如何從Rails中的模型路由和渲染（調度）3

我想從模型中派發（路由和渲染）。（我只在乎GET請求，我不理Accept:頭，所以我只能看着PATH_INFO。）如何從Rails中的模型路由和渲染（調度）3

# app/models/response.rb 
class Response < ActiveRecord::Base 
    # col :path_info 
    # col :app_version 
    # col :body, :type => :text 

    def set_body 
    params = Rails.application.routes.recognize_path(path_info, :method => :get) 
    controller = "#{params[:controller].camelcase}Controller".constantize.new 
    controller.action_name = params[:action] 
    controller.request = ActionDispatch::Request.new('rack.input' => []) 
    controller.request.path_parameters = params.with_indifferent_access 
    controller.request.format = params[:format] || 'html' 
    controller.response = ActionDispatch::Response.new 
    controller.send params[:action] 
    self.body = controller.response.body 
    end 
end

上面的代碼工作，但感覺笨重。什麼是正確的做法？我想象Yehuda Katz會告訴我是這樣的：

def set_body 
    # [...] 
    app = "#{params[:controller].camelcase}Controller".constantize.action(params[:action]) 
    app.process params 
    self.body = app.response.body 
end

FWIW這裏是我的路線文件：

# config/routes.rb 
MyApp::Application.routes.draw do 
    resources :products          # GET /products.json?merchant_id=foobar 
    match '/:id(.:format)' => 'contents#show', :via => 'get' # GET /examples 
    root :to => 'contents#index', :via => 'get'    # GET/
end

參見：Rails 3 request dispatch cycle

來源

2011-10-14 Seamus Abshere

它實際上比這更簡單：

session = ActionDispatch::Integration::Session.new(Rails.application) 
session.get(path_info) 
self.body = session.response.body

來源

2011-10-15 20:51:27

如何從Rails中的模型路由和渲染（調度）3

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