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POIs it possible to interact with a join table, with a form's create action?
 

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  1. POIs it possible to interact with a join table, with a form's create action?
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    <p>*Note to view all code, follow the link</p> <p>I am creating new "accounts". Each new Account have_many :users. <strong>Users have_and_belong_to_many roles</strong>. I am trying to assign EXISTING roles to new users, in the new account form. Typically an easy process however... </p> <p>The have_and_belong_to_many association between Users and Roles implies that users and roles are associated by a join table. I don't have a model to work with. So I am not sure how to go about coding this. I'm able to create new Roles, using methods outlined <a href="https://stackoverflow.com/questions/2258797/complex-forms-managing-multiple-models-in-a-single-form-3rd-degree-madness">here</a> (in the answer) but I am clueless as to assign existing Roles to new users through the account model.</p> <p>The SQl equivalent would be something like this: <code>SQL (0.1ms) INSERT INTO "roles_users" ("role_id", "user_id") VALUES (6, 29)</code>Where I need 29 to function like the ID of the new user created in rails i.e. VAULES (6, ID)</p> <p>Current Code: (creates a new role)</p> <pre><code>&lt;% f.fields_for :users do |builder| %&gt; &lt;%= render 'user_fields', :f =&gt; builder %&gt; &lt;p&gt;Login : &lt;%= f.text_field :login %&gt; &lt;p&gt;Email : &lt;%= f.text_field :email %&gt; &lt;p&gt;Password : &lt;%= f.password_field :password %&gt; &lt;p&gt;Confirm Password : &lt;%= f.password_field :password_confirmation %&gt; &lt;%= f.hidden_field :account_id, :value =&gt; :id %&gt; &lt;% f.fields_for :roles do |builder| %&gt; &lt;%= builder.hidden_field :name, :value =&gt; 'test' %&gt; &lt;% end %&gt; </code></pre> <p>Account.rb</p> <pre><code>has_many :users accepts_nested_attributes_for :users </code></pre> <p>User.rb</p> <pre><code>has_and_belongs_to_many :roles accepts_nested_attributes_for :roles </code></pre> <p>accounts_controller.rb</p> <pre><code>def new @account = Account.new #builds user and roles in memory 1.times do user = @account.users.build 1.times { user.roles.build } end </code></pre>
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