为什么我的application.html.erb中的if语句不能像我所期望的那样工作？

在我application.html.erb，我有以下几点：为什么我的application.html.erb中的if语句不能像我所期望的那样工作？

 <% if (controller_name == "questions" && action_name == "index") || (controller_name == "jobs" && action_name = "index") %> 
     <%= "This is the IF for #{controller_name} and #{controller.action_name}" %> 
      <%= yield %> 
     <% elsif current_page?(controller: "jobs", action: "show") %> 
     <%= "This is the ELSIF for #{controller_name} and #{controller.action_name}" %> 
      <div class="wrapper wrapper-content article"> 
      <%= yield %> 
      </div> 
     <% else %> 
     <%= "This is the ELSE for #{controller_name} and #{controller.action_name}" %> 
     <% end %>

然后我浏览到一个Jobs#Show页面，在这里看到的日志：

Started GET "/jobs/social-media-manager" for 127.0.0.1 at 2016-06-22 01:00:05 -0500 
Processing by JobsController#show as HTML 
    Parameters: {"id"=>"social-media-manager"} 
    Job Load (1.5ms) SELECT "jobs".* FROM "jobs" WHERE "jobs"."slug" = $1 ORDER BY "jobs"."id" ASC LIMIT $2 [["slug", "social-media-manager"], ["LIMIT", 1]] 
    Rendering jobs/show.html.erb within layouts/application 
    User Load (1.6ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 1546], ["LIMIT", 1]] 
    Role Load (1.7ms) SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL))) [["user_id", 1546]] 
    Rendered jobs/show.html.erb within layouts/application (18.8ms) 
/app/views/layouts/application.html.erb:21: warning: found = in conditional, should be == 
    Rendered shared/_navbar.html.erb (2.6ms) 
    Rendered shared/_footer.html.erb (0.8ms) 
Completed 200 OK in 228ms (Views: 218.1ms | ActiveRecord: 4.8ms)

然而，当我去的观点，我认为这：

</nav> 
</div> 

      This is the IF for jobs and show 
       <div class="row"> 
    <div class="col-lg-10 col-lg-offset-1">

所以，即使我的服务器日志告诉我，我发送了一个请求Jobs#Show，I F语句似乎没有正确评估条件，所以我的布局被破坏了。

我本来期望看到：

This is the ELSIF for jobs and show，而不是IF品种。

我在这里错过了什么？

来源

2016-06-22 marcamillion

存在这样。可能是因为日志的警告。 'warning：found = in conditional，should be =='。在你的第一个条件中，你设置了'action_name =“index”'。 – IngoAlbers

@IngoAlbers DUDE !!!我完全错过了。非常感谢。就是这样。你可以添加答案，我会接受它。 – marcamillion

这是因为您在第一种情况下不检查action_name，而是对其进行设置。

action_name = "index"

参见服务器日志：

警告：发现在条件=应==

来源

2016-06-22 06:21:56 IngoAlbers

你在第二个状态错过了一个=

<% if (controller_name == "questions" && action_name == "index") || (controller_name == "jobs" && action_name = "index") %>

将其更改为

<% if (controller_name == "questions" && action_name == "index") || (controller_name == "jobs" && action_name == "index") %>

来源

2016-06-22 06:20:51

<% if (controller_name == "questions" && action_name == "index") || (controller_name == "jobs" && action_name = "index") %>

应该

<% if (controller_name == "questions" && action_name == "index") || (controller_name == "jobs" && action_name == "index") %>

注意从分配平等action_name = "index"变化至action_name == "index"

来源

2016-06-22 06:21:22 jamesc

为什么我的application.html.erb中的if语句不能像我所期望的那样工作？

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