ruby-on-rails - 无法在控制器中调用模型方法 - Thinbug

我对ruby-on-rails非常新，希望你能帮助我。我正在尝试使用ruby-on-rails为Redmine编写一个插件。而且我在控制器中从我的模型中调用一个新方法时遇到了一些问题。所以我制作了Redmine插件教程并在之后有了这些项目：

型号：

class Poll < ActiveRecord::Base
  def vote(answer)
     increment(answer == 'yes' ? :yes : :no)
  end
end

控制器：

class PollsController < ApplicationController
  def index
     @project = Project.find(params[:project_id])
     @polls = Poll.all
  end

  def vote
    poll = Poll.find(params[:id])
    poll.vote(params[:answer])
    if poll.save
      flash[:notice] = 'Vote saved.'
    end
    redirect_to :action => 'index'
  end
end

的index.html：

<h2>Polls</h2>

<% @polls.each do |poll| %>
  <p>
  <%= poll.question %>?
  <%= link_to 'Yes', { :action => 'vote', :id => poll[:id], :answer => 'yes' }, :method => :post %> (<%= poll.yes %>) /
  <%= link_to 'No', { :action => 'vote', :id => poll[:id], :answer => 'no' }, :method => :post %> (<%= poll.no %>)
  </p>
<% end %>

之后我想将Wikicontent添加到同一个html中，以便习惯使用RoR。所以我现在的项目看起来像这样：

型号：

    class Poll < ActiveRecord::Base
  def vote(answer)
     increment(answer == 'yes' ? :yes : :no)
  end
  def self.load_content
      @wiki_content = Poll.find_by_sql ("select wc.text
                                 , wc.comments
                                 , wc.version
                                from wiki_contents wc 
                                where wc.page_id = (select min(id) 
                                      from wiki_pages
                                      where wiki_id = 3")
  end
end

控制器：

class PollsController < ApplicationController
  def index
     @project = Project.find(params[:project_id])
     @polls = Poll.all
     @wiki_content = Poll.load_content
  end

  def vote
    poll = Poll.find(params[:id])
    poll.vote(params[:answer])
    if poll.save
      flash[:notice] = 'Vote saved.'
    end
    redirect_to :action => 'index'
  end
end

的index.html：

<h2>Polls</h2>

<% @polls.each do |poll| %>
  <p>
  <%= poll.question %>?
  <%= link_to 'Yes', { :action => 'vote', :id => poll[:id], :answer => 'yes' }, :method => :post %> (<%= poll.yes %>) /
  <%= link_to 'No', { :action => 'vote', :id => poll[:id], :answer => 'no' }, :method => :post %> (<%= poll.no %>)
  </p>
<% end %>

<% @content.each do |cn| %>
    <p>
        <%= cn.text %>
    </p>
<% end %>

根据我的浏览器，我得到了“内部错误”。我试图找到错误，似乎我无法从控制器内部的模型中调用新方法，我无法弄清楚原因。就像我说的那样，我对RoR很新，所以我希望你能帮助我。

这是日志文件中的错误描述：

ActiveRecord::StatementInvalid (Mysql2::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 7: select wc.text
                                 , wc.comments
                                 , wc.version
                                from wiki_contents wc 
                                where wc.page_id = (select min(id) 
                                      from wiki_pages
                                      where wiki_id = 3):

最诚挚的问候附庸风雅

无法在控制器中调用模型方法

2 个答案: