ruby on rails - Setting hidden field in edit form -


i'm creating posts blogs. here's code create post

= simple_form_for post |f|       = f.error_notification         = f.input :title         = f.input :content         = f.hidden_field :blog_id, value: params[:blog_id]         = f.button :submit

creating works fine, when tried edit created post same form got error. console log:

"post"=>{"title"=>"xzcascdasd", "content"=>"", "blog_id"=>""}, "commit"=>"update post", "id"=>"2"}

should set here blog_id? doesnt work without blog_id too. ideas?

= f.hidden_field :blog_id, value: params[:blog_id]  params[:blog_id] existing on page ??

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