區塊軌道3

Question

我的觀點：

<%= 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> 

我想給<% end %>從Current Rating塊到端移動，這樣我可以調用rating_phin變量在我text_field_tag，但是當我移動<% end %>在我看來，Current Rating塊之後的所有內容都未呈現。我究竟做錯了什麼？在我看來，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變量只存在於each循環的範圍內。

如果你需要它之​​後，你將不得不再次循環：

<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> 

我不知道你爲什麼會想到移動<% end %>標籤是做正確的事。

如果你迷失在ERB內部，考慮到HTML可以得到多麼繁瑣和複雜，特別是當有Ruby在其中時，這並不是特別困難，特別是當它有活的Ruby時，你可能想要嘗試HAML。它會將其減少到大約一半的行數，並刪除大量的<% %>並關閉標籤碎片，這些碎片往往使ERB難以閱讀。