Rails 5 fields_for namespaced classes
up vote
0
down vote
favorite
I'm having some trouble with nested attributes when the defined classes are inside a module:
# file bar.rb
module Abc
class Bar << ActiveRecord::Base
has_many :foos
accepts_nested_attributes_for :foos
end
end
# file foo.rb
module Abc
class Foo << ActiveRecord::Base
belongs_to :bar
# let's consider an attribute: qux
end
end
# inside the controller
def new
@bar = Abc::Bar.new
end
# inside a view
<%= form_for @bar .... do |f| %>
....
<%= f.fields_for :abc_foos, @bar.foos do |ff| %>
<%= ff.hidden_field :qux, value: true %>
<% end %>
<% end %>
Now we got the prefix "abc" in the names attributes>
# the rendered html
<input type="hidden" name="abc_bar[abc_foos][qux]" ... />
The params now comes with the abc_foos included:
# the params hash
"abc_bar" =>
....
"abc_foos" => "qux" => "some value"
The problem: the accepts_nested_attributes_for method creates something like "abc_foos_attributes=" in order to receive the attributes, but the default param key name is different. So, this will not work:
# in the controller, again
def create
@bar = Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, abc_foos: [:qux]))
end
I get the error:
unknown attribute 'abc_foos' for Abc::Bar.
I would expect something like "foos_attributes" as the appropriate key. What am I missing?
Thanks!
The full bactrace:
activemodel (5.2.1) lib/active_model/attribute_assignment.rb:53:in `_assign_attribute'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:31:in `block in assign_nested_parameter_attributes'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:31:in `each'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:31:in `assign_nested_parameter_attributes'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:25:in `_assign_attributes'
activemodel (5.2.1) lib/active_model/attribute_assignment.rb:35:in `assign_attributes'
activerecord (5.2.1) lib/active_record/core.rb:314:in `initialize'
activerecord (5.2.1) lib/active_record/inheritance.rb:66:in `new'
activerecord (5.2.1) lib/active_record/inheritance.rb:66:in `new'
app/controllers/bar_controller.rb:33:in `create'
actionpack (5.2.1) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack (5.2.1) lib/abstract_controller/base.rb:194:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (5.2.1) lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport (5.2.1) lib/active_support/callbacks.rb:132:in `run_callbacks'
actionpack (5.2.1) lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'
activesupport (5.2.1) lib/active_support/notifications.rb:168:in `block in instrument'
activesupport (5.2.1) lib/active_support/notifications/instrumenter.rb:23:in `instrument'
activesupport (5.2.1) lib/active_support/notifications.rb:168:in `instrument'
actionpack (5.2.1) lib/action_controller/metal/instrumentation.rb:32:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/params_wrapper.rb:256:in `process_action'
activerecord (5.2.1) lib/active_record/railties/controller_runtime.rb:24:in `process_action'
actionpack (5.2.1) lib/abstract_controller/base.rb:134:in `process'
actionview (5.2.1) lib/action_view/rendering.rb:32:in `process'
actionpack (5.2.1) lib/action_controller/metal.rb:191:in `dispatch'
actionpack (5.2.1) lib/action_controller/metal.rb:252:in `dispatch'
actionpack (5.2.1) lib/action_dispatch/routing/route_set.rb:52:in `dispatch'
actionpack (5.2.1) lib/action_dispatch/routing/route_set.rb:34:in `serve'
actionpack (5.2.1) lib/action_dispatch/journey/router.rb:52:in `block in serve'
actionpack (5.2.1) lib/action_dispatch/journey/router.rb:35:in `each'
actionpack (5.2.1) lib/action_dispatch/journey/router.rb:35:in `serve'
actionpack (5.2.1) lib/action_dispatch/routing/route_set.rb:840:in `call'
rack (2.0.6) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.0.6) lib/rack/etag.rb:25:in `call'
rack (2.0.6) lib/rack/conditional_get.rb:38:in `call'
rack (2.0.6) lib/rack/head.rb:12:in `call'
actionpack (5.2.1) lib/action_dispatch/http/content_security_policy.rb:18:in `call'
rack (2.0.6) lib/rack/session/abstract/id.rb:232:in `context'
rack (2.0.6) lib/rack/session/abstract/id.rb:226:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/cookies.rb:670:in `call'
activerecord (5.2.1) lib/active_record/migration.rb:559:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (5.2.1) lib/active_support/callbacks.rb:98:in `run_callbacks'
actionpack (5.2.1) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:61:in `call'
web-console (3.7.0) lib/web_console/middleware.rb:135:in `call_app'
web-console (3.7.0) lib/web_console/middleware.rb:22:in `block in call'
web-console (3.7.0) lib/web_console/middleware.rb:20:in `catch'
web-console (3.7.0) lib/web_console/middleware.rb:20:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (5.2.1) lib/rails/rack/logger.rb:38:in `call_app'
railties (5.2.1) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (5.2.1) lib/active_support/tagged_logging.rb:71:in `block in tagged'
activesupport (5.2.1) lib/active_support/tagged_logging.rb:28:in `tagged'
activesupport (5.2.1) lib/active_support/tagged_logging.rb:71:in `tagged'
railties (5.2.1) lib/rails/rack/logger.rb:26:in `call'
sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.0.6) lib/rack/method_override.rb:22:in `call'
rack (2.0.6) lib/rack/runtime.rb:22:in `call'
activesupport (5.2.1) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/static.rb:127:in `call'
rack (2.0.6) lib/rack/sendfile.rb:111:in `call'
railties (5.2.1) lib/rails/engine.rb:524:in `call'
puma (3.12.0) lib/puma/configuration.rb:225:in `call'
puma (3.12.0) lib/puma/server.rb:658:in `handle_request'
puma (3.12.0) lib/puma/server.rb:472:in `process_client'
puma (3.12.0) lib/puma/server.rb:332:in `block in run'
puma (3.12.0) lib/puma/thread_pool.rb:133:in `block in spawn_thread'
ruby-on-rails ruby ruby-on-rails-5 fields-for
asked Nov 12 at 1:56
josias
6816
add a comment |
up vote
0
down vote
favorite
I'm having some trouble with nested attributes when the defined classes are inside a module:
# file bar.rb
module Abc
class Bar << ActiveRecord::Base
has_many :foos
accepts_nested_attributes_for :foos
end
end
# file foo.rb
module Abc
class Foo << ActiveRecord::Base
belongs_to :bar
# let's consider an attribute: qux
end
end
# inside the controller
def new
@bar = Abc::Bar.new
end
# inside a view
<%= form_for @bar .... do |f| %>
....
<%= f.fields_for :abc_foos, @bar.foos do |ff| %>
<%= ff.hidden_field :qux, value: true %>
<% end %>
<% end %>
Now we got the prefix "abc" in the names attributes>
# the rendered html
<input type="hidden" name="abc_bar[abc_foos][qux]" ... />
The params now comes with the abc_foos included:
# the params hash
"abc_bar" =>
....
"abc_foos" => "qux" => "some value"
The problem: the accepts_nested_attributes_for method creates something like "abc_foos_attributes=" in order to receive the attributes, but the default param key name is different. So, this will not work:
# in the controller, again
def create
@bar = Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, abc_foos: [:qux]))
end
I get the error:
unknown attribute 'abc_foos' for Abc::Bar.
I would expect something like "foos_attributes" as the appropriate key. What am I missing?
Thanks!
The full bactrace:
activemodel (5.2.1) lib/active_model/attribute_assignment.rb:53:in `_assign_attribute'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:31:in `block in assign_nested_parameter_attributes'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:31:in `each'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:31:in `assign_nested_parameter_attributes'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:25:in `_assign_attributes'
activemodel (5.2.1) lib/active_model/attribute_assignment.rb:35:in `assign_attributes'
activerecord (5.2.1) lib/active_record/core.rb:314:in `initialize'
activerecord (5.2.1) lib/active_record/inheritance.rb:66:in `new'
activerecord (5.2.1) lib/active_record/inheritance.rb:66:in `new'
app/controllers/bar_controller.rb:33:in `create'
actionpack (5.2.1) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack (5.2.1) lib/abstract_controller/base.rb:194:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (5.2.1) lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport (5.2.1) lib/active_support/callbacks.rb:132:in `run_callbacks'
actionpack (5.2.1) lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'
activesupport (5.2.1) lib/active_support/notifications.rb:168:in `block in instrument'
activesupport (5.2.1) lib/active_support/notifications/instrumenter.rb:23:in `instrument'
activesupport (5.2.1) lib/active_support/notifications.rb:168:in `instrument'
actionpack (5.2.1) lib/action_controller/metal/instrumentation.rb:32:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/params_wrapper.rb:256:in `process_action'
activerecord (5.2.1) lib/active_record/railties/controller_runtime.rb:24:in `process_action'
actionpack (5.2.1) lib/abstract_controller/base.rb:134:in `process'
actionview (5.2.1) lib/action_view/rendering.rb:32:in `process'
actionpack (5.2.1) lib/action_controller/metal.rb:191:in `dispatch'
actionpack (5.2.1) lib/action_controller/metal.rb:252:in `dispatch'
actionpack (5.2.1) lib/action_dispatch/routing/route_set.rb:52:in `dispatch'
actionpack (5.2.1) lib/action_dispatch/routing/route_set.rb:34:in `serve'
actionpack (5.2.1) lib/action_dispatch/journey/router.rb:52:in `block in serve'
actionpack (5.2.1) lib/action_dispatch/journey/router.rb:35:in `each'
actionpack (5.2.1) lib/action_dispatch/journey/router.rb:35:in `serve'
actionpack (5.2.1) lib/action_dispatch/routing/route_set.rb:840:in `call'
rack (2.0.6) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.0.6) lib/rack/etag.rb:25:in `call'
rack (2.0.6) lib/rack/conditional_get.rb:38:in `call'
rack (2.0.6) lib/rack/head.rb:12:in `call'
actionpack (5.2.1) lib/action_dispatch/http/content_security_policy.rb:18:in `call'
rack (2.0.6) lib/rack/session/abstract/id.rb:232:in `context'
rack (2.0.6) lib/rack/session/abstract/id.rb:226:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/cookies.rb:670:in `call'
activerecord (5.2.1) lib/active_record/migration.rb:559:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (5.2.1) lib/active_support/callbacks.rb:98:in `run_callbacks'
actionpack (5.2.1) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:61:in `call'
web-console (3.7.0) lib/web_console/middleware.rb:135:in `call_app'
web-console (3.7.0) lib/web_console/middleware.rb:22:in `block in call'
web-console (3.7.0) lib/web_console/middleware.rb:20:in `catch'
web-console (3.7.0) lib/web_console/middleware.rb:20:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (5.2.1) lib/rails/rack/logger.rb:38:in `call_app'
railties (5.2.1) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (5.2.1) lib/active_support/tagged_logging.rb:71:in `block in tagged'
activesupport (5.2.1) lib/active_support/tagged_logging.rb:28:in `tagged'
activesupport (5.2.1) lib/active_support/tagged_logging.rb:71:in `tagged'
railties (5.2.1) lib/rails/rack/logger.rb:26:in `call'
sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.0.6) lib/rack/method_override.rb:22:in `call'
rack (2.0.6) lib/rack/runtime.rb:22:in `call'
activesupport (5.2.1) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/static.rb:127:in `call'
rack (2.0.6) lib/rack/sendfile.rb:111:in `call'
railties (5.2.1) lib/rails/engine.rb:524:in `call'
puma (3.12.0) lib/puma/configuration.rb:225:in `call'
puma (3.12.0) lib/puma/server.rb:658:in `handle_request'
puma (3.12.0) lib/puma/server.rb:472:in `process_client'
puma (3.12.0) lib/puma/server.rb:332:in `block in run'
puma (3.12.0) lib/puma/thread_pool.rb:133:in `block in spawn_thread'
ruby-on-rails ruby ruby-on-rails-5 fields-for
asked Nov 12 at 1:56
josias
6816
1
probably needs to bef.fields_for :foosbecauseabc_foosisn't a valid instance method onAbc::Bar
– Josh Brody
Nov 12 at 2:01
Have you tried ?Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, abc_foos_attributes: [:qux]))
– Shiko
Nov 12 at 2:12
I have tried with the "attributes" sufix. When I do this I get: undefined method `' for nil:NilClass
– josias
Nov 12 at 2:31
Hi Josh. I tried the :foos alternative. In this case I get the same error above: undefined method for nil:NilClass
– josias
Nov 12 at 2:37
Hi Josh, again. I forgot to mention that the inputs aren't generated in this case.
– josias
Nov 12 at 2:43
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I'm having some trouble with nested attributes when the defined classes are inside a module:
# file bar.rb
module Abc
class Bar << ActiveRecord::Base
has_many :foos
accepts_nested_attributes_for :foos
end
end
# file foo.rb
module Abc
class Foo << ActiveRecord::Base
belongs_to :bar
# let's consider an attribute: qux
end
end
# inside the controller
def new
@bar = Abc::Bar.new
end
# inside a view
<%= form_for @bar .... do |f| %>
....
<%= f.fields_for :abc_foos, @bar.foos do |ff| %>
<%= ff.hidden_field :qux, value: true %>
<% end %>
<% end %>
Now we got the prefix "abc" in the names attributes>
# the rendered html
<input type="hidden" name="abc_bar[abc_foos][qux]" ... />
The params now comes with the abc_foos included:
# the params hash
"abc_bar" =>
....
"abc_foos" => "qux" => "some value"
The problem: the accepts_nested_attributes_for method creates something like "abc_foos_attributes=" in order to receive the attributes, but the default param key name is different. So, this will not work:
# in the controller, again
def create
@bar = Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, abc_foos: [:qux]))
end
I get the error:
unknown attribute 'abc_foos' for Abc::Bar.
I would expect something like "foos_attributes" as the appropriate key. What am I missing?
Thanks!
The full bactrace:
activemodel (5.2.1) lib/active_model/attribute_assignment.rb:53:in `_assign_attribute'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:31:in `block in assign_nested_parameter_attributes'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:31:in `each'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:31:in `assign_nested_parameter_attributes'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:25:in `_assign_attributes'
activemodel (5.2.1) lib/active_model/attribute_assignment.rb:35:in `assign_attributes'
activerecord (5.2.1) lib/active_record/core.rb:314:in `initialize'
activerecord (5.2.1) lib/active_record/inheritance.rb:66:in `new'
activerecord (5.2.1) lib/active_record/inheritance.rb:66:in `new'
app/controllers/bar_controller.rb:33:in `create'
actionpack (5.2.1) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack (5.2.1) lib/abstract_controller/base.rb:194:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (5.2.1) lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport (5.2.1) lib/active_support/callbacks.rb:132:in `run_callbacks'
actionpack (5.2.1) lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'
activesupport (5.2.1) lib/active_support/notifications.rb:168:in `block in instrument'
activesupport (5.2.1) lib/active_support/notifications/instrumenter.rb:23:in `instrument'
activesupport (5.2.1) lib/active_support/notifications.rb:168:in `instrument'
actionpack (5.2.1) lib/action_controller/metal/instrumentation.rb:32:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/params_wrapper.rb:256:in `process_action'
activerecord (5.2.1) lib/active_record/railties/controller_runtime.rb:24:in `process_action'
actionpack (5.2.1) lib/abstract_controller/base.rb:134:in `process'
actionview (5.2.1) lib/action_view/rendering.rb:32:in `process'
actionpack (5.2.1) lib/action_controller/metal.rb:191:in `dispatch'
actionpack (5.2.1) lib/action_controller/metal.rb:252:in `dispatch'
actionpack (5.2.1) lib/action_dispatch/routing/route_set.rb:52:in `dispatch'
actionpack (5.2.1) lib/action_dispatch/routing/route_set.rb:34:in `serve'
actionpack (5.2.1) lib/action_dispatch/journey/router.rb:52:in `block in serve'
actionpack (5.2.1) lib/action_dispatch/journey/router.rb:35:in `each'
actionpack (5.2.1) lib/action_dispatch/journey/router.rb:35:in `serve'
actionpack (5.2.1) lib/action_dispatch/routing/route_set.rb:840:in `call'
rack (2.0.6) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.0.6) lib/rack/etag.rb:25:in `call'
rack (2.0.6) lib/rack/conditional_get.rb:38:in `call'
rack (2.0.6) lib/rack/head.rb:12:in `call'
actionpack (5.2.1) lib/action_dispatch/http/content_security_policy.rb:18:in `call'
rack (2.0.6) lib/rack/session/abstract/id.rb:232:in `context'
rack (2.0.6) lib/rack/session/abstract/id.rb:226:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/cookies.rb:670:in `call'
activerecord (5.2.1) lib/active_record/migration.rb:559:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (5.2.1) lib/active_support/callbacks.rb:98:in `run_callbacks'
actionpack (5.2.1) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:61:in `call'
web-console (3.7.0) lib/web_console/middleware.rb:135:in `call_app'
web-console (3.7.0) lib/web_console/middleware.rb:22:in `block in call'
web-console (3.7.0) lib/web_console/middleware.rb:20:in `catch'
web-console (3.7.0) lib/web_console/middleware.rb:20:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (5.2.1) lib/rails/rack/logger.rb:38:in `call_app'
railties (5.2.1) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (5.2.1) lib/active_support/tagged_logging.rb:71:in `block in tagged'
activesupport (5.2.1) lib/active_support/tagged_logging.rb:28:in `tagged'
activesupport (5.2.1) lib/active_support/tagged_logging.rb:71:in `tagged'
railties (5.2.1) lib/rails/rack/logger.rb:26:in `call'
sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.0.6) lib/rack/method_override.rb:22:in `call'
rack (2.0.6) lib/rack/runtime.rb:22:in `call'
activesupport (5.2.1) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/static.rb:127:in `call'
rack (2.0.6) lib/rack/sendfile.rb:111:in `call'
railties (5.2.1) lib/rails/engine.rb:524:in `call'
puma (3.12.0) lib/puma/configuration.rb:225:in `call'
puma (3.12.0) lib/puma/server.rb:658:in `handle_request'
puma (3.12.0) lib/puma/server.rb:472:in `process_client'
puma (3.12.0) lib/puma/server.rb:332:in `block in run'
puma (3.12.0) lib/puma/thread_pool.rb:133:in `block in spawn_thread'
ruby-on-rails ruby ruby-on-rails-5 fields-for
asked Nov 12 at 1:56
josias
6816
I'm having some trouble with nested attributes when the defined classes are inside a module:
# file bar.rb
module Abc
class Bar << ActiveRecord::Base
has_many :foos
accepts_nested_attributes_for :foos
end
end
# file foo.rb
module Abc
class Foo << ActiveRecord::Base
belongs_to :bar
# let's consider an attribute: qux
end
end
# inside the controller
def new
@bar = Abc::Bar.new
end
# inside a view
<%= form_for @bar .... do |f| %>
....
<%= f.fields_for :abc_foos, @bar.foos do |ff| %>
<%= ff.hidden_field :qux, value: true %>
<% end %>
<% end %>
Now we got the prefix "abc" in the names attributes>
# the rendered html
<input type="hidden" name="abc_bar[abc_foos][qux]" ... />
The params now comes with the abc_foos included:
# the params hash
"abc_bar" =>
....
"abc_foos" => "qux" => "some value"
The problem: the accepts_nested_attributes_for method creates something like "abc_foos_attributes=" in order to receive the attributes, but the default param key name is different. So, this will not work:
# in the controller, again
def create
@bar = Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, abc_foos: [:qux]))
end
I get the error:
unknown attribute 'abc_foos' for Abc::Bar.
I would expect something like "foos_attributes" as the appropriate key. What am I missing?
Thanks!
The full bactrace:
activemodel (5.2.1) lib/active_model/attribute_assignment.rb:53:in `_assign_attribute'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:31:in `block in assign_nested_parameter_attributes'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:31:in `each'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:31:in `assign_nested_parameter_attributes'
activerecord (5.2.1) lib/active_record/attribute_assignment.rb:25:in `_assign_attributes'
activemodel (5.2.1) lib/active_model/attribute_assignment.rb:35:in `assign_attributes'
activerecord (5.2.1) lib/active_record/core.rb:314:in `initialize'
activerecord (5.2.1) lib/active_record/inheritance.rb:66:in `new'
activerecord (5.2.1) lib/active_record/inheritance.rb:66:in `new'
app/controllers/bar_controller.rb:33:in `create'
actionpack (5.2.1) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack (5.2.1) lib/abstract_controller/base.rb:194:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (5.2.1) lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport (5.2.1) lib/active_support/callbacks.rb:132:in `run_callbacks'
actionpack (5.2.1) lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'
activesupport (5.2.1) lib/active_support/notifications.rb:168:in `block in instrument'
activesupport (5.2.1) lib/active_support/notifications/instrumenter.rb:23:in `instrument'
activesupport (5.2.1) lib/active_support/notifications.rb:168:in `instrument'
actionpack (5.2.1) lib/action_controller/metal/instrumentation.rb:32:in `process_action'
actionpack (5.2.1) lib/action_controller/metal/params_wrapper.rb:256:in `process_action'
activerecord (5.2.1) lib/active_record/railties/controller_runtime.rb:24:in `process_action'
actionpack (5.2.1) lib/abstract_controller/base.rb:134:in `process'
actionview (5.2.1) lib/action_view/rendering.rb:32:in `process'
actionpack (5.2.1) lib/action_controller/metal.rb:191:in `dispatch'
actionpack (5.2.1) lib/action_controller/metal.rb:252:in `dispatch'
actionpack (5.2.1) lib/action_dispatch/routing/route_set.rb:52:in `dispatch'
actionpack (5.2.1) lib/action_dispatch/routing/route_set.rb:34:in `serve'
actionpack (5.2.1) lib/action_dispatch/journey/router.rb:52:in `block in serve'
actionpack (5.2.1) lib/action_dispatch/journey/router.rb:35:in `each'
actionpack (5.2.1) lib/action_dispatch/journey/router.rb:35:in `serve'
actionpack (5.2.1) lib/action_dispatch/routing/route_set.rb:840:in `call'
rack (2.0.6) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.0.6) lib/rack/etag.rb:25:in `call'
rack (2.0.6) lib/rack/conditional_get.rb:38:in `call'
rack (2.0.6) lib/rack/head.rb:12:in `call'
actionpack (5.2.1) lib/action_dispatch/http/content_security_policy.rb:18:in `call'
rack (2.0.6) lib/rack/session/abstract/id.rb:232:in `context'
rack (2.0.6) lib/rack/session/abstract/id.rb:226:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/cookies.rb:670:in `call'
activerecord (5.2.1) lib/active_record/migration.rb:559:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (5.2.1) lib/active_support/callbacks.rb:98:in `run_callbacks'
actionpack (5.2.1) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:61:in `call'
web-console (3.7.0) lib/web_console/middleware.rb:135:in `call_app'
web-console (3.7.0) lib/web_console/middleware.rb:22:in `block in call'
web-console (3.7.0) lib/web_console/middleware.rb:20:in `catch'
web-console (3.7.0) lib/web_console/middleware.rb:20:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (5.2.1) lib/rails/rack/logger.rb:38:in `call_app'
railties (5.2.1) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (5.2.1) lib/active_support/tagged_logging.rb:71:in `block in tagged'
activesupport (5.2.1) lib/active_support/tagged_logging.rb:28:in `tagged'
activesupport (5.2.1) lib/active_support/tagged_logging.rb:71:in `tagged'
railties (5.2.1) lib/rails/rack/logger.rb:26:in `call'
sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:13:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.0.6) lib/rack/method_override.rb:22:in `call'
rack (2.0.6) lib/rack/runtime.rb:22:in `call'
activesupport (5.2.1) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (5.2.1) lib/action_dispatch/middleware/static.rb:127:in `call'
rack (2.0.6) lib/rack/sendfile.rb:111:in `call'
railties (5.2.1) lib/rails/engine.rb:524:in `call'
puma (3.12.0) lib/puma/configuration.rb:225:in `call'
puma (3.12.0) lib/puma/server.rb:658:in `handle_request'
puma (3.12.0) lib/puma/server.rb:472:in `process_client'
puma (3.12.0) lib/puma/server.rb:332:in `block in run'
puma (3.12.0) lib/puma/thread_pool.rb:133:in `block in spawn_thread'
ruby-on-rails ruby ruby-on-rails-5 fields-for
ruby-on-rails ruby ruby-on-rails-5 fields-for
asked Nov 12 at 1:56
josias
6816
asked Nov 12 at 1:56
josias
6816
edited Nov 13 at 2:28
asked Nov 12 at 1:56
josias
6816
asked Nov 12 at 1:56
josias
6816
asked Nov 12 at 1:56
josias
6816
6816
1
probably needs to bef.fields_for :foosbecauseabc_foosisn't a valid instance method onAbc::Bar
– Josh Brody
Nov 12 at 2:01
Have you tried ?Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, abc_foos_attributes: [:qux]))
– Shiko
Nov 12 at 2:12
I have tried with the "attributes" sufix. When I do this I get: undefined method `' for nil:NilClass
– josias
Nov 12 at 2:31
Hi Josh. I tried the :foos alternative. In this case I get the same error above: undefined method for nil:NilClass
– josias
Nov 12 at 2:37
Hi Josh, again. I forgot to mention that the inputs aren't generated in this case.
– josias
Nov 12 at 2:43
add a comment |
1
probably needs to bef.fields_for :foosbecauseabc_foosisn't a valid instance method onAbc::Bar
– Josh Brody
Nov 12 at 2:01
Have you tried ?Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, abc_foos_attributes: [:qux]))
– Shiko
Nov 12 at 2:12
I have tried with the "attributes" sufix. When I do this I get: undefined method `' for nil:NilClass
– josias
Nov 12 at 2:31
Hi Josh. I tried the :foos alternative. In this case I get the same error above: undefined method for nil:NilClass
– josias
Nov 12 at 2:37
Hi Josh, again. I forgot to mention that the inputs aren't generated in this case.
– josias
Nov 12 at 2:43
1
1
probably needs to be
f.fields_for :foos because abc_foos isn't a valid instance method on Abc::Bar– Josh Brody
Nov 12 at 2:01
probably needs to be
f.fields_for :foos because abc_foos isn't a valid instance method on Abc::Bar– Josh Brody
Nov 12 at 2:01
Have you tried ?
Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, abc_foos_attributes: [:qux]))– Shiko
Nov 12 at 2:12
Have you tried ?
Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, abc_foos_attributes: [:qux]))– Shiko
Nov 12 at 2:12
I have tried with the "attributes" sufix. When I do this I get: undefined method `' for nil:NilClass
– josias
Nov 12 at 2:31
I have tried with the "attributes" sufix. When I do this I get: undefined method `' for nil:NilClass
– josias
Nov 12 at 2:31
Hi Josh. I tried the :foos alternative. In this case I get the same error above: undefined method for nil:NilClass
– josias
Nov 12 at 2:37
Hi Josh. I tried the :foos alternative. In this case I get the same error above: undefined method for nil:NilClass
– josias
Nov 12 at 2:37
Hi Josh, again. I forgot to mention that the inputs aren't generated in this case.
– josias
Nov 12 at 2:43
Hi Josh, again. I forgot to mention that the inputs aren't generated in this case.
– josias
Nov 12 at 2:43
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
Can you post full backtrace errors? But in the meantime if you try
<%= f.fields_for :foos, @bar.foos do |foo| %>
<%= foo.hidden_field :qux, value: true %>
<% end %>
you probably also need to do
@bar = Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, foos: [:qux]))
answered Nov 12 at 8:19
lacostenycoder
3,63311226
Hi! I have tried this too, in this case the inputs are not generated and then :foos becomes nil. I'll update the question with the backtrace, Thanks!
– josias
Nov 12 at 12:12
add a comment |
Your Answer
StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53255100%2frails-5-fields-for-namespaced-classes%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
Can you post full backtrace errors? But in the meantime if you try
<%= f.fields_for :foos, @bar.foos do |foo| %>
<%= foo.hidden_field :qux, value: true %>
<% end %>
you probably also need to do
@bar = Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, foos: [:qux]))
answered Nov 12 at 8:19
lacostenycoder
3,63311226
Hi! I have tried this too, in this case the inputs are not generated and then :foos becomes nil. I'll update the question with the backtrace, Thanks!
– josias
Nov 12 at 12:12
add a comment |
up vote
0
down vote
Can you post full backtrace errors? But in the meantime if you try
<%= f.fields_for :foos, @bar.foos do |foo| %>
<%= foo.hidden_field :qux, value: true %>
<% end %>
you probably also need to do
@bar = Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, foos: [:qux]))
answered Nov 12 at 8:19
lacostenycoder
3,63311226
Hi! I have tried this too, in this case the inputs are not generated and then :foos becomes nil. I'll update the question with the backtrace, Thanks!
– josias
Nov 12 at 12:12
add a comment |
up vote
0
down vote
up vote
0
down vote
Can you post full backtrace errors? But in the meantime if you try
<%= f.fields_for :foos, @bar.foos do |foo| %>
<%= foo.hidden_field :qux, value: true %>
<% end %>
you probably also need to do
@bar = Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, foos: [:qux]))
answered Nov 12 at 8:19
lacostenycoder
3,63311226
Can you post full backtrace errors? But in the meantime if you try
<%= f.fields_for :foos, @bar.foos do |foo| %>
<%= foo.hidden_field :qux, value: true %>
<% end %>
you probably also need to do
@bar = Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, foos: [:qux]))
answered Nov 12 at 8:19
lacostenycoder
3,63311226
answered Nov 12 at 8:19
lacostenycoder
3,63311226
answered Nov 12 at 8:19
lacostenycoder
3,63311226
answered Nov 12 at 8:19
lacostenycoder
3,63311226
3,63311226
Hi! I have tried this too, in this case the inputs are not generated and then :foos becomes nil. I'll update the question with the backtrace, Thanks!
– josias
Nov 12 at 12:12
add a comment |
Hi! I have tried this too, in this case the inputs are not generated and then :foos becomes nil. I'll update the question with the backtrace, Thanks!
– josias
Nov 12 at 12:12
Hi! I have tried this too, in this case the inputs are not generated and then :foos becomes nil. I'll update the question with the backtrace, Thanks!
– josias
Nov 12 at 12:12
Hi! I have tried this too, in this case the inputs are not generated and then :foos becomes nil. I'll update the question with the backtrace, Thanks!
– josias
Nov 12 at 12:12
add a comment |
draft saved
draft discarded
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53255100%2frails-5-fields-for-namespaced-classes%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
1
probably needs to be
f.fields_for :foosbecauseabc_foosisn't a valid instance method onAbc::Bar– Josh Brody
Nov 12 at 2:01
Have you tried ?
Abc::Bar.new(params.require(:abc_bar).permit(:a, :b, abc_foos_attributes: [:qux]))– Shiko
Nov 12 at 2:12
I have tried with the "attributes" sufix. When I do this I get: undefined method `' for nil:NilClass
– josias
Nov 12 at 2:31
Hi Josh. I tried the :foos alternative. In this case I get the same error above: undefined method for nil:NilClass
– josias
Nov 12 at 2:37
Hi Josh, again. I forgot to mention that the inputs aren't generated in this case.
– josias
Nov 12 at 2:43