Rails datables.rb中的undefined方法

Question

我正在關注DataTables的遠程數據上的Railscast。要使其工作，你創建一個datatable.rb

我試圖定義在3個地方用在datatable.rb

這一個選擇是代碼：

class Workorders3Datatable 

delegate :params, :h, :link_to, :number_to_currency, to: :@view 

def initialize(view) 
    @view = view 
end 

def mygroupsopenwos(user) 
    select("workorders.*").joins("left outer join empgroups ON empgroups.workgroup_id=workorders.workgroup_id").where("empgroups.employee_id = ?", user).where("wostatus_id NOT IN (?)", [231, 230, 9263, 9264, 232]) 
end 

def as_json(options = {}) 
    { 
     sEcho: params[:sEcho].to_i, 
     iTotalRecords: workorders.mygroupsopenwos(current_user).count, 
     iTotalDisplayRecords: workorders.mygroupsopenwos(current_user).total_entries,, 
     aaData: data 
    } 
end 

private 

def data 
    workorders.mygroupsopenwos(current_user).map do |workorder| 
    [ 
... 

但是，我得到以下錯誤：

NoMethodError - undefined method `mygroupsopenwos' for #<ActiveRecord::Relation:0x007f9b046ccb08>: 

如何定義mygroupsopenwos這樣我就可以使用它？我應該把它放在控制器中嗎？

Answer 1

刪除workorders.前workorders.mygroupsopenwos(current_user)

mygroupsopenwos是一個實例方法聲明的幾行了！