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-rw-r--r--actionpack/CHANGELOG.md6
-rw-r--r--actionpack/lib/action_controller/metal/strong_parameters.rb6
-rw-r--r--actionpack/test/controller/parameters/nested_parameters_test.rb15
3 files changed, 26 insertions, 1 deletions
diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index b0b75f6909..a11cd0b553 100644
--- a/actionpack/CHANGELOG.md
+++ b/actionpack/CHANGELOG.md
@@ -1,3 +1,9 @@
+* Strong parameters should permit nested number as key.
+
+ Fixes #12293
+
+ *kennyj*
+
* Fix regex used to detect URI schemes in `redirect_to` to be consistent with
RFC 3986.
diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb
index b495ab3f0f..66403d533c 100644
--- a/actionpack/lib/action_controller/metal/strong_parameters.rb
+++ b/actionpack/lib/action_controller/metal/strong_parameters.rb
@@ -334,7 +334,7 @@ module ActionController
def each_element(object)
if object.is_a?(Array)
object.map { |el| yield el }.compact
- elsif object.is_a?(Hash) && object.keys.all? { |k| k =~ /\A-?\d+\z/ }
+ elsif fields_for_style?(object)
hash = object.class.new
object.each { |k,v| hash[k] = yield v }
hash
@@ -343,6 +343,10 @@ module ActionController
end
end
+ def fields_for_style?(object)
+ object.is_a?(Hash) && object.all? { |k, v| k =~ /\A-?\d+\z/ && v.is_a?(Hash) }
+ end
+
def unpermitted_parameters!(params)
unpermitted_keys = unpermitted_keys(params)
if unpermitted_keys.any?
diff --git a/actionpack/test/controller/parameters/nested_parameters_test.rb b/actionpack/test/controller/parameters/nested_parameters_test.rb
index 91df527dec..3b1257e8d5 100644
--- a/actionpack/test/controller/parameters/nested_parameters_test.rb
+++ b/actionpack/test/controller/parameters/nested_parameters_test.rb
@@ -169,4 +169,19 @@ class NestedParametersTest < ActiveSupport::TestCase
assert_filtered_out permitted[:book][:authors_attributes]['-1'], :age_of_death
end
+
+ test "nested number as key" do
+ params = ActionController::Parameters.new({
+ product: {
+ properties: {
+ '0' => "prop0",
+ '1' => "prop1"
+ }
+ }
+ })
+ params = params.require(:product).permit(:properties => ["0"])
+ assert_not_nil params[:properties]["0"]
+ assert_nil params[:properties]["1"]
+ assert_equal "prop0", params[:properties]["0"]
+ end
end