grouped_collection_select返回错误

Question

我有一个“grouped_collection_select”为“分支”字段，结合“扇区”字段。部门的has_many分公司和分支机构belongs_to的部门：

<%= f.grouped_collection_select(:branch, current_user.company.sectors.order(:sector), :branches, :sector, :id, :branch, include_blank: true) %> 

这工作，但“：分支”显示所有分支机构，应只显示current_user.company的分支，就像sectord。但是，当我改变“：分支”到“current_user.company.branches.order（：分支）”，我得到一个错误：

(eval):1: syntax error, unexpected $end group.#<ActiveRecord 

什么我错在这里做什么？谢谢！

Answer 1

为了清晰（和语义）设置集合中的控制器在视图中使用：

@sectors = current_user.company.sectors.order(:sector) 

...或者，如果你想限制都呈现由用户对每个部门的分支，你'd可能希望基于用户的分支来构建集合。举个例子：

@sectors = current_user.company.branches.collect{|b| b.sector}.uniq 

然后假设你要设置的branch_id和扇区都有一个name属性和分支都有一个名字属性，这应该工作：

<%= f.grouped_collection_select(:branch_id, @sectors, :branches, :name, :id, :name, :include_blank=>true) 

#:branch_id is the attribute you will be setting on the form_builder's object. 
#@sectors is the collection of objects for the groups. 
#:branches is the method that will be called on each sector object. 
#:name is the method that will be called on each sector object to label the group. 
#:id is the method that will be called on each branch to set the option's value. 
#:name is the method that will be called on each branch to set the option's label.