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POHaving trouble understanding some code (Ruby on Rails)
 

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  1. POHaving trouble understanding some code (Ruby on Rails)
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    <p>I posted a <a href="https://stackoverflow.com/questions/2739270/how-do-i-prevent-a-form-from-being-resubmitted-too-quickly-in-a-rails-application">question</a> awhile ago asking how I could limit the rate at which a form could be submitted from a rails application. I was helped by a very patient user and their solution works great. The code was for my comments controller, and now I find myself wanting to add this functionality to another controller, my Messages controller. I immediately tried reusing the working code from the comments controller but I couldn't get it to work. Instead of asking for the working code, could someone please help me understand my working comment controller code?</p> <pre><code>class CommentsController &lt; ApplicationController #... before_filter :post_check def record_post_time cookies[:last_post_at] = Time.now.to_i end def last_post_time Time.at((cookies[:last_post_at].to_i rescue 0)) end MIN_POST_TIME = 2.minutes def post_check return true if (Time.now - last_post_time) &gt; MIN_POST_TIME flash[:warning] = "You are trying to reply too fast." @message = Message.find(params[:message_id]) redirect_to(@message) return false end #... def create @message = Message.find(params[:message_id]) @comment = @message.comments.build(params[:comment]) if @comment.save record_post_time flash[:notice] = "Replied to \"#{@message.title}\"" redirect_to(@message) else render :action =&gt; "new" end end def update @message = Message.find(params[:message_id]) @comment = Comment.find(params[:id]) if @comment.update_attributes(params[:comment]) record_post_time redirect_to post_comment_url(@message, @comment) else render :action =&gt; "edit" end end #... end </code></pre> <p>My Messages controller is pretty much a standard rails generated controller with a few before filters and associated private methods for DRYing up the code and a redirect for non existent pages. </p> <p>I'll explain how much of the code I understand. When a comment is created, a cookie is created with a last_post_time value. If they try to post another comment, the cookie is checked if the last one was made in the last two minutes. If it was a flash warning is displayed and no comment is recorded. What I don't really understand is how the post_check method works and how I can adapt it for my simpler posts controller. I thought I could reuse all the code in the message controller with the exception of the line:</p> <pre><code>@message = Message.find(params[:message_id]) # (don't need the redirect code) </code></pre> <p>in the post_check method. I really want to understand this. Can someone explain why this doesn't work? I greatly appreciate you reading my lengthy question. </p> <p>Create and update actions of the Messages controller:</p> <pre><code>def create @message = Message.new(params[:message]) respond_to do |format| if @message.save record_post_time flash[:notice] = "Created \"#{@message.title}\"" format.html { redirect_to(messages_url) } else format.html { render :action =&gt; "new" } end end end def update respond_to do |format| if @post.update_attributes(params[:post]) record_post_time flash[:notice] = 'Post was successfully updated.' format.html { redirect_to(@post) } else format.html { render :action =&gt; "edit" } end end end </code></pre>
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    1. COWhat does 'it trips up on the "record_post_time" in the create action/method' mean?
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    2. COI get a "undefined local variable or method `record_post_time'" error. sorry for not being more clear. I'll edit my question.
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      1. POHaving trouble understanding some code (Ruby on Rails)
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    3. COOops, I had a typo in my code. There's no record_post_time error anymore. I just don't know what to replace "@message = Message.find(params[:message_id]) " with, and want to understand the code. Sorry about that confusion. I edited my question accordingly. Now I just get the error: "Couldn't find Message without an ID" when trying to make a post. It says the problem is in the post_check method.
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