区块轨道3

Question

我的观点：

<%= form_tag(rate_url) do %> 
    <%= hidden_field_tag :prod_id, params[:product_id] %> 
    <%= hidden_field_tag :rating_set_id, params[:rating_set_id] %> 
    <span class = "heading"> Recommendations </span> 
    <div><%= submit_tag 'Submit Ratings', :class => " btn right" %></div> 
    <span id = "rate_more_link"> 
    <%= link_to "Rate More Products", products_path(:rating_set_id => params[:rating_set_id])%> 
    </span> 
    <br/> 
    <div id ="prods_container"> 
    <% @recommendations.each do |rec| %> 
    <% url_raw = URI.parse("url_to_parse") %> 
    <% url = Net::HTTP.get_response(url_raw).body %> 
    <% if url.empty? %> 
     <% @title   = "Product Unavailable via API" %> 
     <% @url   = "#{rec.wmt_id}" %> 
     <% @cover_img  = "_180X180.jpg" %> 
     <% @price   = "Product Unavailable via API" %> 
    <% else %> 
     <% begin %> 
     <% @response1 = JSON.parse(url) %> 
     <% @title   = @response1["ProductName"]%> 
     <% @url   = "{@response1["ProductUrl"]}"%> 
     <% @cover_img  = @response1["ImagePath"]%> 
     <% @price   = @response1["currentItemPrice"]%> 
     <% rescue %> 
     <% end %> 
    <% end %> 
    <div id ="prod"> 
     <span class = "radio_button"> 
     <%= hidden_field_tag "recommendation_ratings[#{rec.id}][recommendation_id]", rec.id %> 
     <%= radio_button_tag "recommendation_ratings[#{rec.id}][rating]", '3'%> Good 
     <%= radio_button_tag "recommendation_ratings[#{rec.id}][rating]", '2'%> Fair 
     <%= radio_button_tag "recommendation_ratings[#{rec.id}][rating]", '1'%> Bad 
     <%= radio_button_tag "recommendation_ratings[#{rec.id}][rating]", '0'%> N/A 
     </span> 
    <div> 
     <a href='<%= @url %>' target="_blank"> 
     <img src='<%= @cover_img %>' class='product_image_rec_table'></img> 
     </a> 
    </div> 
    <div class = "rec-desc"> 
     <div class = "small"><b>Wmt ID: </b><%= rec.wmt_id %></div> 
     <div class = "small"><b>Title: </b><%= @title %></div> 
     <div class = "small"><b>Price: </b>$<%= @price %></div> 
     <div class = "em"> 
     <b>Current Rating: </b> 
     <% rec.ratings.each do |rating_phin| %> 
      <%= rating_phin.label %> 
     <% end %></div> 
     <br/> 
     </div> 
     <div id="rec_note_text"> 
     <%= text_field_tag "recommendation_ratings[#{rec.id}][notes]", "#{rec.notes}" ,:id => "rec_note_text", :placeholder => 'Enter Notes..'%> 
     </div> 
    </div> 
    <% end %> 
    <% end %> 
</div> 

我想给<% end %>从Current Rating块到端移动，这样我可以调用rating_phin变量在我text_field_tag，但是当我移动<% end %>在我看来，Current Rating块之后的所有内容都未呈现。我究竟做错了什么？在我看来，我如何在我的text_field_tag中更新rating_phin.notes而不是rec.notes？

Answer 1

那rating_phin变量只存在于each循环的范围内。

如果你需要它之​​后，你将不得不再次循环：

<div id="rec_note_text"> 
    <% rec.ratings.each do |rating_phin| %> 
    <%= text_field_tag "recommendation_ratings[#{rec.id}][notes]", "#{rec.notes}" ,:id => "rec_note_text", :placeholder => 'Enter Notes..'%> 
    <% end %> 
</div> 

我不知道你为什么会想到移动<% end %>标签是做正确的事。

如果你迷失在ERB内部，考虑到HTML可以得到多么繁琐和复杂，特别是当有Ruby在其中时，这并不是特别困难，特别是当它有活的Ruby时，你可能想要尝试HAML。它会将其减少到大约一半的行数，并删除大量的<% %>并关闭标签碎片，这些碎片往往使ERB难以阅读。