rails 4 strong params + dynamic hstore keys

Question

I'm having a problem overcoming the new strong params requirement in Rails 4 using Hstore and dynamic accessors

I have an Hstore column called :content which I want to use to store content in multiple languages, ie :en, :fr, etc. And I don't know which language upfront to set them in either the model or the controller.

store_accessor :content, [:en, :fr] #+226 random other il8n languages won't work.

How can I override strong params (or allow for dynamic hstore keys) in rails 4 for one column?

  params.require(:article).permit(
    :name, :content,
    :en, :fr #+226 random translations
  )

Short of...

params.require(:article).permit!

which of course does work.

Answer 1

If I understand correctly, you would like to whitelist a hash of dynamic keys. You can use some ruby code as follows to do this:

params.require(:article).permit(:name).tap do |whitelisted|
  whitelisted[:content] = params[:article][:content] 
end

This worked for me, hope it helps!

Answer 2

I'm doing something similar and found this to be a bit cleaner and work well.

Assuming a model called Article you can access your :content indexed stored_attributes like this: Article.stored_attributes[:content]

So your strong params looks like this:

params.require(:article).permit(:name, content: Article.stored_attributes[:content])

Assuming your params are structured like: { article => { name : "", content : [en, fr,..] } }