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-rw-r--r--guides/source/action_controller_overview.md4
1 files changed, 1 insertions, 3 deletions
diff --git a/guides/source/action_controller_overview.md b/guides/source/action_controller_overview.md
index cd4a1a0792..82a23b3dc0 100644
--- a/guides/source/action_controller_overview.md
+++ b/guides/source/action_controller_overview.md
@@ -328,9 +328,7 @@ the job done:
```ruby
def product_params
- params.require(:product).permit(:name).tap do |whitelisted|
- whitelisted[:data] = params[:product][:data]
- end
+ params.require(:product).permit(:name, { data: params[:product][:data].try(:keys) })
end
```