Administrate: undefined local variable or method `page' for #<#<Class:0x00007f3ff1f4c3a0>:0x00007f3ff21d9618>

[Asandolo]

Hello, when I generate the adminstrate pages I have this error in one of my model (Pro)

the model :

class Pro < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :masqueradable, :database_authenticatable, :registerable, :recoverable, :rememberable, :validatable, :omniauthable

  has_person_name
  has_many :rdvs
  has_many :notification_pros, foreign_key: :recipient_id
  has_many :service_pros
  has_many :periods
  belongs_to :establishment, optional: true

end

The routes:

require 'sidekiq/web'

Rails.application.routes.draw do
  get '/periods/weeks', to: 'periods#week', as: 'new_periods_weeks'
  post '/periods/weeks', to: 'periods#new_week', as: 'create_periods_weeks'
  resources :periods
  scope '/establishments/:establishment' do
    resources :prestations
  end
  resources :establishments
  resources :employees
  namespace :admin do
      resources :pros
      resources :users
      resources :announcement_pros
      resources :notification_pros
      resources :service_pros
      resources :periods
      resources :establishments
      resources :prestations
      resources :rdvs

      root to: "pros#index"
    end
  get '/privacy', to: 'home#privacy'
  get '/terms', to: 'home#terms'
    authenticate :pro, lambda { |u| u.admin? } do
      mount Sidekiq::Web => '/sidekiq'
    end


  resources :notification_pros, only: [:index]
  resources :announcement_pros, only: [:index]
  devise_for :pros, controllers: { omniauth_callbacks: "pros/omniauth_callbacks" }
  root to: 'home#index'
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end

[Asandolo]

I found the secnd model link with his error

class Period < ApplicationRecord
  belongs_to :pro
  belongs_to :establishment
end

but I can't find the probleme

The pro dashboard :

require "administrate/base_dashboard"

class ProDashboard < Administrate::BaseDashboard
  # ATTRIBUTE_TYPES
  # a hash that describes the type of each of the model's fields.
  #
  # Each different type represents an Administrate::Field object,
  # which determines how the attribute is displayed
  # on pages throughout the dashboard.
  ATTRIBUTE_TYPES = {
    notification_pros: Field::HasMany,
    service_pros: Field::HasMany,
    periods: Field::HasMany,
    establishment: Field::BelongsTo,
    rdvs: Field::HasMany,
    id: Field::Number,
    email: Field::String,
    encrypted_password: Field::String,
    reset_password_token: Field::String,
    reset_password_sent_at: Field::DateTime,
    remember_created_at: Field::DateTime,
    first_name: Field::String,
    last_name: Field::String,
    announcements_last_read_at: Field::DateTime,
    admin: Field::Boolean,
    created_at: Field::DateTime,
    updated_at: Field::DateTime,
    typ: Field::Number,
  }.freeze

  # COLLECTION_ATTRIBUTES
  # an array of attributes that will be displayed on the model's index page.
  #
  # By default, it's limited to four items to reduce clutter on index pages.
  # Feel free to add, remove, or rearrange items.
  COLLECTION_ATTRIBUTES = [
    :notification_pros,
    :service_pros,
    :periods,
    :establishment,
  ].freeze

  # SHOW_PAGE_ATTRIBUTES
  # an array of attributes that will be displayed on the model's show page.
  SHOW_PAGE_ATTRIBUTES = [
    :notification_pros,
    :service_pros,
    :periods,
    :establishment,
    :rdvs,
    :id,
    :email,
    :encrypted_password,
    :reset_password_token,
    :reset_password_sent_at,
    :remember_created_at,
    :first_name,
    :last_name,
    :announcements_last_read_at,
    :admin,
    :created_at,
    :updated_at,
    :typ,
  ].freeze

  # FORM_ATTRIBUTES
  # an array of attributes that will be displayed
  # on the model's form (`new` and `edit`) pages.
  FORM_ATTRIBUTES = [
    :notification_pros,
    :service_pros,
    :periods,
    :establishment,
    :rdvs,
    :email,
    :encrypted_password,
    :reset_password_token,
    :reset_password_sent_at,
    :remember_created_at,
    :first_name,
    :last_name,
    :announcements_last_read_at,
    :admin,
    :typ,
  ].freeze

  # Overwrite this method to customize how pros are displayed
  # across all pages of the admin dashboard.
  #
  # def display_resource(pro)
  #   "Pro ##{pro.id}"
  # end
end

[jean-francois-labbe]

I have the same issue. When adding a Field::HasMany attribute and showing an object in administrate that as some relations in the has_many side.

Have you found a fix?

[Asandolo]

@jean-francois-labbe bonjour,

J'ai totalement réinstaller la gem et ça a marché.

[pablobm]

This might be a matter of restarting Spring (./bin/spring stop). If anyone is still seeing it, please let us know here. Meanwhile I'm going to close.

[tylerdavis]

Hey there, we're seeing the same error in our system as well.

[pablobm]

@tylerdavis - Does restarting Spring (or the whole computer) help? If not, can you provide an exception backtrace, as well as some details like the original reporter above? Thank you!

[tylerdavis]

@pablobm apologies, I missed your response. This is happening on production for us. Here's a recent event - https://sentry.io/share/issue/a4806402bae54a0cbfe505d5b80b7814/

Please let me know if there's any other information I can provide.

[nickcharlton]

Can you open an a new issue, and (like this one) show what your model layout looks like?

[DRBragg]

For anyone else running into this issue, I too ran into this with my "Users" show page. I spent some time digging into it and found a workaround (for my application at least).

I generated the HasMany field partials using rails generate administrate:views:field has_many.

Inside app/view/fields/has_many/_show.html.erb I added the following, after page_number is set and before the collection is rendered:

<% page ||= Administrate::Page::Show.new(UserDashboard.new, field.resource) %>

This works for me and all other dashboard still render normally. Again, this is for may specific application, I was only having the issue on my "Users" show page. Still, I hope this at least helps.

[pablobm]

Thank you for that Sentry link. I'm pasting here what I think is the most relevant excerpt:

NameError: undefined local variable or method `page' for #<#<Class:0x000055bb97918f68>:0x00007f2b745589e8>
  from /usr/local/bundle/gems/administrate-0.13.0/app/views/fields/has_many/_show.html.erb:28:in `__usr_local_bundle_gems_administrate________app_views_fields_has_many__show_html_erb___3015974621036392267_69912306284280'
  from action_view/renderer/renderer.rb:61:in `render_template_to_object'
  from action_view/renderer/renderer.rb:29:in `render_to_object'
  from action_view/rendering.rb:118:in `block in _render_template'
  from action_view/base.rb:304:in `in_rendering_context'
  from action_view/rendering.rb:117:in `_render_template'
  from action_controller/metal/streaming.rb:219:in `_render_template'
  from action_view/rendering.rb:103:in `render_to_body'
  from action_controller/metal/rendering.rb:52:in `render_to_body'
  from action_controller/metal/renderers.rb:142:in `render_to_body'
  from abstract_controller/rendering.rb:25:in `render'
  from action_controller/metal/rendering.rb:36:in `render'
  from action_controller/metal/instrumentation.rb:44:in `block (2 levels) in render'
  from active_support/core_ext/benchmark.rb:14:in `block in ms'
  from benchmark.rb:308:in `realtime'
  from active_support/core_ext/benchmark.rb:14:in `ms'
  from action_controller/metal/instrumentation.rb:44:in `block in render'
  from action_controller/metal/instrumentation.rb:85:in `cleanup_view_runtime'
  from active_record/railties/controller_runtime.rb:34:in `cleanup_view_runtime'
  from action_controller/metal/instrumentation.rb:43:in `render'
  from meta_tags/controller_helper.rb:22:in `render'
  from administrate/application_controller.rb:24:in `show'
  ...

Something that confuses me is how the exception backtrace doesn't list any Administrate code between the _show.html.erb partial (top of the stack) and administrate/application_controller.rb (bottom of my excerpt). Is this perhaps only the "framework" trace, filtering out the "app" trace? If this is the case, could it be that your app is using a custom administrate/application/show.html.erb template, or a custom render_field helper? Asking for those specifically as I would expect them to appear in between.

[nickcharlton]

I'm going to close this as it's been a while and there's potentially a few things going on here. I'd recommend trying the solution mentioned above and making sure you're using trying the stock show.html.erb or render_field helper, but if none of that helps, please open a new issue.