class ActionController::Parameters
Action Controller Parameters¶ ↑
Allows you to choose which attributes should be whitelisted for mass updating and thus prevent accidentally exposing that which shouldn't be exposed. Provides two methods for this purpose: require and permit. The former is used to mark parameters as required. The latter is used to set the parameter as permitted and limit which attributes should be allowed for mass updating.
params = ActionController::Parameters.new({ person: { name: "Francesco", age: 22, role: "admin" } }) permitted = params.require(:person).permit(:name, :age) permitted # => <ActionController::Parameters {"name"=>"Francesco", "age"=>22} permitted: true> permitted.permitted? # => true Person.first.update!(permitted) # => #<Person id: 1, name: "Francesco", age: 22, role: "user">
It provides two options that controls the top-level behavior of new instances:
-
permit_all_parameters
- If it'strue
, all the parameters will be permitted by default. The default isfalse
. -
action_on_unpermitted_parameters
- Allow to control the behavior when parameters that are not explicitly permitted are found. The values can befalse
to just filter them out,:log
to additionally write a message on the logger, or:raise
to raise ActionController::UnpermittedParameters exception. The default value is:log
in test and development environments,false
otherwise.
Examples:
params = ActionController::Parameters.new params.permitted? # => false ActionController::Parameters.permit_all_parameters = true params = ActionController::Parameters.new params.permitted? # => true params = ActionController::Parameters.new(a: "123", b: "456") params.permit(:c) # => <ActionController::Parameters {} permitted: true> ActionController::Parameters.action_on_unpermitted_parameters = :raise params = ActionController::Parameters.new(a: "123", b: "456") params.permit(:c) # => ActionController::UnpermittedParameters: found unpermitted keys: a, b
Please note that these options *are not thread-safe*. In a multi-threaded environment they should only be set once at boot-time and never mutated at runtime.
You can fetch values of ActionController::Parameters
using
either :key
or "key"
.
params = ActionController::Parameters.new(key: "value") params[:key] # => "value" params["key"] # => "value"
Constants
- EMPTY_ARRAY
- EMPTY_HASH
- PERMITTED_SCALAR_TYPES
This is a white list of permitted scalar types that includes the ones supported in XML and JSON requests.
This list is in particular used to filter ordinary requests, String goes as first element to quickly short-circuit the common case.
If you modify this collection please update the API of
permit
above.
Attributes
Public Class Methods
Returns a new instance of ActionController::Parameters
. Also,
sets the permitted
attribute to the default value of
ActionController::Parameters.permit_all_parameters
.
class Person < ActiveRecord::Base end params = ActionController::Parameters.new(name: "Francesco") params.permitted? # => false Person.new(params) # => ActiveModel::ForbiddenAttributesError ActionController::Parameters.permit_all_parameters = true params = ActionController::Parameters.new(name: "Francesco") params.permitted? # => true Person.new(params) # => #<Person id: nil, name: "Francesco">
# File lib/action_controller/metal/strong_parameters.rb, line 234 def initialize(parameters = {}) @parameters = parameters.with_indifferent_access @permitted = self.class.permit_all_parameters end
Public Instance Methods
Returns true if another Parameters
object contains the same
content and permitted flag.
# File lib/action_controller/metal/strong_parameters.rb, line 241 def ==(other) if other.respond_to?(:permitted?) permitted? == other.permitted? && parameters == other.parameters else @parameters == other end end
Returns a parameter for the given key
. If not found, returns
nil
.
params = ActionController::Parameters.new(person: { name: "Francesco" }) params[:person] # => <ActionController::Parameters {"name"=>"Francesco"} permitted: false> params[:none] # => nil
# File lib/action_controller/metal/strong_parameters.rb, line 552 def [](key) convert_hashes_to_parameters(key, @parameters[key]) end
Assigns a value to a given key
. The given key may still get
filtered out when permit
is called.
# File lib/action_controller/metal/strong_parameters.rb, line 558 def []=(key, value) @parameters[key] = value end
Returns a hash that can be used as the JSON representation for the parameters.
# File lib/action_controller/metal/strong_parameters.rb, line 135
Attribute that keeps track of converted arrays, if any, to avoid double looping in the common use case permit + mass-assignment. Defined in a method to instantiate it only if needed.
Testing membership still loops, but it's going to be faster than our own loop that converts values. Also, we are not going to build a new array object per fetch.
# File lib/action_controller/metal/strong_parameters.rb, line 351 def converted_arrays @converted_arrays ||= Set.new end
Returns duplicate of object including all parameters.
# File lib/action_controller/metal/strong_parameters.rb, line 791 def deep_dup self.class.new(@parameters.deep_dup).tap do |duplicate| duplicate.permitted = @permitted end end
Deletes a key-value pair from Parameters
and returns the
value. If key
is not found, returns nil
(or, with
optional code block, yields key
and returns the result). Cf.
#extract!
, which returns the corresponding
ActionController::Parameters
object.
# File lib/action_controller/metal/strong_parameters.rb, line 684 def delete(key, &block) convert_value_to_parameters(@parameters.delete(key, &block)) end
Extracts the nested parameter from the given keys
by calling
dig
at each step. Returns nil
if any intermediate
step is nil
.
params = ActionController::Parameters.new(foo: { bar: { baz: 1 } }) params.dig(:foo, :bar, :baz) # => 1 params.dig(:foo, :zot, :xyz) # => nil params2 = ActionController::Parameters.new(foo: [10, 11, 12]) params2.dig(:foo, 1) # => 11
# File lib/action_controller/metal/strong_parameters.rb, line 597 def dig(*keys) convert_hashes_to_parameters(keys.first, @parameters[keys.first]) @parameters.dig(*keys) end
Convert all hashes in values into parameters, then yield each pair in the
same way as Hash#each_pair
.
# File lib/action_controller/metal/strong_parameters.rb, line 335 def each_pair(&block) @parameters.each_pair do |key, value| yield [key, convert_hashes_to_parameters(key, value)] end self end
Returns true if the parameters have no key/value pairs.
# File lib/action_controller/metal/strong_parameters.rb, line 143
Returns a new ActionController::Parameters
instance that
filters out the given keys
.
params = ActionController::Parameters.new(a: 1, b: 2, c: 3) params.except(:a, :b) # => <ActionController::Parameters {"c"=>3} permitted: false> params.except(:d) # => <ActionController::Parameters {"a"=>1, "b"=>2, "c"=>3} permitted: false>
# File lib/action_controller/metal/strong_parameters.rb, line 627 def except(*keys) new_instance_with_inherited_permitted_status(@parameters.except(*keys)) end
Removes and returns the key/value pairs matching the given keys.
params = ActionController::Parameters.new(a: 1, b: 2, c: 3) params.extract!(:a, :b) # => <ActionController::Parameters {"a"=>1, "b"=>2} permitted: false> params # => <ActionController::Parameters {"c"=>3} permitted: false>
# File lib/action_controller/metal/strong_parameters.rb, line 636 def extract!(*keys) new_instance_with_inherited_permitted_status(@parameters.extract!(*keys)) end
Returns a parameter for the given key
. If the key
can't be found, there are several options: With no other arguments, it
will raise an ActionController::ParameterMissing
error; if a
second argument is given, then that is returned (converted to an instance
of ActionController::Parameters if possible);
if a block is given, then that will be run and its result returned.
params = ActionController::Parameters.new(person: { name: "Francesco" }) params.fetch(:person) # => <ActionController::Parameters {"name"=>"Francesco"} permitted: false> params.fetch(:none) # => ActionController::ParameterMissing: param is missing or the value is empty: none params.fetch(:none, {}) # => <ActionController::Parameters {} permitted: false> params.fetch(:none, "Francesco") # => "Francesco" params.fetch(:none) { "Francesco" } # => "Francesco"
# File lib/action_controller/metal/strong_parameters.rb, line 575 def fetch(key, *args) convert_value_to_parameters( @parameters.fetch(key) { if block_given? yield else args.fetch(0) { raise ActionController::ParameterMissing.new(key) } end } ) end
Returns true if the given key is present in the parameters.
# File lib/action_controller/metal/strong_parameters.rb, line 151
Returns true if the given value is present for some key in the parameters.
# File lib/action_controller/metal/strong_parameters.rb, line 159
Returns true if the given key is present in the parameters.
# File lib/action_controller/metal/strong_parameters.rb, line 167
# File lib/action_controller/metal/strong_parameters.rb, line 759 def inspect "<#{self.class} #{@parameters} permitted: #{@permitted}>" end
Returns true if the given key is present in the parameters.
# File lib/action_controller/metal/strong_parameters.rb, line 175
Returns a new array of the keys of the parameters.
# File lib/action_controller/metal/strong_parameters.rb, line 183
Returns a new ActionController::Parameters
with all keys from
other_hash
merged into current hash.
# File lib/action_controller/metal/strong_parameters.rb, line 722 def merge(other_hash) new_instance_with_inherited_permitted_status( @parameters.merge(other_hash.to_h) ) end
Returns current ActionController::Parameters
instance with
other_hash
merged into current hash.
# File lib/action_controller/metal/strong_parameters.rb, line 730 def merge!(other_hash) @parameters.merge!(other_hash.to_h) self end
Returns a new ActionController::Parameters
instance that
includes only the given filters
and sets the
permitted
attribute for the object to true
. This
is useful for limiting which attributes should be allowed for mass
updating.
params = ActionController::Parameters.new(user: { name: "Francesco", age: 22, role: "admin" }) permitted = params.require(:user).permit(:name, :age) permitted.permitted? # => true permitted.has_key?(:name) # => true permitted.has_key?(:age) # => true permitted.has_key?(:role) # => false
Only permitted scalars pass the filter. For example, given
params.permit(:name)
:name
passes if it is a key of params
whose
associated value is of type String
, Symbol
,
NilClass
, Numeric
, TrueClass
,
FalseClass
, Date
, Time
,
DateTime
, StringIO
, IO
,
ActionDispatch::Http::UploadedFile
or
Rack::Test::UploadedFile
. Otherwise, the key
:name
is filtered out.
You may declare that the parameter should be an array of permitted scalars by mapping it to an empty array:
params = ActionController::Parameters.new(tags: ["rails", "parameters"]) params.permit(tags: [])
Sometimes it is not possible or convenient to declare the valid keys of a hash parameter or its internal structure. Just map to an empty hash:
params.permit(preferences: {})
Be careful because this opens the door to arbitrary input. In this case,
permit
ensures values in the returned structure are permitted
scalars and filters out anything else.
You can also use permit
on nested parameters, like:
params = ActionController::Parameters.new({ person: { name: "Francesco", age: 22, pets: [{ name: "Purplish", category: "dogs" }] } }) permitted = params.permit(person: [ :name, { pets: :name } ]) permitted.permitted? # => true permitted[:person][:name] # => "Francesco" permitted[:person][:age] # => nil permitted[:person][:pets][0][:name] # => "Purplish" permitted[:person][:pets][0][:category] # => nil
Note that if you use permit
in a key that points to a hash, it
won't allow all the hash. You also need to specify which attributes
inside the hash should be whitelisted.
params = ActionController::Parameters.new({ person: { contact: { email: "none@test.com", phone: "555-1234" } } }) params.require(:person).permit(:contact) # => <ActionController::Parameters {} permitted: true> params.require(:person).permit(contact: :phone) # => <ActionController::Parameters {"contact"=><ActionController::Parameters {"phone"=>"555-1234"} permitted: true>} permitted: true> params.require(:person).permit(contact: [ :email, :phone ]) # => <ActionController::Parameters {"contact"=><ActionController::Parameters {"email"=>"none@test.com", "phone"=>"555-1234"} permitted: true>} permitted: true>
# File lib/action_controller/metal/strong_parameters.rb, line 529 def permit(*filters) params = self.class.new filters.flatten.each do |filter| case filter when Symbol, String permitted_scalar_filter(params, filter) when Hash hash_filter(params, filter) end end unpermitted_parameters!(params) if self.class.action_on_unpermitted_parameters params.permit! end
Sets the permitted
attribute to true
. This can be
used to pass mass assignment. Returns self
.
class Person < ActiveRecord::Base end params = ActionController::Parameters.new(name: "Francesco") params.permitted? # => false Person.new(params) # => ActiveModel::ForbiddenAttributesError params.permit! params.permitted? # => true Person.new(params) # => #<Person id: nil, name: "Francesco">
# File lib/action_controller/metal/strong_parameters.rb, line 377 def permit! each_pair do |key, value| Array.wrap(value).flatten.each do |v| v.permit! if v.respond_to? :permit! end end @permitted = true self end
Returns true
if the parameter is permitted, false
otherwise.
params = ActionController::Parameters.new params.permitted? # => false params.permit! params.permitted? # => true
# File lib/action_controller/metal/strong_parameters.rb, line 361 def permitted? @permitted end
Returns a new instance of ActionController::Parameters
with
items that the block evaluates to true removed.
# File lib/action_controller/metal/strong_parameters.rb, line 703 def reject(&block) new_instance_with_inherited_permitted_status(@parameters.reject(&block)) end
Removes items that the block evaluates to true and returns self.
# File lib/action_controller/metal/strong_parameters.rb, line 708 def reject!(&block) @parameters.reject!(&block) self end
This method accepts both a single key and an array of keys.
When passed a single key, if it exists and its associated value is either
present or the singleton false
, returns said value:
ActionController::Parameters.new(person: { name: "Francesco" }).require(:person) # => <ActionController::Parameters {"name"=>"Francesco"} permitted: false>
Otherwise raises ActionController::ParameterMissing
:
ActionController::Parameters.new.require(:person) # ActionController::ParameterMissing: param is missing or the value is empty: person ActionController::Parameters.new(person: nil).require(:person) # ActionController::ParameterMissing: param is missing or the value is empty: person ActionController::Parameters.new(person: "\t").require(:person) # ActionController::ParameterMissing: param is missing or the value is empty: person ActionController::Parameters.new(person: {}).require(:person) # ActionController::ParameterMissing: param is missing or the value is empty: person
When given an array of keys, the method tries to require each one of them in order. If it succeeds, an array with the respective return values is returned:
params = ActionController::Parameters.new(user: { ... }, profile: { ... }) user_params, profile_params = params.require([:user, :profile])
Otherwise, the method re-raises the first exception found:
params = ActionController::Parameters.new(user: {}, profile: {}) user_params, profile_params = params.require([:user, :profile]) # ActionController::ParameterMissing: param is missing or the value is empty: user
Technically this method can be used to fetch terminal values:
# CAREFUL params = ActionController::Parameters.new(person: { name: "Finn" }) name = params.require(:person).require(:name) # CAREFUL
but take into account that at some point those ones have to be permitted:
def person_params params.require(:person).permit(:name).tap do |person_params| person_params.require(:name) # SAFER end end
for example.
# File lib/action_controller/metal/strong_parameters.rb, line 438 def require(key) return key.map { |k| require(k) } if key.is_a?(Array) value = self[key] if value.present? || value == false value else raise ParameterMissing.new(key) end end
Returns a new ActionController::Parameters
with all keys from
current hash merged into other_hash
.
# File lib/action_controller/metal/strong_parameters.rb, line 737 def reverse_merge(other_hash) new_instance_with_inherited_permitted_status( other_hash.to_h.merge(@parameters) ) end
Returns current ActionController::Parameters
instance with
current hash merged into other_hash
.
# File lib/action_controller/metal/strong_parameters.rb, line 746 def reverse_merge!(other_hash) @parameters.merge!(other_hash.to_h) { |key, left, right| left } self end
Returns a new instance of ActionController::Parameters
with
only items that the block evaluates to true.
# File lib/action_controller/metal/strong_parameters.rb, line 690 def select(&block) new_instance_with_inherited_permitted_status(@parameters.select(&block)) end
Equivalent to Hash#keep_if, but returns nil
if no changes were
made.
# File lib/action_controller/metal/strong_parameters.rb, line 695 def select!(&block) @parameters.select!(&block) self end
Returns a new ActionController::Parameters
instance that
includes only the given keys
. If the given keys
don't exist, returns an empty hash.
params = ActionController::Parameters.new(a: 1, b: 2, c: 3) params.slice(:a, :b) # => <ActionController::Parameters {"a"=>1, "b"=>2} permitted: false> params.slice(:d) # => <ActionController::Parameters {} permitted: false>
# File lib/action_controller/metal/strong_parameters.rb, line 610 def slice(*keys) new_instance_with_inherited_permitted_status(@parameters.slice(*keys)) end
Returns current ActionController::Parameters
instance which
contains only the given keys
.
# File lib/action_controller/metal/strong_parameters.rb, line 616 def slice!(*keys) @parameters.slice!(*keys) self end
Returns a safe ActiveSupport::HashWithIndifferentAccess
representation of the parameters with all unpermitted keys removed.
params = ActionController::Parameters.new({ name: "Senjougahara Hitagi", oddity: "Heavy stone crab" }) params.to_h # => ActionController::UnfilteredParameters: unable to convert unpermitted parameters to hash safe_params = params.permit(:name) safe_params.to_h # => {"name"=>"Senjougahara Hitagi"}
# File lib/action_controller/metal/strong_parameters.rb, line 261 def to_h if permitted? convert_parameters_to_hashes(@parameters, :to_h) else raise UnfilteredParameters end end
Returns a safe Hash
representation of the parameters with all
unpermitted keys removed.
params = ActionController::Parameters.new({ name: "Senjougahara Hitagi", oddity: "Heavy stone crab" }) params.to_hash # => ActionController::UnfilteredParameters: unable to convert unpermitted parameters to hash safe_params = params.permit(:name) safe_params.to_hash # => {"name"=>"Senjougahara Hitagi"}
# File lib/action_controller/metal/strong_parameters.rb, line 281 def to_hash to_h.to_hash end
Returns a string representation of the receiver suitable for use as a URL query string:
params = ActionController::Parameters.new({ name: "David", nationality: "Danish" }) params.to_query # => ActionController::UnfilteredParameters: unable to convert unpermitted parameters to hash safe_params = params.permit(:name, :nationality) safe_params.to_query # => "name=David&nationality=Danish"
An optional namespace can be passed to enclose key names:
params = ActionController::Parameters.new({ name: "David", nationality: "Danish" }) safe_params = params.permit(:name, :nationality) safe_params.to_query("user") # => "user%5Bname%5D=David&user%5Bnationality%5D=Danish"
The string pairs “key=value” that conform the query string are sorted lexicographically in ascending order.
This method is also aliased as to_param
.
# File lib/action_controller/metal/strong_parameters.rb, line 313 def to_query(*args) to_h.to_query(*args) end
Returns the content of the parameters as a string.
# File lib/action_controller/metal/strong_parameters.rb, line 191
Returns an unsafe, unfiltered
ActiveSupport::HashWithIndifferentAccess
representation of the
parameters.
params = ActionController::Parameters.new({ name: "Senjougahara Hitagi", oddity: "Heavy stone crab" }) params.to_unsafe_h # => {"name"=>"Senjougahara Hitagi", "oddity" => "Heavy stone crab"}
# File lib/action_controller/metal/strong_parameters.rb, line 328 def to_unsafe_h convert_parameters_to_hashes(@parameters, :to_unsafe_h) end
Returns a new ActionController::Parameters
instance with the
results of running block
once for every key. The values are
unchanged.
# File lib/action_controller/metal/strong_parameters.rb, line 663 def transform_keys(&block) if block new_instance_with_inherited_permitted_status( @parameters.transform_keys(&block) ) else @parameters.transform_keys end end
Performs keys transformation and returns the altered
ActionController::Parameters
instance.
# File lib/action_controller/metal/strong_parameters.rb, line 675 def transform_keys!(&block) @parameters.transform_keys!(&block) self end
Returns a new ActionController::Parameters
with the results of
running block
once for every value. The keys are unchanged.
params = ActionController::Parameters.new(a: 1, b: 2, c: 3) params.transform_values { |x| x * 2 } # => <ActionController::Parameters {"a"=>2, "b"=>4, "c"=>6} permitted: false>
# File lib/action_controller/metal/strong_parameters.rb, line 646 def transform_values return to_enum(:transform_values) unless block_given? new_instance_with_inherited_permitted_status( @parameters.transform_values { |v| yield convert_value_to_parameters(v) } ) end
Performs values transformation and returns the altered
ActionController::Parameters
instance.
# File lib/action_controller/metal/strong_parameters.rb, line 655 def transform_values! return to_enum(:transform_values!) unless block_given? @parameters.transform_values! { |v| yield convert_value_to_parameters(v) } self end
Returns true if the given value is present for some key in the parameters.
# File lib/action_controller/metal/strong_parameters.rb, line 199
Returns a new array of the values of the parameters.
# File lib/action_controller/metal/strong_parameters.rb, line 206 delegate :keys, :key?, :has_key?, :values, :has_value?, :value?, :empty?, :include?, :as_json, :to_s, to: :@parameters
Returns values that were assigned to the given keys
. Note that
all the Hash
objects will be converted to
ActionController::Parameters
.
# File lib/action_controller/metal/strong_parameters.rb, line 716 def values_at(*keys) convert_value_to_parameters(@parameters.values_at(*keys)) end
Protected Instance Methods
# File lib/action_controller/metal/strong_parameters.rb, line 804 def fields_for_style? @parameters.all? { |k, v| k =~ /\A-?\d+\z/ && (v.is_a?(Hash) || v.is_a?(Parameters)) } end
# File lib/action_controller/metal/strong_parameters.rb, line 800 def permitted=(new_permitted) @permitted = new_permitted end
Private Instance Methods
# File lib/action_controller/metal/strong_parameters.rb, line 925 def array_of_permitted_scalars?(value) if value.is_a?(Array) && value.all? { |element| permitted_scalar?(element) } yield value end end
# File lib/action_controller/metal/strong_parameters.rb, line 830 def convert_hashes_to_parameters(key, value) converted = convert_value_to_parameters(value) @parameters[key] = converted unless converted.equal?(value) converted end
# File lib/action_controller/metal/strong_parameters.rb, line 815 def convert_parameters_to_hashes(value, using) case value when Array value.map { |v| convert_parameters_to_hashes(v, using) } when Hash value.transform_values do |v| convert_parameters_to_hashes(v, using) end.with_indifferent_access when Parameters value.send(using) else value end end
# File lib/action_controller/metal/strong_parameters.rb, line 836 def convert_value_to_parameters(value) case value when Array return value if converted_arrays.member?(value) converted = value.map { |_| convert_value_to_parameters(_) } converted_arrays << converted converted when Hash self.class.new(value) else value end end
# File lib/action_controller/metal/strong_parameters.rb, line 850 def each_element(object) case object when Array object.grep(Parameters).map { |el| yield el }.compact when Parameters if object.fields_for_style? hash = object.class.new object.each { |k, v| hash[k] = yield v } hash else yield object end end end
# File lib/action_controller/metal/strong_parameters.rb, line 937 def hash_filter(params, filter) filter = filter.with_indifferent_access # Slicing filters out non-declared keys. slice(*filter.keys).each do |key, value| next unless value next unless has_key? key if filter[key] == EMPTY_ARRAY # Declaration { comment_ids: [] }. array_of_permitted_scalars?(self[key]) do |val| params[key] = val end elsif filter[key] == EMPTY_HASH # Declaration { preferences: {} }. if value.is_a?(Parameters) params[key] = permit_any_in_parameters(value) end elsif non_scalar?(value) # Declaration { user: :name } or { user: [:name, :age, { address: ... }] }. params[key] = each_element(value) do |element| element.permit(*Array.wrap(filter[key])) end end end end
# File lib/action_controller/metal/strong_parameters.rb, line 996 def initialize_copy(source) super @parameters = @parameters.dup end
# File lib/action_controller/metal/strong_parameters.rb, line 809 def new_instance_with_inherited_permitted_status(hash) self.class.new(hash).tap do |new_instance| new_instance.permitted = @permitted end end
# File lib/action_controller/metal/strong_parameters.rb, line 931 def non_scalar?(value) value.is_a?(Array) || value.is_a?(Parameters) end
# File lib/action_controller/metal/strong_parameters.rb, line 981 def permit_any_in_array(array) [].tap do |sanitized| array.each do |element| case element when ->(e) { permitted_scalar?(e) } sanitized << element when Parameters sanitized << permit_any_in_parameters(element) else # Filter this one out. end end end end
# File lib/action_controller/metal/strong_parameters.rb, line 964 def permit_any_in_parameters(params) self.class.new.tap do |sanitized| params.each do |key, value| case value when ->(v) { permitted_scalar?(v) } sanitized[key] = value when Array sanitized[key] = permit_any_in_array(value) when Parameters sanitized[key] = permit_any_in_parameters(value) else # Filter this one out. end end end end
# File lib/action_controller/metal/strong_parameters.rb, line 909 def permitted_scalar?(value) PERMITTED_SCALAR_TYPES.any? { |type| value.is_a?(type) } end
# File lib/action_controller/metal/strong_parameters.rb, line 913 def permitted_scalar_filter(params, key) if has_key?(key) && permitted_scalar?(self[key]) params[key] = self[key] end keys.grep(/\A#{Regexp.escape(key)}\(\d+[if]?\)\z/) do |k| if permitted_scalar?(self[k]) params[k] = self[k] end end end
# File lib/action_controller/metal/strong_parameters.rb, line 878 def unpermitted_keys(params) keys - params.keys - always_permitted_parameters end
# File lib/action_controller/metal/strong_parameters.rb, line 865 def unpermitted_parameters!(params) unpermitted_keys = unpermitted_keys(params) if unpermitted_keys.any? case self.class.action_on_unpermitted_parameters when :log name = "unpermitted_parameters.action_controller" ActiveSupport::Notifications.instrument(name, keys: unpermitted_keys) when :raise raise ActionController::UnpermittedParameters.new(unpermitted_keys) end end end