Rails的用戶列加入

Question

我試圖讓與同一學校（用戶對象的字符串）的用戶的所有活動，但我得到的錯誤是這樣的：

燦」將'Activity'加入到名爲'users'的關聯中;或許你拼錯了 呢？

activity_controller.rb

@school = current_user.school 
@bathroom = Activity.includes(:users).where(name: 'Bathroom').where(:user => { :school => @school}) 

和架構：

create_table "activities", force: :cascade do |t| 
    t.string "name" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    t.integer "student_id" 
    t.string "status" 
    t.integer "user_id" 
    t.index ["student_id"], name: "index_activities_on_student_id" 
    t.index ["user_id"], name: "index_activities_on_user_id" 
    end 

    create_table "users", force: :cascade do |t| 
    t.string "email",     default: "", null: false 
    t.string "encrypted_password",  default: "", null: false 
    t.string "reset_password_token" 
    t.datetime "reset_password_sent_at" 
    t.datetime "remember_created_at" 
    t.integer "sign_in_count",   default: 0, null: false 
    t.datetime "current_sign_in_at" 
    t.datetime "last_sign_in_at" 
    t.string "current_sign_in_ip" 
    t.string "last_sign_in_ip" 
    t.datetime "created_at",       null: false 
    t.datetime "updated_at",       null: false 
    t.string "name" 
    t.string "grade" 
    t.string "school" 
    t.integer "maxout" 
    t.index ["email"], name: "index_users_on_email", unique: true 
    t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true 
    end 

Answer 1

不users但user因爲Activity屬於User

@bathroom = Activity.includes(:user).where(name: 'Bathroom').where(:users => { :school => @school}) 

但User有許多activities所以User.includes(:activities)

當然，你必須提供關聯：

class Activity 
    belongs_to :user 

class User 
    has_many :activities