pulling information from specific fields in Rails 4 Form -

i creating blog post versioning system. (i tried paper_trail , draftsman , don't have need). when user edits "live" page, instead of changing live version, app makes postversion table entry new information , calls "pending". however, if user edits "draft" page, no "pending" postversion created, edits page directly.

i can't seem form params pass form postversion.create! method. submits nil values when i'm trying pull form values.

posts_controller.rb

def update   @post = post.find(params[:id])   if @post.status == 'draft'    #this not important   end   if @post.status == 'live'     @pending_post =  postversion.create!(title: params[:title], status:  'pending',  body: params[:body],  post_id:  @post.id )   end end 

_form.html.slim

= simple_form_for [:admin, @post ], multipart: true |f|    = f.error_notification    = f.input :title, label: 'title', required: true, focus: true   #rest of form redacted 

the actual params may nested under "post" array of sorts, such post[title]. might want define specific params method so:

def update   @post = post.find(params[:id])   if @post.status == 'draft'    #this not important   end   if @post.status == 'live'     @pending_post =  postversion.create!(title: post_params[:title], status:  'pending',  body: post_params[:body],  post_id:  @post.id )   end end  private  def post_params   params.require(:post).permit :title, :body end