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administrate gem customizing labels used for resources in dashboard collections

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The administrate gem guide indicates the labels for ressources can be adapted to attributes of that model

def display_resource(user)
  user.name
end

However this does not appear to function on relations

Card belongs_to User and the goal is to represent the ressource user in the CardDashboard with

card.user.last_name + ', ' + card.user.first_name

However, even a succinct definition

def display_resource(user)
  card.user.last_name
end

leads to undefined local variable or method 'card' for #<CardDashboard

It appears the display_resource definition is only applicable to its own class as

def display_resource(user)
  user.last_name + ', ' + user.first_name
end

will work.

Is there a mechanism by which the resource label can be defined on a per-class basis using nested attributes ?

update error stack

app/dashboards/user_dashboard.rb:212:in `display_resource'
app/views/admin/cards/_form.html.erb:38
app/views/admin/cards/_form.html.erb:36:in `each'
app/views/admin/cards/_form.html.erb:36
app/views/admin/cards/_form.html.erb:17
app/views/admin/cards/edit.html.erb:35

update

Full stack trace

administrate (0.14.0) lib/administrate/base_dashboard.rb:39:in `block in attribute_type_for'
administrate (0.14.0) lib/administrate/base_dashboard.rb:38:in `fetch'
administrate (0.14.0) lib/administrate/base_dashboard.rb:38:in `attribute_type_for'
administrate (0.14.0) lib/administrate/page/base.rb:30:in `attribute_field'
administrate (0.14.0) lib/administrate/page/form.rb:15:in `block in attributes'
administrate (0.14.0) lib/administrate/page/form.rb:14:in `map'
administrate (0.14.0) lib/administrate/page/form.rb:14:in `attributes'
app/views/admin/cards/_form.html.erb:36
actionview (6.0.3.4) lib/action_view/helpers/capture_helper.rb:45:in `block in capture'
actionview (6.0.3.4) lib/action_view/helpers/capture_helper.rb:209:in `with_output_buffer'
actionview (6.0.3.4) lib/action_view/helpers/capture_helper.rb:45:in `capture'
actionview (6.0.3.4) lib/action_view/helpers/form_helper.rb:452:in `form_for'
client_side_validations (17.2.0) lib/client_side_validations/action_view/form_helper.rb:11:in `form_for'
app/views/admin/cards/_form.html.erb:17
actionview (6.0.3.4) lib/action_view/base.rb:274:in `_run'
actionview (6.0.3.4) lib/action_view/template.rb:185:in `block in render'
activesupport (6.0.3.4) lib/active_support/notifications.rb:182:in `instrument'
actionview (6.0.3.4) lib/action_view/template.rb:385:in `instrument_render_template'
actionview (6.0.3.4) lib/action_view/template.rb:183:in `render'
actionview (6.0.3.4) lib/action_view/renderer/partial_renderer.rb:357:in `block in render_partial'
actionview (6.0.3.4) lib/action_view/renderer/abstract_renderer.rb:88:in `block in instrument'
activesupport (6.0.3.4) lib/active_support/notifications.rb:180:in `block in instrument'
activesupport (6.0.3.4) lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport (6.0.3.4) lib/active_support/notifications.rb:180:in `instrument'
actionview (6.0.3.4) lib/action_view/renderer/abstract_renderer.rb:87:in `instrument'
actionview (6.0.3.4) lib/action_view/renderer/partial_renderer.rb:346:in `render_partial'
actionview (6.0.3.4) lib/action_view/renderer/partial_renderer.rb:317:in `render'
actionview (6.0.3.4) lib/action_view/renderer/renderer.rb:65:in `render_partial_to_object'
actionview (6.0.3.4) lib/action_view/renderer/renderer.rb:53:in `render_partial'
actionview (6.0.3.4) lib/action_view/helpers/rendering_helper.rb:38:in `render'
app/views/admin/cards/edit.html.erb:35
actionview (6.0.3.4) lib/action_view/base.rb:274:in `_run'
actionview (6.0.3.4) lib/action_view/template.rb:185:in `block in render'
activesupport (6.0.3.4) lib/active_support/notifications.rb:182:in `instrument'
actionview (6.0.3.4) lib/action_view/template.rb:385:in `instrument_render_template'
actionview (6.0.3.4) lib/action_view/template.rb:183:in `render'
actionview (6.0.3.4) lib/action_view/renderer/template_renderer.rb:58:in `block (2 levels) in render_template'
actionview (6.0.3.4) lib/action_view/renderer/abstract_renderer.rb:88:in `block in instrument'
activesupport (6.0.3.4) lib/active_support/notifications.rb:180:in `block in instrument'
activesupport (6.0.3.4) lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport (6.0.3.4) lib/active_support/notifications.rb:180:in `instrument'
actionview (6.0.3.4) lib/action_view/renderer/abstract_renderer.rb:87:in `instrument'
actionview (6.0.3.4) lib/action_view/renderer/template_renderer.rb:57:in `block in render_template'
actionview (6.0.3.4) lib/action_view/renderer/template_renderer.rb:65:in `render_with_layout'
actionview (6.0.3.4) lib/action_view/renderer/template_renderer.rb:56:in `render_template'
actionview (6.0.3.4) lib/action_view/renderer/template_renderer.rb:13:in `render'
actionview (6.0.3.4) lib/action_view/renderer/renderer.rb:61:in `render_template_to_object'
actionview (6.0.3.4) lib/action_view/renderer/renderer.rb:29:in `render_to_object'
actionview (6.0.3.4) lib/action_view/rendering.rb:117:in `block in _render_template'
actionview (6.0.3.4) lib/action_view/base.rb:304:in `in_rendering_context'
actionview (6.0.3.4) lib/action_view/rendering.rb:116:in `_render_template'
actionpack (6.0.3.4) lib/action_controller/metal/streaming.rb:218:in `_render_template'
actionview (6.0.3.4) lib/action_view/rendering.rb:103:in `render_to_body'
actionpack (6.0.3.4) lib/action_controller/metal/rendering.rb:52:in `render_to_body'
actionpack (6.0.3.4) lib/action_controller/metal/renderers.rb:142:in `render_to_body'
actionpack (6.0.3.4) lib/abstract_controller/rendering.rb:25:in `render'
actionpack (6.0.3.4) lib/action_controller/metal/rendering.rb:36:in `render'
actionpack (6.0.3.4) lib/action_controller/metal/instrumentation.rb:44:in `block (2 levels) in render'
activesupport (6.0.3.4) lib/active_support/core_ext/benchmark.rb:14:in `block in ms'
/home/uelcom/.rbenv/versions/2.6.1/lib/ruby/2.6.0/benchmark.rb:308:in `realtime'
activesupport (6.0.3.4) lib/active_support/core_ext/benchmark.rb:14:in `ms'
actionpack (6.0.3.4) lib/action_controller/metal/instrumentation.rb:44:in `block in render'
actionpack (6.0.3.4) lib/action_controller/metal/instrumentation.rb:84:in `cleanup_view_runtime'
activerecord (6.0.3.4) lib/active_record/railties/controller_runtime.rb:34:in `cleanup_view_runtime'
actionpack (6.0.3.4) lib/action_controller/metal/instrumentation.rb:43:in `render'
administrate (0.14.0) app/controllers/administrate/application_controller.rb:38:in `edit'
actionpack (6.0.3.4) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack (6.0.3.4) lib/abstract_controller/base.rb:195:in `process_action'
actionpack (6.0.3.4) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (6.0.3.4) lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport (6.0.3.4) lib/active_support/callbacks.rb:135:in `run_callbacks'
actionpack (6.0.3.4) lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack (6.0.3.4) lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack (6.0.3.4) lib/action_controller/metal/instrumentation.rb:33:in `block in process_action'
activesupport (6.0.3.4) lib/active_support/notifications.rb:180:in `block in instrument'
activesupport (6.0.3.4) lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport (6.0.3.4) lib/active_support/notifications.rb:180:in `instrument'
actionpack (6.0.3.4) lib/action_controller/metal/instrumentation.rb:32:in `process_action'
actionpack (6.0.3.4) lib/action_controller/metal/params_wrapper.rb:245:in `process_action'
activerecord (6.0.3.4) lib/active_record/railties/controller_runtime.rb:27:in `process_action'
actionpack (6.0.3.4) lib/abstract_controller/base.rb:136:in `process'
actionview (6.0.3.4) lib/action_view/rendering.rb:39:in `process'
actionpack (6.0.3.4) lib/action_controller/metal.rb:190:in `dispatch'
actionpack (6.0.3.4) lib/action_controller/metal.rb:254:in `dispatch'
actionpack (6.0.3.4) lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
actionpack (6.0.3.4) lib/action_dispatch/routing/route_set.rb:33:in `serve'
actionpack (6.0.3.4) lib/action_dispatch/journey/router.rb:49:in `block in serve'
actionpack (6.0.3.4) lib/action_dispatch/journey/router.rb:32:in `each'
actionpack (6.0.3.4) lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack (6.0.3.4) lib/action_dispatch/routing/route_set.rb:834:in `call'
warden (1.2.9) lib/warden/manager.rb:36:in `block in call'
warden (1.2.9) lib/warden/manager.rb:34:in `catch'
warden (1.2.9) lib/warden/manager.rb:34:in `call'
rack (2.2.3) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.2.3) lib/rack/etag.rb:27:in `call'
rack (2.2.3) lib/rack/conditional_get.rb:27:in `call'
rack (2.2.3) lib/rack/head.rb:12:in `call'
actionpack (6.0.3.4) lib/action_dispatch/http/content_security_policy.rb:18:in `call'
rack (2.2.3) lib/rack/session/abstract/id.rb:266:in `context'
rack (2.2.3) lib/rack/session/abstract/id.rb:260:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/cookies.rb:648:in `call'
activerecord (6.0.3.4) lib/active_record/migration.rb:567:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
activesupport (6.0.3.4) lib/active_support/callbacks.rb:101:in `run_callbacks'
actionpack (6.0.3.4) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/actionable_exceptions.rb:18:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
web-console (4.1.0) lib/web_console/middleware.rb:132:in `call_app'
web-console (4.1.0) lib/web_console/middleware.rb:19:in `block in call'
web-console (4.1.0) lib/web_console/middleware.rb:17:in `catch'
web-console (4.1.0) lib/web_console/middleware.rb:17:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (6.0.3.4) lib/rails/rack/logger.rb:37:in `call_app'
railties (6.0.3.4) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (6.0.3.4) lib/active_support/tagged_logging.rb:80:in `block in tagged'
activesupport (6.0.3.4) lib/active_support/tagged_logging.rb:28:in `tagged'
activesupport (6.0.3.4) lib/active_support/tagged_logging.rb:80:in `tagged'
railties (6.0.3.4) lib/rails/rack/logger.rb:26:in `call'
sprockets-rails (3.2.2) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.2.3) lib/rack/method_override.rb:24:in `call'
rails_same_site_cookie (0.1.8) lib/rails_same_site_cookie/middleware.rb:13:in `call'
rack (2.2.3) lib/rack/runtime.rb:22:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/static.rb:126:in `call'
rack (2.2.3) lib/rack/sendfile.rb:110:in `call'
actionpack (6.0.3.4) lib/action_dispatch/middleware/host_authorization.rb:82:in `call'
webpacker (4.3.0) lib/webpacker/dev_server_proxy.rb:23:in `perform_request'
rack-proxy (0.6.5) lib/rack/proxy.rb:57:in `call'
railties (6.0.3.4) lib/rails/engine.rb:527:in `call'
/usr/lib/ruby/vendor_ruby/phusion_passenger/rack/thread_handler_extension.rb:107:in `process_request'
/usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler/thread_handler.rb:149:in `accept_and_process_next_request'
/usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler/thread_handler.rb:110:in `main_loop'
/usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler.rb:415:in `block (3 levels) in start_threads'
/usr/lib/ruby/vendor_ruby/phusion_passenger/utils.rb:113:in `block in create_thread_and_abort_on_exception'

Update_Dashboards

require "administrate/base_dashboard"

class CardDashboard < Administrate::BaseDashboard
  ATTRIBUTE_TYPES = {
    user: Field::BelongsTo.with_options(
      searchable: true,
      searchable_fields: ['first_name', 'last_name', 'email', 'mobile']
    ),
    id: Field::Number,
    virtual: Field::Boolean,
    blocked: Field::Boolean,
    code: Field::String,
    created_at: Field::DateTime,
    updated_at: Field::DateTime,
  }.freeze

  COLLECTION_ATTRIBUTES = %i[
  user
  id
  virtual
  blocked
  ].freeze

  SHOW_PAGE_ATTRIBUTES = %i[
  user
  id
  virtual
  blocked
  code
  created_at
  updated_at
  ].freeze

  FORM_ATTRIBUTES = %i[
  user
  virtual
  blocked
  code
  ].freeze

  COLLECTION_FILTERS = {}.freeze


  def display_resource(card)
    card.user.last_name + ', ' + card.user.first_name
  end


end

require "administrate/base_dashboard"

class UserDashboard < Administrate::BaseDashboard
  ATTRIBUTE_TYPES = {
    nation: Field::BelongsTo,
    card: Field::HasOne,
    notifications: Field::HasMany,
    attachments: Field::HasMany,
    id: Field::Number,
    last_user_update: Field::Number,
    last_user_update_at: Field::DateTime,
    created_at: Field::DateTime,
    updated_at: Field::DateTime,
  }.freeze

  COLLECTION_ATTRIBUTES = %i[
  id
  email
  mobile
  login_name
  municipal
  newsletter
  ].freeze

  SHOW_PAGE_ATTRIBUTES = %i[
  nation
  card
  notifications
  attachments
  id
  email
  first_name
  last_name
  date_of_birth
  address
  storage_bin
  created_at
  updated_at
  ].freeze

  FORM_ATTRIBUTES = %i[
  nation
  card
  notifications
  attachments
  email
  mobile
  ].freeze

  COLLECTION_FILTERS = {}.freeze
    
  def display_resource(user)
      user ? user.last_name + ', ' + user.first_name : "No user selected"
  end

end
ruby-on-rails administrate
Original Q&A
1

There are 1 best solutions below

8
On

You say that you want to represent cards in the CardDashboard as follows:

card.user.last_name + ', ' + card.user.first_name

Then you use this code example, which is not working:

def display_resource(user)
  card.user.last_name
end

I'm probably missing some info, and your example might have a typo, but what I would expect you to have is the following instead:

def display_resource(card)
  card.user.last_name
end

The method CardDashboard#display_resource will receive cards as arguments, not users. You can't refer to card in your example because it's not defined (your argument is user instead). My example however should work, although it will represent the card as first_name+last_name everywhere, not just when represented as associations in other dashboards.

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