我尝试创建一个带有照片字段的refinerycms 引擎，并在渲染带有图像的页面时遇到了这个问题。
我搜索了没有结果的答案。
ArgumentError (Didn't recognise the geometry string ):
dragonfly (0.9.15) lib/dragonfly/image_magick/processor.rb:104:in `thumb'
dragonfly (0.9.15) lib/dragonfly/function_manager.rb:39:in `call'
dragonfly (0.9.15) lib/dragonfly/function_manager.rb:39:in `block (2 levels) in call_last'
dragonfly (0.9.15) lib/dragonfly/function_manager.rb:38:in `catch'
dragonfly (0.9.15) lib/dragonfly/function_manager.rb:38:in `block in call_last'
dragonfly (0.9.15) lib/dragonfly/function_manager.rb:37:in `each'
dragonfly (0.9.15) lib/dragonfly/function_manager.rb:37:in `call_last'
dragonfly (0.9.15) lib/dragonfly/processor.rb:5:in `process'
dragonfly (0.9.15) lib/dragonfly/job.rb:79:in `apply'
dragonfly (0.9.15) lib/dragonfly/job.rb:268:in `block in apply'
dragonfly (0.9.15) lib/dragonfly/job.rb:268:in `each'
dragonfly (0.9.15) lib/dragonfly/job.rb:268:in `apply'
dragonfly (0.9.15) lib/dragonfly/response.rb:25:in `to_response'
dragonfly (0.9.15) lib/dragonfly/server.rb:43:in `block in call'
dragonfly (0.9.15) lib/dragonfly/server.rb:39:in `catch'
dragonfly (0.9.15) lib/dragonfly/server.rb:39:in `call'
journey (1.0.4) lib/journey/router.rb:68:in `block in call'
journey (1.0.4) lib/journey/router.rb:56:in `each'
journey (1.0.4) lib/journey/router.rb:56:in `call'
actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:612:in `call'
railties (3.2.13) lib/rails/engine.rb:479:in `call'
railties (3.2.13) lib/rails/railtie/configurable.rb:30:in `method_missing'
journey (1.0.4) lib/journey/router.rb:68:in `block in call'
journey (1.0.4) lib/journey/router.rb:56:in `each'
journey (1.0.4) lib/journey/router.rb:56:in `call'
actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:612:in `call'
warden (1.2.3) lib/warden/manager.rb:35:in `block in call'
warden (1.2.3) lib/warden/manager.rb:34:in `catch'
warden (1.2.3) lib/warden/manager.rb:34:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
rack (1.4.5) lib/rack/etag.rb:23:in `call'
rack (1.4.5) lib/rack/conditionalget.rb:25:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/flash.rb:242:in `call'
rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context'
rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/cookies.rb:341:in `call'
dragonfly (0.9.15) lib/dragonfly/cookie_monster.rb:9:in `call'
activerecord (3.2.13) lib/active_record/query_cache.rb:64:in `call'
activerecord (3.2.13) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `_run__2453851283421214568__call__3206204981088823143__callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.13) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.13) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/reloader.rb:65:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.13) lib/rails/rack/logger.rb:32:in `call_app'
railties (3.2.13) lib/rails/rack/logger.rb:16:in `block in call'
activesupport (3.2.13) lib/active_support/tagged_logging.rb:22:in `tagged'
railties (3.2.13) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.5) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.5) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.13) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.5) lib/rack/lock.rb:15:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/static.rb:63:in `call'
railties (3.2.13) lib/rails/engine.rb:479:in `call'
railties (3.2.13) lib/rails/application.rb:223:in `call'
rack (1.4.5) lib/rack/content_length.rb:14:in `call'
railties (3.2.13) lib/rails/rack/log_tailer.rb:17:in `call'
rack (1.4.5) lib/rack/handler/webrick.rb:59:in `service'
这是代码，但它是由炼油厂使用以下命令生成的：
rails g refinery:engine car name:string description:string photo:image
这是控制器：
def show
@car = Car.find(params[:id])
present(@page)
end
这是视图：
<% content_for :body_content_title do %>
<%= @car.name %>
<% end %>
<% content_for :body do %>
<section>
<h1>Name</h1>
<p>
<%=raw @car.name %>
</p>
</section>
<section>
<h1>Description</h1>
<p>
<%=raw @car.description %>
</p>
</section>
<section>
<h1>Photo</h1>
<p>
<%= image_fu @car.photo, nil %>
</p>
</section>
<% end %>
<% content_for :side_body do %>
<aside>
<h2><%= t('.other') %></h2>
<ul id="cars">
<% @cars.each do |car| %>
<li>
<%= link_to car.name, refinery.cars_car_path(car) %>
</li>
<% end %>
</ul>
</aside>
<% end %>
<%= render '/refinery/content_page' %>
这是一个模型：
module Refinery
module Cars
class Car < Refinery::Core::BaseModel
self.table_name = 'refinery_cars'
attr_accessible :name, :description, :photo_id, :position
validates :name, :presence => true, :uniqueness => true
belongs_to :photo, :class_name => '::Refinery::Image'
end
end
end
