diff options
Diffstat (limited to 'actionpack/lib/action_controller/metal/strong_parameters.rb')
| -rw-r--r-- | actionpack/lib/action_controller/metal/strong_parameters.rb | 360 |
1 files changed, 267 insertions, 93 deletions
diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb index d304dcf468..a37f08d944 100644 --- a/actionpack/lib/action_controller/metal/strong_parameters.rb +++ b/actionpack/lib/action_controller/metal/strong_parameters.rb @@ -1,5 +1,6 @@ +# frozen_string_literal: true + require "active_support/core_ext/hash/indifferent_access" -require "active_support/core_ext/hash/transform_values" require "active_support/core_ext/array/wrap" require "active_support/core_ext/string/filters" require "active_support/core_ext/object/to_query" @@ -43,9 +44,21 @@ module ActionController end end + # Raised when a Parameters instance is not marked as permitted and + # an operation to transform it to hash is called. + # + # params = ActionController::Parameters.new(a: "123", b: "456") + # params.to_h + # # => ActionController::UnfilteredParameters: unable to convert unpermitted parameters to hash + class UnfilteredParameters < ArgumentError + def initialize # :nodoc: + super("unable to convert unpermitted parameters to hash") + end + end + # == Action Controller \Parameters # - # Allows you to choose which attributes should be whitelisted for mass updating + # Allows you to choose which attributes should be permitted 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 @@ -53,9 +66,9 @@ module ActionController # # params = ActionController::Parameters.new({ # person: { - # name: 'Francesco', + # name: "Francesco", # age: 22, - # role: 'admin' + # role: "admin" # } # }) # @@ -103,17 +116,104 @@ module ActionController # You can fetch values of <tt>ActionController::Parameters</tt> using either # <tt>:key</tt> or <tt>"key"</tt>. # - # params = ActionController::Parameters.new(key: 'value') + # params = ActionController::Parameters.new(key: "value") # params[:key] # => "value" # params["key"] # => "value" class Parameters - cattr_accessor :permit_all_parameters, instance_accessor: false - self.permit_all_parameters = false + cattr_accessor :permit_all_parameters, instance_accessor: false, default: false cattr_accessor :action_on_unpermitted_parameters, instance_accessor: false + ## + # :method: as_json + # + # :call-seq: + # as_json(options=nil) + # + # Returns a hash that can be used as the JSON representation for the parameters. + + ## + # :method: each_key + # + # :call-seq: + # each_key() + # + # Calls block once for each key in the parameters, passing the key. + # If no block is given, an enumerator is returned instead. + + ## + # :method: empty? + # + # :call-seq: + # empty?() + # + # Returns true if the parameters have no key/value pairs. + + ## + # :method: has_key? + # + # :call-seq: + # has_key?(key) + # + # Returns true if the given key is present in the parameters. + + ## + # :method: has_value? + # + # :call-seq: + # has_value?(value) + # + # Returns true if the given value is present for some key in the parameters. + + ## + # :method: include? + # + # :call-seq: + # include?(key) + # + # Returns true if the given key is present in the parameters. + + ## + # :method: key? + # + # :call-seq: + # key?(key) + # + # Returns true if the given key is present in the parameters. + + ## + # :method: keys + # + # :call-seq: + # keys() + # + # Returns a new array of the keys of the parameters. + + ## + # :method: to_s + # + # :call-seq: + # to_s() + # + # Returns the content of the parameters as a string. + + ## + # :method: value? + # + # :call-seq: + # value?(value) + # + # Returns true if the given value is present for some key in the parameters. + + ## + # :method: values + # + # :call-seq: + # values() + # + # Returns a new array of the values of the parameters. delegate :keys, :key?, :has_key?, :values, :has_value?, :value?, :empty?, :include?, - :as_json, to: :@parameters + :as_json, :to_s, :each_key, to: :@parameters # By default, never raise an UnpermittedParameters exception if these # params are present. The default includes both 'controller' and 'action' @@ -122,8 +222,7 @@ module ActionController # config. For instance: # # config.always_permitted_parameters = %w( controller action format ) - cattr_accessor :always_permitted_parameters - self.always_permitted_parameters = %w( controller action ) + cattr_accessor :always_permitted_parameters, default: %w( controller action ) # Returns a new instance of <tt>ActionController::Parameters</tt>. # Also, sets the +permitted+ attribute to the default value of @@ -132,13 +231,13 @@ module ActionController # class Person < ActiveRecord::Base # end # - # params = ActionController::Parameters.new(name: 'Francesco') + # 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 = ActionController::Parameters.new(name: "Francesco") # params.permitted? # => true # Person.new(params) # => #<Person id: nil, name: "Francesco"> def initialize(parameters = {}) @@ -157,13 +256,14 @@ module ActionController end # Returns a safe <tt>ActiveSupport::HashWithIndifferentAccess</tt> - # representation of this parameter with all unpermitted keys removed. + # representation of the parameters with all unpermitted keys removed. # # params = ActionController::Parameters.new({ - # name: 'Senjougahara Hitagi', - # oddity: 'Heavy stone crab' + # name: "Senjougahara Hitagi", + # oddity: "Heavy stone crab" # }) - # params.to_h # => {} + # params.to_h + # # => ActionController::UnfilteredParameters: unable to convert unpermitted parameters to hash # # safe_params = params.permit(:name) # safe_params.to_h # => {"name"=>"Senjougahara Hitagi"} @@ -171,17 +271,66 @@ module ActionController if permitted? convert_parameters_to_hashes(@parameters, :to_h) else - slice(*self.class.always_permitted_parameters).permit!.to_h + raise UnfilteredParameters end end + # Returns a safe <tt>Hash</tt> 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"} + 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+. + def to_query(*args) + to_h.to_query(*args) + end + alias_method :to_param, :to_query + # Returns an unsafe, unfiltered - # <tt>ActiveSupport::HashWithIndifferentAccess</tt> representation of this - # parameter. + # <tt>ActiveSupport::HashWithIndifferentAccess</tt> representation of the + # parameters. # # params = ActionController::Parameters.new({ - # name: 'Senjougahara Hitagi', - # oddity: 'Heavy stone crab' + # name: "Senjougahara Hitagi", + # oddity: "Heavy stone crab" # }) # params.to_unsafe_h # # => {"name"=>"Senjougahara Hitagi", "oddity" => "Heavy stone crab"} @@ -191,10 +340,10 @@ module ActionController alias_method :to_unsafe_hash, :to_unsafe_h # Convert all hashes in values into parameters, then yield each pair in - # the same way as <tt>Hash#each_pair</tt> + # the same way as <tt>Hash#each_pair</tt>. def each_pair(&block) @parameters.each_pair do |key, value| - yield key, convert_hashes_to_parameters(key, value) + yield [key, convert_hashes_to_parameters(key, value)] end end alias_method :each, :each_pair @@ -226,7 +375,7 @@ module ActionController # class Person < ActiveRecord::Base # end # - # params = ActionController::Parameters.new(name: 'Francesco') + # params = ActionController::Parameters.new(name: "Francesco") # params.permitted? # => false # Person.new(params) # => ActiveModel::ForbiddenAttributesError # params.permit! @@ -234,7 +383,7 @@ module ActionController # Person.new(params) # => #<Person id: nil, name: "Francesco"> def permit! each_pair do |key, value| - Array.wrap(value).each do |v| + Array.wrap(value).flatten.each do |v| v.permit! if v.respond_to? :permit! end end @@ -248,7 +397,7 @@ module ActionController # 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.new(person: { name: "Francesco" }).require(:person) # # => <ActionController::Parameters {"name"=>"Francesco"} permitted: false> # # Otherwise raises <tt>ActionController::ParameterMissing</tt>: @@ -281,7 +430,7 @@ module ActionController # Technically this method can be used to fetch terminal values: # # # CAREFUL - # params = ActionController::Parameters.new(person: { name: 'Finn' }) + # 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: @@ -311,7 +460,7 @@ module ActionController # 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' }) + # 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 @@ -331,7 +480,7 @@ module ActionController # 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 = ActionController::Parameters.new(tags: ["rails", "parameters"]) # params.permit(tags: []) # # Sometimes it is not possible or convenient to declare the valid keys of @@ -339,7 +488,7 @@ module ActionController # # params.permit(preferences: {}) # - # but be careful because this opens the door to arbitrary input. In this + # 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. # @@ -347,11 +496,11 @@ module ActionController # # params = ActionController::Parameters.new({ # person: { - # name: 'Francesco', + # name: "Francesco", # age: 22, # pets: [{ - # name: 'Purplish', - # category: 'dogs' + # name: "Purplish", + # category: "dogs" # }] # } # }) @@ -365,13 +514,13 @@ module ActionController # # 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. + # attributes inside the hash should be permitted. # # params = ActionController::Parameters.new({ # person: { # contact: { - # email: 'none@test.com', - # phone: '555-1234' + # email: "none@test.com", + # phone: "555-1234" # } # } # }) @@ -404,7 +553,7 @@ module ActionController # Returns a parameter for the given +key+. If not found, # returns +nil+. # - # params = ActionController::Parameters.new(person: { name: 'Francesco' }) + # params = ActionController::Parameters.new(person: { name: "Francesco" }) # params[:person] # => <ActionController::Parameters {"name"=>"Francesco"} permitted: false> # params[:none] # => nil def [](key) @@ -420,14 +569,16 @@ module ActionController # 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 <tt>ActionController::ParameterMissing</tt> error; - # if more arguments are given, then that will be returned; if a block + # 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 = 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, 'Francesco') # => "Francesco" - # params.fetch(:none) { 'Francesco' } # => "Francesco" + # params.fetch(:none, {}) # => <ActionController::Parameters {} permitted: false> + # params.fetch(:none, "Francesco") # => "Francesco" + # params.fetch(:none) { "Francesco" } # => "Francesco" def fetch(key, *args) convert_value_to_parameters( @parameters.fetch(key) { @@ -440,19 +591,18 @@ module ActionController ) end - if Hash.method_defined?(:dig) - # 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 - def dig(*keys) - convert_value_to_parameters(@parameters.dig(*keys)) - 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 + def dig(*keys) + convert_hashes_to_parameters(keys.first, @parameters[keys.first]) + @parameters.dig(*keys) end # Returns a new <tt>ActionController::Parameters</tt> instance that @@ -498,20 +648,18 @@ module ActionController # 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> - def transform_values(&block) - if block - new_instance_with_inherited_permitted_status( - @parameters.transform_values(&block) - ) - else - @parameters.transform_values - end + 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 # <tt>ActionController::Parameters</tt> instance. - def transform_values!(&block) - @parameters.transform_values!(&block) + def transform_values! + return to_enum(:transform_values!) unless block_given? + @parameters.transform_values! { |v| yield convert_value_to_parameters(v) } self end @@ -534,12 +682,12 @@ module ActionController self end - # Deletes and returns a key-value pair from +Parameters+ whose key is equal - # to key. If the key is not found, returns the default value. If the - # optional code block is given and the key is not found, pass in the key - # and return the result of block. - def delete(key) - convert_value_to_parameters(@parameters.delete(key)) + # 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. + def delete(key, &block) + convert_value_to_parameters(@parameters.delete(key, &block)) end # Returns a new instance of <tt>ActionController::Parameters</tt> with only @@ -575,20 +723,37 @@ module ActionController end # Returns a new <tt>ActionController::Parameters</tt> with all keys from - # +other_hash+ merges into current hash. + # +other_hash+ merged into current hash. def merge(other_hash) new_instance_with_inherited_permitted_status( @parameters.merge(other_hash.to_h) ) end - # Returns current <tt>ActionController::Parameters</tt> instance which - # +other_hash+ merges into current hash. + # Returns current <tt>ActionController::Parameters</tt> instance with + # +other_hash+ merged into current hash. def merge!(other_hash) @parameters.merge!(other_hash.to_h) self end + # Returns a new <tt>ActionController::Parameters</tt> with all keys from + # current hash merged into +other_hash+. + def reverse_merge(other_hash) + new_instance_with_inherited_permitted_status( + other_hash.to_h.merge(@parameters) + ) + end + alias_method :with_defaults, :reverse_merge + + # Returns current <tt>ActionController::Parameters</tt> instance with + # current hash merged into +other_hash+. + def reverse_merge!(other_hash) + @parameters.merge!(other_hash.to_h) { |key, left, right| left } + self + end + alias_method :with_defaults!, :reverse_merge! + # This is required by ActiveModel attribute assignment, so that user can # pass +Parameters+ to a mass assignment methods in a model. It should not # matter as we are using +HashWithIndifferentAccess+ internally. @@ -627,9 +792,7 @@ module ActionController end end - undef_method :to_param - - # Returns duplicate of object including all parameters + # Returns duplicate of object including all parameters. def deep_dup self.class.new(@parameters.deep_dup).tap do |duplicate| duplicate.permitted = @permitted @@ -639,9 +802,7 @@ module ActionController protected attr_reader :parameters - def permitted=(new_permitted) - @permitted = new_permitted - end + attr_writer :permitted def fields_for_style? @parameters.all? { |k, v| k =~ /\A-?\d+\z/ && (v.is_a?(Hash) || v.is_a?(Parameters)) } @@ -752,15 +913,28 @@ module ActionController PERMITTED_SCALAR_TYPES.any? { |type| value.is_a?(type) } end - def permitted_scalar_filter(params, key) - if has_key?(key) && permitted_scalar?(self[key]) - params[key] = self[key] + # Adds existing keys to the params if their values are scalar. + # + # For example: + # + # puts self.keys #=> ["zipcode(90210i)"] + # params = {} + # + # permitted_scalar_filter(params, "zipcode") + # + # puts params.keys # => ["zipcode"] + def permitted_scalar_filter(params, permitted_key) + permitted_key = permitted_key.to_s + + if has_key?(permitted_key) && permitted_scalar?(self[permitted_key]) + params[permitted_key] = self[permitted_key] end - keys.grep(/\A#{Regexp.escape(key)}\(\d+[if]?\)\z/) do |k| - if permitted_scalar?(self[k]) - params[k] = self[k] - end + each_key do |key| + next unless key =~ /\(\d+[if]?\)\z/ + next unless $~.pre_match == permitted_key + + params[key] = self[key] if permitted_scalar?(self[key]) end end @@ -845,11 +1019,11 @@ module ActionController # # It provides an interface for protecting attributes from end-user # assignment. This makes Action Controller parameters forbidden - # to be used in Active Model mass assignment until they have been - # whitelisted. + # to be used in Active Model mass assignment until they have been explicitly + # enumerated. # # In addition, parameters can be marked as required and flow through a - # predefined raise/rescue flow to end up as a 400 Bad Request with no + # predefined raise/rescue flow to end up as a <tt>400 Bad Request</tt> with no # effort. # # class PeopleController < ActionController::Base @@ -862,7 +1036,7 @@ module ActionController # end # # # This will pass with flying colors as long as there's a person key in the - # # parameters, otherwise it'll raise an ActionController::MissingParameter + # # parameters, otherwise it'll raise an ActionController::ParameterMissing # # exception, which will get caught by ActionController::Base and turned # # into a 400 Bad Request reply. # def update @@ -873,7 +1047,7 @@ module ActionController # # private # # Using a private method to encapsulate the permissible parameters is - # # just a good pattern since you'll be able to reuse the same permit + # # a good pattern since you'll be able to reuse the same permit # # list between create and update. Also, you can specialize this method # # with per-user checking of permissible attributes. # def person_params @@ -882,7 +1056,7 @@ module ActionController # end # # In order to use <tt>accepts_nested_attributes_for</tt> with Strong \Parameters, you - # will need to specify which nested attributes should be whitelisted. You might want + # will need to specify which nested attributes should be permitted. You might want # to allow +:id+ and +:_destroy+, see ActiveRecord::NestedAttributes for more information. # # class Person @@ -900,7 +1074,7 @@ module ActionController # private # # def person_params - # # It's mandatory to specify the nested attributes that should be whitelisted. + # # It's mandatory to specify the nested attributes that should be permitted. # # If you use `permit` with just the key that points to the nested attributes hash, # # it will return an empty hash. # params.require(:person).permit(:name, :age, pets_attributes: [ :id, :name, :category ]) |