POST请求和关系上的错误Ruby On Rails

Question

I have a rails project where there is a Customer table and a Ticket table. The relationship is Ticket has_many :customers and Customer belongs_to :ticket.

On my Customer index page I list out all of the customers with create, update, and delete options. All of this works fine. However, what I am wanting to do now is create another button (on the index page for each customer) that when clicked, it creates a Ticket with the customer selected added to the ticket. I currently have the relationships setup in the models. My first idea was to make a add a button for each customer in the table and have that button make a post request to my create function in my Tickets controller like this

post 'tickets', to: 'tickets#create', as: 'create_ticket'

When the ticket function is invoked, I assumed that I would get the customer from the post request, create a new ticket, and somehow make the ticket take ownership of the customer with my relationship. Here is my create function.

def create
    @customer = Customer.find(params.require(:customer))
end

So far I have only been able to get errors like "ActionController::ParameterMissing in TicketsController#create param is missing or the value is empty: customer"

Here is the link in my index.html.erb that is making the post request

<%= link_to "add to tickets", create_ticket_path(c), method: :post %>

Any help would be appreciated! Thanks in advance.

---

I have just recently tried implementing this in a similar way to my edit function.

My link in the index.html.erb is now

<%= link_to "add to tickets", create_ticket_path(c) %>

My route is now

get 'tickets/:id/create', to: 'tickets#create', as: 'create_ticket'

When I click the button this is the url that my browser directs to

http://localhost:3000/tickets/1/create

and my create function in the Tickets controller is now

def create
    @customer = Customer.find(params[:id])
end

This is the error I am now getting:

Template is missing Missing template tickets/create, application/create with {:locale=>[:en], :formats=>[:html], :variants=>[], :handlers=>[:erb, :builder, :raw, :ruby, :coffee, :jbuilder]}. Searched in: * "/vagrant/ServiceManager/app/views" * "/home/vagrant/.rvm/gems/ruby-2.2.1/gems/devise-3.5.2/app/views" Extracted source (around line #46):

def find(*args)
    find_all(*args).first || raise(MissingTemplate.new(self, *args))
end

def find_all(path, prefixes = [], *args)





<% @tickets.each do |t| %>
    <tr>
        <td><%= t.description %></td>
        <td><%= t.customers.name %></td>
    </tr>
<% end %>

Here are my model associations:

class Ticket < ActiveRecord::Base
    has_many :customers
end

class Customer < ActiveRecord::Base
    belongs_to  :ticket
end

Here is the content of the index.html.erb

Description: Name: Customer

The name should be bob. It does the same thing for all customers.

Answer 1

You can do something like:

@ticket = Ticket.new(customers: [@customer])
if @ticket.save
  redirect_to @ticket
else
  render :new # This can be a render or redirect or whatever should happen if it fails
end