Question

these are the codes

<p>
<% form_for @movie do |m| %>
<%= m.label :title, 'Title' %>:
<%= m.text_field :title %></br>
<%= m.label :release_year, 'Release Year' %>:
<%= m.select :release_year, (1900..2011) %></br>
</br>

<% Movie.genres.each do |genre| %>
    <%=h genre %>
    <%= check_box_tag :genre, genre %></br>
<% end%>
</br>

<%= m.submit "Save" %>

<% end %>
</p>

and my code in the controller:

def create
@movie = Movie.new(params[:movie].merge(:genre))
if @movie.save!
  render show_path
else
  render new_path
end

But for whatever reason, I keep getting error messages saying “undefined method `each_pair’ for :genre:Symbol” or “cannot find Movie without an ID”. It’s not saving properly.

Is it because of my submit form is only the movie form |m| or is it because my create function in the controller is wrong?

Thanks.

Answer 1

perhaps instead of

params[:movie].merge(:genre)

you wanted to do

params[:movie].merge(:genre => params[:genre])

?