简单形式的宝石-如何在关联中显示模型的名称-Rails 4

Question

I'm new to rails & I know this may be a very simple question, but I'm unsure how to display the name of a company using 'simple form' association?

• In my schema I've a table companies with the columns name & content
• In my schema I also have a table users with the columns first name , last name & company_id:integer
• A company has_many :users
• A user belongs_to :company

Everything works perfectly in my views expect the display of the name of my company

in my views:

<h2>Sign up Primary Admin</h2>

<%= simple_form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f| %>
  <%= f.error_notification %>

  <div class="form-inputs">
    <%= f.association :company, collection: Company.all.order(:name), prompt: "please select your company", label: 'Company' %>
    <%= f.input :firstname, required: true, autofocus: true %>
    <%= f.input :lastname, required: true, autofocus: true %>
    <%= f.input :email, required: true, autofocus: true %>
    <%= f.input :password, required: true, hint: ("#{@minimum_password_length} characters minimum" if @minimum_password_length) %>
    <%= f.input :password_confirmation, required: true %>
  </div>

  <div class="form-actions">
    <%= f.button :submit, "Sign up" %>
  </div>
<% end %>

<%= render "users/shared/links" %>

i get the below display:

Answer 1

label_method => the label method to be applied to the collection to retrieve the label (use this instead of the text_method option in collection_select)

You should define the label_method to name to display the company names.

<%= f.association :company, collection: Company.all.order(:name), prompt: "please select your company", label_method: :name, label: 'Company' %>

Answer 2

SimpleForm uses to_s method for association labels, so you have to define your own to_s method for your company model. i. e:

class Company < ActiveRecord::Base
  def to_s
    name
  end 
end