Rails 3.2 ActiveRecord SQL syntax error
I just wrote controller for ajax call like this:

    def create 
        @like = Like.new(params[:like])
        post = params[:like][:post_id]
        uid = params[:like][:ip_address]
        @extant = Like.find(:last, :conditions => ["post_id ? AND ip_address = ?", post, uid])
        last_like_time = @extant.created_at unless @extant.blank?
        curr_time = Time.now
        
        if ((@extant && curr_time - last_like_time >= 24.hours) || @extant.blank?)
          respond_to do |format|
            if @like.save
              format.js
              format.html { redirect_to :back }
            else
              format.html { redirect_to posts_path }
              format.json { render :json => @like.errors, :status => @unprocessable_entity }
            end
        end
        
        else
          render :js => "alert('You already liked this.');"
        end
        
    end

And this is view erb.

    <%= form_for(@like, :remote => true) do |f| %>
    <%= f.hidden_field "post_id", :value => @post.id %>
    <%= f.hidden_field "ip_address", :value => request.remote_ip %>
    <%= submit_tag "Like" %>
    <% end %>


And it executes SQL command like this:

    SELECT  "likes".* FROM "likes"  WHERE (post_id '1' AND ip_address = '127.0.0.1') ORDER BY "likes"."id" DESC LIMIT 1

It causes SQL syntax error. I think my ruby syntax is wrong, so how can I fix?
Rails 3.2 ActiveRecord SQL syntax error
===

I just wrote controller for ajax call like this:

    def create 
        @like = Like.new(params[:like])
        post = params[:like][:post_id]
        uid = params[:like][:ip_address]
        @extant = Like.find(:last, :conditions => ["post_id ? AND ip_address = ?", post, uid])
        last_like_time = @extant.created_at unless @extant.blank?
        curr_time = Time.now
        
        if ((@extant && curr_time - last_like_time >= 24.hours) || @extant.blank?)
          respond_to do |format|
            if @like.save
              format.js
              format.html { redirect_to :back }
            else
              format.html { redirect_to posts_path }
              format.json { render :json => @like.errors, :status => @unprocessable_entity }
            end
        end
        
        else
          render :js => "alert('You already liked this.');"
        end
        
    end

And this is view erb.

    <%= form_for(@like, :remote => true) do |f| %>
    <%= f.hidden_field "post_id", :value => @post.id %>
    <%= f.hidden_field "ip_address", :value => request.remote_ip %>
    <%= submit_tag "Like" %>
    <% end %>


And it executes SQL command like this:

    SELECT  "likes".* FROM "likes"  WHERE (post_id '1' AND ip_address = '127.0.0.1') ORDER BY "likes"."id" DESC LIMIT 1

It causes SQL syntax error. I think my ruby syntax is wrong, so how can I fix?