Cannot write unknown attribute `scrapbook_entry_id '

Question

Trying to add data to the scrapbook_entries join table that has has_one: scrapbook and has_one: recipe.

: recipe and: notes already exist. I am trying to add them to link them to the scrapbook_entries table.

form_ to add to the scrapbook_entries table:

<%= form_for(@scrapbook_entry, :url => scrapbook_entries_path(params[:id])) do |f| %> <%= render 'shared/error_messages', object: f.object %> <div class="field"> <%=f.select(:scrapbook_id, current_user.scrapbooks.collect {|p| [ p.name, p.id ] }, {prompt: 'Select Scrapbook...'})%> <%= f.hidden_field :recipe_id, :value => @recipe.id %> </div> <%= f.submit "Save", class: "btn btn-large btn-primary" %> <% end %> 

scrapbook_entries_controller:

 def create @recipe = Recipe.find(params[:scrapbook_entry][:recipe_id]) @scrapbook = current_user.scrapbooks.find(params[:scrapbook_entry][:scrapbook_id]) @entry = @scrapbook.scrapbook_entries.build(scrapbook: @scrapbook) if @entry.save flash[:success] = "Added '#{@recipe.name}' to scrapbook '#{@scrapbook.name}'" else flash[:error] = "Could not add to scrapbook" end redirect_to @recipe end 

scrapbook.rb

 has_many :recipes, through: :scrapbook_entries has_many :scrapbook_entries 

recipe.rb

 has_many :scrapbooks, through: :scrapbook_entries 

scrapbook_entry.rb

 has_one :recipe has_one :scrapbook 

When I submit the form to the controller, I get an error message:

 can't write unknown attribute `scrapbook_entry_id' 

Can someone tell me what I am doing wrong?

Update:

schema.rb

  create_table "scrapbook_entries", force: true do |t| t.integer "scrapbook_id" t.integer "recipe_id" t.datetime "created_at" t.datetime "updated_at" t.integer "user_id" end 

Answer 1

Your scrapbook_entr.rb should contain

 belongs_to :recipe belongs_to :scrapbook 

and not has_one!

You always use belongs_to when your table contains a foreign key for another table, which is definitely true in this case!