Geek Answers Handbook

Use accepts_nested_attributes_for to create new records or update existing ones

Read the great update for the latest information.

Hello everybody,

I have a many-to-many relationship in a rails application that includes three tables: a user table, an interest table, and a join user_interests table, which also has a rating value, so the user can rate each of their interests on a scale of 1- 10.

Basically, I am looking for a way for a new user to create their rating when they subscribe and edit them in the future, as well as any information about their profile at the same time.

I tried to execute this question Rails nested form with has_many: through how to edit the attributes of the join model? , but the problem I am facing is trying to enable select a list in the mix and have several interests to evaluate for the user.

Model Code:

user.rb
has_many :user_interests, :dependent => :destroy
has_many :interests, :through => :user_interests, :foreign_key => :user_id  
accepts_nested_attributes_for :user_interests

interest.rb
has_many :user_interests, :dependent => :destroy
has_many :users, :through => :user_interests, :foreign_key => :interest_id, :dependent => :destroy

user_interest.rb
belongs_to :user
belongs_to :interest

View code:

app/views/user/_form.html.erb
<%= form_for(@user) do |form| %>
  ... user fields
  <%= form.fields_for :user_interests do |ui_form| %>
    ... loop through ALL interests
    <% Interest.all.each do |interest| %>
      <%= ui_form.select :rating, options_for_select(1..10) %>
      <%= ui_form.hidden_field :interest_id, :value => interest.id %>
    <% end %>
  <% end %>
<% end %>

I also included the following in new actions / editing in my controller @user.interests.build.build_interest

The problem I am facing is that in the params hash only one percentage rating is passed when I want to have several. I also get an exception thrown by rails

Interest(#2172840620) expected, got Array(#2148226700)

What tiny detail did I miss or am I mistaken that causes the problem?

EDIT:

, HTML - : name user[user_interests_attributes][rating], user[user_interests_attributes][][rating], . : , . , , , , ?

BIG Update:

, , :

:

<% form.fields_for :user_interests do |ui_form| %>
<p>
    <%= ui_form.select :rating, options_for_select(1..5), :selected => :rating %>
    <%= ui_form.label :interest_title %>
    <%= ui_form.hidden_field :interest_id %>
</p>
<% end %>

:

def new
  @user = User.new
  Interest.all.each { |int| @user.user_interests.build({ :interest_id => int.id }) }
end

def edit
  @user = @current_user
  Interest.unrated_by_user_id(@user.id).each { |int| @user.user_interests.build({ :interest_id => int.id }) }
end

user_interests, , , , . , , , . - ?

+4
1

@user.interests.build, has_many. build_interest - has_one/_.

fields_for :user_interests User, user_interest -, /. - user_interests, user_interest_attributes, user_interests . user_interests, user_interests, , .

select, - . user_interests 1 10. , , user_interest, user_interests .

:multiple => true - select , , , . , , .

, , _ accepts_nested_attributes_for has_many :through:

<%= form_for(@user) do |f| %>
  <% f.fields_for :interest_ids  do |interest| %>
    <ul>
      <% Interest.all.each do |choice,i| %>
      <li class="selection">
        <%= interest.check_box [], { :checked => f.object.user_interest_ids.include?(choice.id) }, choice.id, ''  %>
        <%= interest.label [], choice.name %>
      </li>
    <% end %>
    </ul>
  <% end %>
<% end %>
+3

More articles:


All Articles