collection_select方法在Rails 3.1.1中给出错误 [英] collection_select method gives error in Rails 3.1.1

问题描述

我有一个名为Category的模型和其他模型产品.他们具有has_many和belongs_to关系. 但是我认为代码

I have a Model called Category and other Model Product. They have has_many and belongs_to relation. But code in my view

    <p><%= f.collection_select(:product, :category_id, Category.all, :id, :name)%>

在给我

 undefined method `merge' for :name:Symbol

有什么线索吗?

推荐答案

您可能有类似这样的事情:

Chances are you have something like this:

<%= form_for @product do |f| %>

由于f已经与product绑定，因此您不需要将其作为第一个参数，因此应该为:

Because f is already tied to product, you don't need to include it as your first argument, so it should just be:

<%= f.collection_select :category_id, Category.all, :id, :name %>

或者，您不能使用f.:

<%= collection_select :product, :category_id, Category.all, :id, :name %>

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