ruby-on-rails - 带if语句的Users＃show中的语法错误

Question

因此，我有这个ERB部分，它根据传递的局部参数来呈现不同的部分:

<% unless current_user?(@user) do %>
    <div id="relation">
        <% if current_user.friends?(@user) %>
            <%= render('edit-relation', locals: { action: "rm-friend" })%>
        <% elsif current_user.req_friends?(@user) %>
            Friend Request Pending...
        <% elsif current_user.pend_friends?(@user) %>
            <%= render('edit-relation', locals: { action: "add-friend" })%>
            <%= render('edit-relation', locals: { action: "rej-friend" })%>
        <% else %>
            <%= render('edit-relation', locals: { action: "req-friend" })%>
        <% end %>
    </div>
<% end %>

它引发语法错误:

Showing C:/Users/HP/Ubuntu One/A2 Computing Project/Software Development/Client/app/views/layouts/_relation.html.erb where line #15 raised:

C:/Users/HP/Ubuntu One/A2 Computing Project/Software Development/Client/app/views/layouts/_relation.html.erb:15: syntax error, unexpected keyword_ensure, expecting keyword_end
C:/Users/HP/Ubuntu One/A2 Computing Project/Software Development/Client/app/views/layouts/_relation.html.erb:17: syntax error, unexpected end-of-input, expecting keyword_end

没有15或17行。有人看到出什么问题了吗？

Answer 1

else if current_user

您无法在 ruby 中做到这一点。为此有一个特殊的关键字 elsif。

if a
  # ...
elsif b
  # ...
elsif c
  # ...
else
  # ...
end

也

<% unless current_user?(@user) do %>

在此处删除 do。