ven name and argument type(s). You might need to add explicit type casts.
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m   app/controllers/trips_controlle
  r.rb:21:in `show'
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m cache: [GET /trips/32] miss
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m     36:     <li> <%= review.conte
  nt %> </li>
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m     35:     <ul>
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m   app/views/trips/show.html.erb:3
  3:in `_app_views_trips_show_html_erb__3301405670044045300_69859019468960'
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m Completed 500 Internal Server Err
  or in 86ms
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m   Parameters: {"id"=>"32"}
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m   Processing by TripsController#s
  how as HTML
  ←[32m2012-01-09T19:52:24+00:00 app[web.1]:←[0m Rendered trips/show.html.erb with
  in layouts/application (81.8ms)

不确定错误发生在哪里，以及如何修复.

comments .rb

 class Review < ActiveRecord::Base
  belongs_to :trip
 end

 class Trip < ActiveRecord::Base
  has_many :reviews, :dependent => :destroy
  attr_accessible, :reviews_attributes

  accepts_nested_attributes_for :reviews, :reject_if => lambda { |a| a[:name].blank? }, :allow_destroy => true
 end 

显示html.rb

 <%= link_to "Read Reviews", '#inline',  :id => 'various1', :class => 'review' %>  

 <div style='display:none'>  
   <div id="inline">
      <% for review in @trip.reviews %>  
       <ul>
         <li> <%= review.content %> </li>
         <li> <i> <%= review.name %> </i> </li>
       </ul>
     <% end %>  
  </div> 
 </div>

让我困惑的是，我还有另外两个几乎相同的模型，但它们工作得很好.

谢谢