搜索在不同的班級的所有學生從學校的觀點

Question

我的模型這種結構：

City has_many School has_many Sclasses has_many Users 

我想要做的就是尋找從學校＃在當前學校的所有用戶顯示視圖。在過去，我有這個搜索它們：

@search = @school.users.ransack(params[:q]) 

現在，用戶模型位置已經改變，我不知道該怎麼做正確的。我想下一步：

def show 
    find_city 
    find_school 

    # search variable for all users in this school 

    if (params.has_key?(:q)) 
    # search for all users in this school 
    else 
    # show all classes of this school 
    @sclasses = @school.sclasses.all 
    end 
end 

辦學模式

class School < ActiveRecord::Base 
    belongs_to :city 
    has_many :sclasses 

    validates :name, presence: true 
    validates :icon_url, length: { maximum: 100 } 
end 

的sclass模式

class Sclass < ActiveRecord::Base 
    belongs_to :school 
    has_many :users 

    validates :name, presence: true, numericality: { only_integer: true } 
    validates :icon_url, length: { maximum: 100 } 
end 

的routes.rb

... 

    get "/gradovi" => "welcome#index", as: "cities" 
    get "/gradovi/novi" => "cities#new", as: "new_city" 
    post "/gradovi" => "cities#create" 
    get "/gradovi/:id" => "cities#show", as: "city" 
    get "/gradovi/:id/uredi" => "cities#edit", as: "edit_city" 
    patch "/gradovi/:id" => "cities#update" 

    get "/gradovi/:city_id" => "schools#index", as: "schools" 
    get "/gradovi/:city_id/nova-skola" => "schools#new", as: "new_school" 
    post "/gradovi/:city_id/" => "schools#create" 
    get "/gradovi/:city_id/skola/:id" => "schools#show", as: "school" 
    get "/gradovi/:city_id/skola/:id/uredi" => "schools#edit", as: "edit_school" 
    patch "/gradovi/:city_id/skola/:id" => "schools#update" 

    get "/gradovi/:city_id/skola/:school_id" => "sclasses#index", as: "sclasses" 
    post "/gradovi/:city_id/skola/:school_id" => "sclasses#create" 
    get "/gradovi/:city_id/skola/:school_id/razred/dodaj" => "sclasses#new", as: "new_sclass" 
    get "/gradovi/:city_id/skola/:school_id/razred/:id" => "sclasses#show", as: "sclass" 
    get "/gradovi/:city_id/skola/:school_id/razred/:id/uredi" => "sclasses#edit", as: "edit_sclass" 
    patch "/gradovi/:city_id/skola/:school_id/razred/:id" => "sclasses#update" 

    get "/gradovi/:city_id/skola/:school_id/razred/:sclass_id" => "users#index", as: "users" 
    post "/gradovi/:city_id/skola/:school_id/razred/:sclass_id" => "users#create" 
    get "/gradovi/:city_id/skola/:school_id/razred/:sclass_id/ucenik/:id" => "users#show", as: "user" 
    get "/gradovi/:city_id/skola/:school_id/razred/:sclass_id/ucenik/:id/uredi" => "users#edit", as: "edit_user" 
    patch "/gradovi/:city_id/skola/:school_id/razred/:sclass_id/ucenik/:id" => "users#update" 
    delete "/gradovi/:city_id/skola/:school_id/razred/:sclass_id/ucenik/:id" => "users#destroy" 

    resources :city 

end 

Answer 1

具有@school變量，這裏是你如何能得到與學校相關聯的所有用戶的列表：

User.joins(sclass: :school).where(schools: { id: @school.id }) 

或者，你可以簡單地定義關聯：

class School < ActiveRecord::Base 
    has_many :users, through: :sclasses 
end 

現在，在視圖中：

@school.users