diff options
Diffstat (limited to 'actionpack/lib/action_controller/metal/strong_parameters.rb')
| -rw-r--r-- | actionpack/lib/action_controller/metal/strong_parameters.rb | 62 |
1 files changed, 59 insertions, 3 deletions
diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb index 9c82abb640..e14da22e01 100644 --- a/actionpack/lib/action_controller/metal/strong_parameters.rb +++ b/actionpack/lib/action_controller/metal/strong_parameters.rb @@ -334,6 +334,15 @@ module ActionController # 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: {}) + # + # but 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({ @@ -382,14 +391,15 @@ module ActionController case filter when Symbol, String permitted_scalar_filter(params, filter) - when Hash then + when Hash hash_filter(params, filter) end end unpermitted_parameters!(params) if self.class.action_on_unpermitted_parameters - params.permit! + params.permitted = true + params end # Returns a parameter for the given +key+. If not found, @@ -539,7 +549,7 @@ module ActionController new_instance_with_inherited_permitted_status(@parameters.select(&block)) end - # Equivalent to Hash#keep_if, but returns nil if no changes were made. + # Equivalent to Hash#keep_if, but returns +nil+ if no changes were made. def select!(&block) @parameters.select!(&block) self @@ -573,6 +583,13 @@ module ActionController ) end + # Returns current <tt>ActionController::Parameters</tt> instance which + # +other_hash+ merges into current hash. + def merge!(other_hash) + @parameters.merge!(other_hash.to_h) + self + end + # 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. @@ -759,6 +776,7 @@ module ActionController end EMPTY_ARRAY = [] + EMPTY_HASH = {} def hash_filter(params, filter) filter = filter.with_indifferent_access @@ -772,6 +790,11 @@ module ActionController 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| @@ -781,6 +804,39 @@ module ActionController end end + 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 + sanitized.permitted = true + end + end + + 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 + def initialize_copy(source) super @parameters = @parameters.dup |