Why won't my has_one relationship work - ruby-on-rails

Question

I have a few models Score ScoreAuthority ScoreColor and ScoreType. Score has_one authority, color, and type. Authority, color, and type each belong_to score. I am having trouble creating the form for Score.
I want users to create this relationship from Scores and everyone seems to handle only the reverse scenario creating from authorities, colors, types forms. What I mean specifically is for example:
Authorities
- foo
- bar
Colors
- red
- blue
I want the use to go into Score, chose to create a new score and then select foo from the drop down list, blue from the colors list, enter a score and submit. Authorities, colors and types will not change much and it would make any sense for the user to select Score from each of those.
When I currently do that I get the following error:
ScoreAuthority(#2248480380) expected, got String(#2155957040)
score/_form.html.erb
<%= form_for #score, :html => { :class => 'form-horizontal' } do |f| %>
<div class="control-group">
<%= f.label :product_id, "Products", :class => 'control-label' %>
<div class="controls">
<%= f.collection_select(:product_id, Product.order(:name), :id, :name) %>
</div>
</div>
<div class="control-group">
<%= f.label :score_authority, "Score Authority", :class => 'control-label' %>
<div class="controls">
<%= f.collection_select :score_authority, ScoreAuthority.order(:name), :id, :name, {}, {:class=>'chosen'} %>
</div>
</div>
<div class="control-group">
<%= f.label :score_type, "Score Types", :class => 'control-label' %>
<div class="controls">
<%#= f.collection_select(:score_type, ScoreType.order(:name), :id, :name) %>
<%= f.collection_select :score_type, ScoreType.order(:name), :id, :name, {}, {:class=>'chosen'} %>
</div>
</div>
<div class="control-group">
<%= f.label :score_color, "Score Types", :class => 'control-label' %>
<div class="controls">
<%= f.collection_select :score_color, ScoreColor.order(:name), :id, :name, {}, {:class=>'chosen'} %>
</div>
</div>
<div class="control-group">
<%= f.label :notation, :class => 'control-label' %>
<div class="controls">
<%= f.text_field :notation, :class => 'text_field' %>
</div>
</div>
<div class="control-group">
<%= f.label :value, :class => 'control-label' %>
<div class="controls">
<%= f.text_field :value, :class => 'text_field' %>
</div>
</div>
<div class="form-actions">
<%= f.submit nil, :class => 'btn btn-primary' %>
<%= link_to t('.cancel', :default => t("helpers.links.cancel")),
scores_path, :class => 'btn' %>
</div>
<% end %>
score_authorities, score_colors, score_types tables all have score_id as a column. Each of these models also has belongs_to :score.
The score model
has_one :score_authority
has_one :score_type
has_one :score_color
Not sure what I am doing wrong here, any help would be appreciated. Thanks!

Answer 1

you should use :score_authority_id instead of :score_authority in form
<%= f.collection_select :score_authority_id, ScoreAuthority.order(:name), :id, :name, {}, {:class=>'chosen'} %>
<%= f.collection_select :score_color_id, ScoreColor.order(:name), :id, :name, {}, {:class=>'chosen'} %>
<%= f.collection_select :score_color_id, ScoreColor.order(:name), :id, :name, {}, {:class=>'chosen'} %>
see this How do I create the view for the has_one association? for more detail
or you can try
class Score
has_one :score_authority
accepts_nested_attributes_for :score_authority
end
<%= form_for #score ... do |f| %>
...
<%= f.fields_for :score_authority do |b| %>
<%= b.collection_select :id, ScoreAuthority.all, :id, :name %>
...
<% end %>
...
<% end %>