grouped_collection_select返回錯誤

Question

我有一個「grouped_collection_select」爲「分支」字段，結合「扇區」字段。部門的has_many分公司和分支機構belongs_to的部門：

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

這工作，但「：分支」顯示所有分支機構，應只顯示current_user.company的分支，就像sectord。但是，當我改變「：分支」到「current_user.company.branches.order（：分支）」，我得到一個錯誤：

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

什麼我錯在這裏做什麼？謝謝！

Answer 1

爲了清晰（和語義）設置集合中的控制器在視圖中使用：

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

...或者，如果你想限制都呈現由用戶對每個部門的分支，你'd可能希望基於用戶的分支來構建集合。舉個例子：

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

然後假設你要設置的branch_id和扇區都有一個name屬性和分支都有一個名字屬性，這應該工作：

<%= 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.