渲染部分 :object 与 :locals [英] render partial :object vs :locals

问题描述

<%= render :partial => 'partial/path', :locals => {:xyz => 'abc'} %>

对比

<%= render :partial => 'partial/path', :object => @some_object %>

我认为第一个使名为 xyz 的局部变量在局部变量中可用，第二个使名为 object 的局部变量在局部变量中可用.那么区别是什么呢?(除了locals 允许多个变量)

I think the first one make a local variable named xyz available in the partial and the second one makes a local variable named object available in the partial. So what is the difference? (Besides locals allows more than one variable)

推荐答案

在第二种情况下，使用 :object 将默认定义一个与部分名称相同的变量.如果我的部分模板名为 _user.html.erb，那么模板中将定义一个名为user"的局部变量.

In the second case using :object will define a variable with the same name as the partial by default. If my partial template is named _user.html.erb then there will be a local variable named "user" defined in the template.

您可以使用 :as => "another_name" 指定不同的变量名称.

You can specify a different variable name with :as => "another_name".

这里有记录:http://api.rubyonrails.org/classes/ActionView/PartialRenderer.html，这里:http://apidock.com/rails/ActionView/PartialRenderer

...对于较旧的 Rails(版本 <= v3.09):http://apidock.com/rails/ActionView/Partials

...and for older Rails (version <= v3.09): http://apidock.com/rails/ActionView/Partials

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