为什么推送到Heroku时我的rails应用程序不会工作：“ActionView :: Template :: Error（未定义的方法`toilet_available'为nil：NilCl

Question

我正在使用Open Street Map API和leaflet-rails gem在Rails 5中构建一个商店定位器应用程序。一切都在开发环境中按预期工作，但当我推到Heroku时，我得到了“我们很抱歉，但出了点问题。”信息。我创建了一个功能，您可以根据是否有厕所对商店进行分类，这种接缝是问题所在。 Heroku日志显示以下内容：

2018-09-12T22:02:39.751563+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123] Completed 500 Internal Server Error in 624ms (ActiveRecord: 119.5ms)
2018-09-12T22:02:39.706503+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123]   Toilet Load (29.5ms)  SELECT "toilets".* FROM "toilets"
2018-09-12T22:02:39.772904+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123]
2018-09-12T22:02:39.773276+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123]     29:                                             <li><%= link_to "Log In", new_user_session_path %> </li>
2018-09-12T22:02:39.772915+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123] ActionView::Template::Error (undefined method `toilet_available' for nil:NilClass):
2018-09-12T22:02:39.773280+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123]     30:                                             <li><%= link_to "Add Spaeti", new_user_registration_path %> </li>
2018-09-12T22:02:39.773283+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123]     31:                                     <% end %>
2018-09-12T22:02:39.773285+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123]     32:                                     <li><%= link_to "Spaetis with toilets", stores_path(toilet: Toilet.all[0].toilet_available) %></li>
2018-09-12T22:02:39.773288+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123]     33:                             </ul>
2018-09-12T22:02:39.773290+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123]     34:                     </div>
2018-09-12T22:02:39.773292+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123]     35:             </nav>
2018-09-12T22:02:39.773336+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123]
2018-09-12T22:02:39.773423+00:00 app[web.1]: [30a84d17-6a5a-4b3d-b21f-ee08babfd123] app/views/layouts/application.html.erb:32:in `_app_views_layouts_application_html_erb__2166090761148733231_41993540'

当我从视图中删除此行时，应用程序加载正常：<li><%= link_to "Spaetis with toilets", stores_path(toilet: Toilet.all[0].toilet_available) %></li>

可能导致此错误的原因是什么？我已经把头发撕了好几天了......

商店型号：

class Store < ApplicationRecord
    belongs_to :user
    belongs_to :toilet

    validates :name, presence: true
    validates :address, presence: true
    validates :address_line2, presence: true
    validates :address_line3, presence: true
    validates :toilet, presence: true
    # validates :latitude, presence: true
    # validates :longitude, presence: true
    validates :beer_cost, format: { with: /Ad+(?:.d{0,2})?z/ }, numericality: { greater_than: 0, less_than: 10 }
    validates :latitude, :presence => {message: "Not a valid location, please check name address & country fields" }

    def full_address
      [address, address_line2, address_line3].compact.join(', ')
    end
    geocoded_by :full_address
    before_validation :geocode,
      :if => lambda{ |obj| obj.address_changed? }

    def capitalize_name
        name.capitalize
    end

    def capitalize_address
        address.capitalize
    end
end

卫生间型号：

class Toilet < ApplicationRecord
    has_many :stores
end

Schema.rb：

ActiveRecord::Schema.define(version: 20180814220216) do

  create_table "stores", force: :cascade do |t|
    t.string "name"
    t.string "address"
    t.float "beer_cost"
    t.text "facilities"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.float "latitude"
    t.float "longitude"
    t.boolean "toilet"
    t.string "address_line2"
    t.integer "user_id"
    t.integer "toilet_id"
    t.string "address_line3"
  end

  create_table "toilets", force: :cascade do |t|
    t.string "toilet_available"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  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.index ["email"], name: "index_users_on_email", unique: true
    t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
  end

end

Github回购：https://github.com/catsinspacesuits/Spaeti-App