collection_select content is not showing - ruby-on-rails

Question

I'm currently trying to display the organization which a content identifies themselves with via a collection_select form.
The issue is that after creating a new contact and choosing an organization. The organization doesn't display.
I have tried searching the web for an answer so far but nothing has helped. I have also tried everything that I can think of is the issue with my code.
Here are my models:
class Contact < ApplicationRecord
has_many :contact_orgs
has_many :organizations, through: :contact_orgs
accepts_nested_attributes_for :organizations
end
class Organization < ApplicationRecord
has_many :contact_orgs
has_many :contacts, through: :contact_orgs
end
class ContactOrg < ApplicationRecord
belongs_to :contact
belongs_to :organization
accepts_nested_attributes_for :organization
end
Here is my schema.rb:
create_table "contact_orgs", force: :cascade do |t|
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "contact_id"
t.integer "organization_id"
t.index ["contact_id"], name: "index_contact_orgs_on_contact_id"
t.index ["organization_id"], name: "index_contact_orgs_on_organization_id"
end
create_table "contacts", force: :cascade do |t|
t.string "first_name"
t.string "last_name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "organizations", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "industry"
end
Here is my contact_controller.rb:
private
def contact_params
params.require(:contact).permit(:first_name, :last_name,
organizations_attributes: [:name, :industry])
end
def new
#contact = Contact.new
end
def show
#contact = Contact.find(params[:id])
end
def create
#contact = Contact.new(contact_params)
if #contact.save
redirect_to #contact
else
render 'new'
end
end
Here is my contact/new.html.erb:
<%= form_with scope: :contact, url: contact_path, local: true do |form| %>
<p>
<%= form.label :first_name %><br>
<%= form.text_field :first_name %>
</p>
<p>
<%= form.label :last_name %><br>
<%= form.text_field :last_name %>
</p>
<p>
<%= form.label :organization_id, "Organization:" %><br>
<%= form.collection_select :organization_id, Organization.order(:name), :id, :name, {}, {multiple: true} %>
</p>
<p>
<%= form.submit %>
</p>
<% end %>
Here is my contact/show.html.erb:
<p>
<strong>First name:</strong>
<%= #contact.first_name %>
</p>
<p>
<strong>Last Name:</strong>
<%= #contact.last_name %>
</p>
<hr>
<p>
<strong>Organizations:</strong>
<ul>
<% #contact.organizations.each do |organization| %>
<li><%= organization.name %></li>
<% end %>
</ul>
</p>
Here is what my Rails Server is saying when I refresh my localhost:3000/contact/2 page.
Here is what is in my Rails Console:
2.4.1 :001 > Contact.find(2).organizations
Contact Load (0.2ms) SELECT "contacts".* FROM "contacts" WHERE "contacts"."id" = ? LIMIT ? [["id", 2], ["LIMIT", 1]]
Organization Load (0.2ms) SELECT "organizations".* FROM "organizations" INNER JOIN "contact_orgs" ON "organizations"."id" = "contact_orgs"."organization_id" WHERE "contact_orgs"."contact_id" = ? LIMIT ? [["contact_id", 2], ["LIMIT", 11]]=> #<ActiveRecord::Associations::CollectionProxy []>
Here is my routes.rb file:
Rails.application.routes.draw do
get 'welcome/index'
resources :contacts, :organizations
root 'welcome#index'
end
Thank you ahead of time :)
Edit:
Added Contacts#Show method and Contact.find(2).organization via Rails c command.
Added routes.rb

Answer 1

Since you’re using a joins table (ContactOrg) you really are trying to create a new ContactOrg record when you create a Contact, not assign it to Organization, which is how your code reads.
EDIT
While my first statement above still has a (little) bit of merit (you are in fact creating a joins record), you can definitely let rails help you out and you were pretty close in your original answer. Here's code only where there are updates, I tried to highlight changes.
app/models/contact.rb
class Contact < ApplicationRecord
has_many :contact_orgs
has_many :organizations, through: :contact_orgs
accepts_nested_attributes_for :organizations # you were correct here
end
app/views/contact/new.html.erb
<%= form_with model: :contact, local: true do |form| %>
# use :model here so you can ultimately use this form for both new and edit.
# The model method will infer the correct path
... contact fields here as you have them ...
<p>
<%= form.collection_select :organization_ids, Organization.order(:name), :id, :name, {}, {multiple: true} %>
# the attribute for organization_id should be plural because you're accepting multiple
<p>
<p>
<%= form.submit %>
</p>
<% end %>
app/controllers/contacts_controller.rb
class ContactsController < ApplicationController
... new, show, and create as you have them ...
private # private methods should go after all public methods
def contact_params
params.require(:contact).permit(:first_name, :last_name, organization_ids: [])
# again, the attribute you're passing in is called organization_ids, and you give it an empty array
end
end

Answer 2

Your contract_controller do not initialize #contact used in show.html.erb because there isn't any show method does it that.
Try to add in contact_controller
def show
#contact = Contact.find(param[:id])
end
PS: when you call show method be sure to pass to it a contact.id
I hope this help you.

Answer 3

There are two problems:
You are not able to save the organizations to your contract.
You can check in your rails c by Contact.find(2).organizations.
We never use to write new and create in the private method.
Your private method should not contain any of the curd.
In your app/controllers/contacts_controller.rb
private
def contact_params
params.require(:contact).permit(
:first_name,
:last_name,
organizations_attributes: [
:name,
:industry
]
)
end
In your app/views/contact/new.html.erb
<%= form_with scope: :contact, url: contact_index_path, local: true do |form| %>
<p>
<%= form.label :first_name %><br>
<%= form.text_field :first_name %>
</p>
<p>
<%= form.label :last_name %><br>
<%= form.text_field :last_name %>
</p>
<p>
<%= form.fields_for :organizations do |o| %>
<%= o.label :organization %><br>
<%= o.collection_select(:organization_id, Organization.all,
:id, :org_name,
{:prompt => 'Please select the organization'}) %>
</p>
<p>
<%= form.submit %>
</p>
<% end %>