Unrelated Models: Nested Model attributes not saving to database RAILS 4

Hi, I have been at this for a while. I have a Model form, call it Cover, with a nested Model, call it Logo, where the form accepts attributes for both models. I want to save their respective data to their models upon pressing the ssubmit button, but only the parent data gets saved.

Many online problems have an association of has_many and belongs_to, but this is not the case for these two, a Cover can has_and_belongs_to_many logos and Logo has_and_belongs_to_many covers. I think my problem is in the create method of cover_controllers, I do not know how to access the inner logo hash to save it to the database. Id appreciate tremendously any help!

The parameters lists a logo hash inside the cover hash but I havent been able to access it and pass it so that it can be saved to @logo and into the Logo db

I have tried def create @logo = Logo.new(:logo) @logo = Logo.new(@cover.logo) @logo = Logo.new(logo) @logo = Logo.new(logos_attributes)

UPDATE:

So I was able to use @logo = Logo.new(params[:logo]) and it did not throw an error, BUT the db is saving the data as nill into every attr of logo.

COVER VIEW <%= simple_form_for @cover, html: {class:'f'} do |f| %>

    <div id="cover">
        <%= render "cover", :locals => {:f => f}%>

<%=  f.simple_fields_for @logo do |logopart| %>

        <%= render "logo_fields", :iconpart=> iconpart%>

        <% end %>

COVER CONTROLLER '''def create @cover = Cover.new(cover_params) @logo = Logo.new(WHAT GOES HERE? I have tried params[:id] but Logo hates the attributes of Cover) if @Logo.save and @Cover.save redirect_to Covers_path write_json else render 'new' end ''' ''' def new

@cover = Cover.new
@logo = Logo.new 

end

def cover_params params.require(:cover).permit(:id, :the rest of cover's attr's, logos_attributes:[:id, etc..])

end'''

params {"utf8"=>"✓", "authenticity_token"=>"eEawInQkZwgmtptT+8FnsHw+14QkTS+69nLWReODMPS7axTpWG5yaJ8LJPSZ0/h/theI/ot9MH8nMOl0yNhS7A==", "cover"=>{"name"=>"9", etc. "logo"=>{"type"=>"9", "width"=>"9", "img_url"=>"9", "url"=>"9", "height"=>"9", "alt"=>""}}, "commit"=>"Create Title"}