我将一些代码从我的RoR应用程序中的用户显示页面移动到根页面,但它不起作用。让我解释一下:
首先是我的控制器: 应用/控制器/ users_controllers.rb
class UsersController < ApplicationController
.
.
.
def show
@user = User.find(params[:id])
@owned_products = @user.owned_products.paginate(page: params[:page])
@borrowed_products = @user.borrowed_products.paginate(page: params[:page])
end
.
.
.
end
app / views / users / show.html.erb 包含驱动到部分的<%= render 'products/table' %>
行:
应用/视图/产品/ _table.html.erb
.
.
.
<% if @user.owned_products.any? %>
<table>
<% @user.owned_products.each do |owned_product| %>
<%= render 'products/products', product: owned_product %>
<% end %>
</table>
<%= will_paginate @owned_products %>
<% end %>
.
.
.
驱动到部分: 应用/视图/产品/ _products.html.erb
<tr>
<td class="name"><%= product.name %></td>
<% if product.owner == @user %>
<td class="availability">
<% if product.borrower == nil %>
<%= t('available_since') %>
<%= time_ago_in_words(product.updated_at) %>
<% else %>
<%= t('borrowed_since') %>
<%= time_ago_in_words(product.updated_at) %>
<%= t('by') %>
<%= link_to product.borrower.name, product.borrower %>
<% end %>
</td>
<% else %>
<td class="availability">
<%= t('borrowed_since') %>
<%= time_ago_in_words(product.updated_at) %>
<%= t('from') %>
<%= link_to product.owner.name, product.owner %>
</td>
<% end %>
</tr>
当我转到用户节目页面时,它工作得很好。
然后我决定将此表移动到根页面,即home / index。
我改编 app / controllers / home_controller.rb :
class HomeController < ApplicationController
def index
if signed_in?
@user = current_user
@product = @user.owned_products.build
@owned_products = @user.owned_products.paginate(page: params[:page])
@borrowed_products = @user.borrowed_products.paginate(page: params[:page])
end
end
end
我在 app / views / home / index.html.erb 中有适当的行:
.
.
.
<% if signed_in? %>
<%= render 'products/table' %>
<% end %>
.
.
.
然而,沮丧!错误来了:
Showing /home/flo/RoR/letroquet/app/views/products/_products.html.erb where line #7 raised:
undefined method `>' for nil:NilClass
提取的来源(第7行):
4 <td class="availability">
5 <% if product.borrower == nil %>
6 <%= t('available_since') %>
7 <%= time_ago_in_words(product.updated_at) %>
8 <% else %>
9 <%= t('borrowed_since') %>
10 <%= time_ago_in_words(product.updated_at) %>
Trace of template inclusion: app/views/products/_table.html.erb, app/views/home/index.html.erb
Rails.root: /home/flo/RoR/letroquet
app/views/products/_products.html.erb:7:in `_app_views_products__products_html_erb__2774185914588219313_69859460726420'
app/views/products/_table.html.erb:10:in `block in _app_views_products__table_html_erb___2883209502501552645_69859460299020'
app/views/products/_table.html.erb:9:in `_app_views_products__table_html_erb___2883209502501552645_69859460299020'
app/views/home/index.html.erb:18:in `_app_views_home_index_html_erb__2755724236080280393_69859462469080'
如果我删除#7行,那就更糟了:
/home/flo/RoR/letroquet/app/views/products/_products.html.erb:9: syntax error, unexpected tIDENTIFIER, expecting ')'
...fer.append= ( t('borrowed_since') );@output_buffer.safe_conc...
... ^
/home/flo/RoR/letroquet/app/views/products/_products.html.erb:11: syntax error, unexpected tIDENTIFIER, expecting ')'
...;@output_buffer.append= ( t('by') );@output_buffer.safe_conc...
... ^
/home/flo/RoR/letroquet/app/views/products/_products.html.erb:21: unknown regexp options - td
unmatched close parenthesis: /td>
'); else
@output_buffer.safe_concat(' <td class="availability">
');@output_buffer.append= ( t('borrowed_since') );@output_buffer.safe_concat('
');@output_buffer.safe_concat(' ');@output_buffer.append= ( time_ago_in_words(product.updated_at) );@output_buffer.safe_concat('
');@output_buffer.safe_concat(' ');@output_buffer.append= ( t('from') );@output_buffer.safe_concat('
');@output_buffer.safe_concat(' ');@output_buffer.append= ( link_to product.owner.name, product.owner );@output_buffer.safe_concat('
');@output_buffer.safe_concat(' </
/home/flo/RoR/letroquet/app/views/products/_products.html.erb:23: unterminated regexp meets end of file
/home/flo/RoR/letroquet/app/views/products/_products.html.erb:23: syntax error, unexpected end-of-input, expecting ')'
提取的来源(第9行):
6 <%= t('available_since') %>
7 <%= # time_ago_in_words(product.updated_at) %>
8 <% else %>
9 <%= t('borrowed_since') %>
10 <%= time_ago_in_words(product.updated_at) %>
11 <%= t('by') %>
12 <%= link_to product.borrower.name, product.borrower %>
Trace of template inclusion: app/views/products/_products.html.erb, app/views/products/_table.html.erb, app/views/home/index.html.erb
Rails.root: /home/flo/RoR/letroquet
app/views/products/_table.html.erb:10:in `block in _app_views_products__table_html_erb___2883209502501552645_69859460299020'
app/views/products/_table.html.erb:9:in `_app_views_products__table_html_erb___2883209502501552645_69859460299020'
app/views/home/index.html.erb:18:in `_app_views_home_index_html_erb__2755724236080280393_69859462469080'
你知道会发生什么事吗?