CODEWITHSUNDEEP
ruby-on-rails
Mike
Mike

Reputation: 67

How to use params in another action?

Im trying to do a little Restaurant-Website in Ruby on Rails(v. 3.2.13).

I made 3 tables: Customer(Name,Email), Reservation(customer_id,table_id), Table(seats,area).

My Models look like this.

class Reservation < ActiveRecord::Base   
  belongs_to :customer  
  belongs_to :table 
end

class Customer < ActiveRecord::Base   
  has_many :reservations  
  has_many :tables, :through => :reservations 
end

class Table < ActiveRecord::Base   
  has_many :reservations   
  has_many :customers, :through => :reservations 
end

I made a form for searching a suitable table. If the customer finds his table, he clicks a button to book it. This button leads to the "add a new customer" view. The button looks like this:

<%= button_to "Book table #{table.id}" , customers_path(:table_id => table) %>

In the CustomerController, I edited the create method like the following:

def create
  @customer = Customer.new(params[:customer])
  table = Table.find(params[:table_id])

  respond_to do |format|
    if @customer.save
      format.html { redirect_to @customer, notice: 'Customer was successfully created.' }
      format.json { render json: @customer, status: :created, location: @customer }
  @reservation = @customer.reservations.build(table: table).save!
    else
      format.html { render action: "new" }
      format.json { render json: @customer.errors, status: :unprocessable_entity }
    end
  end
end

Sadly the "Table.find" does not work. When I use "Table.first" a Reservation is added, but when I use table like above I get the message: "Couldn't find Table with id=". I can, however, display the ID on the NewCustomer view.

Why is the ID not available in the create method?

EDIT:

Here is the form of the mainpage to search a table. Furthermore I have to say that i made a new resource mainpage for the table-search.

<%= form_tag mainpages_path, :method => 'get' do  %>
<p>
  How many persons: <br/><%= number_field_tag(:search) %> <br/>
  Date: <%= date_select :date, 'Date', use_short_month: true, order: [:day, :month, :year] %> <br/>
  Beginn: <%= time_select :Beginn, 'Beginn' , default:Time.now %>  <br/>
  End  : <%= time_select :Ende, 'Ende' , default: Time.now + 2.hours  %>  <br/>
  <%params[:search]%>
  <%= submit_tag "Search" %>
</p>
<% end %>

<% if @tables %>
<h2>Folgende Tische stehen zur Auswahl</h1>
<% @tables.each do |table| %>
    <div class="entry" >
      <h3>Seats: <%= table.seats %></h3>
      <h3>Area: <%= table.area %></h3>
      <%= link_to "Book this table #{table.id}" , new_customer_path(:table_id => table) %>
    </div>
<% end %>
<% else %>
<p> Pls choose a table</p>
<% end %>

EDIT2: The link to HTML-Code:

<a href="/customers/new?table_id=1" mode="post">Book this table 1</a>

And here is the HTML-Code of the customer/new-view:

<!DOCTYPE html>
<html>
<head>
<title>Restaurant</title>
<link href="/assets/application.css?body=1" media="all" rel="stylesheet" type="text/css" />
<link href="/assets/customers.css?body=1" media="all" rel="stylesheet" type="text/css" />
<link href="/assets/mainpages.css?body=1" media="all" rel="stylesheet" type="text/css" />
<link href="/assets/reservations.css?body=1" media="all" rel="stylesheet" type="text/css" />
<link href="/assets/scaffolds.css?body=1" media="all" rel="stylesheet" type="text/css" />
<link href="/assets/tables.css?body=1" media="all" rel="stylesheet" type="text/css" />
<script src="/assets/jquery.js?body=1" type="text/javascript"></script>
<script src="/assets/jquery_ujs.js?body=1" type="text/javascript"></script>
<script src="/assets/customers.js?body=1" type="text/javascript"></script>
<script src="/assets/mainpages.js?body=1" type="text/javascript"></script>
<script src="/assets/reservations.js?body=1" type="text/javascript"></script>
<script src="/assets/tables.js?body=1" type="text/javascript"></script>
<script src="/assets/application.js?body=1" type="text/javascript"></script>
<meta content="authenticity_token" name="csrf-param" />
<meta content="ej1MgV2fad014SLkCv3dZXl8TknQH4JHZLoe56Xn/Kk=" name="csrf-token" />
</head>
<body>

<h1>New customer</h1>

<form accept-charset="UTF-8" action="/customers" class="new_customer" id="new_customer"   method="post"><div style="margin:0;padding:0;display:inline"><input name="utf8" type="hidden" value="&#x2713;" /><input name="authenticity_token" type="hidden" value="ej1MgV2fad014SLkCv3dZXl8TknQH4JHZLoe56Xn/Kk=" /></div>
<div class="field">
<label for="customer_name">Name</label><br />
<input id="customer_name" name="customer[name]" size="30" type="text" />
</div>
<div class="field">
<label for="customer_email">Email</label><br />
<input id="customer_email" name="customer[email]" size="30" type="text" />
</div>


<input id="table_id" name="table_id" type="hidden" />


<div class="actions">
<input name="commit" type="submit" value="Create Customer" />
</div>
</form>
<a href="/customers">Back</a>
</body>
</html>

Upvotes: 0

Views: 277

Answers (5)

Mike
Mike

Reputation: 67

Hello after 1 million tries I found the mistake! The solution with the hidden_field_tag was partly correct. All the time I tried <%= hidden_field_tag :table_id %> . But with this code the create action knows the variable :table_id but it has an empty string. Now I added params[:table_id] to the hidden_field and now the value of the variable :table_id is availlable.

Long story made short, variable name AND value have to be in the hidden_field_tag!

<%= hidden_field_tag :table_id, params[:table_id] %>

Thanks to everyone who tried helping me!

Upvotes: 0

Nick
Nick

Reputation: 290

Based on your last bit of code you posted, you need to have:

<%= link_to "Book this table #{table.id}" , customer_path(:table_id => table), mode: :post %>

Upvotes: 0

Adrian CB
Adrian CB

Reputation: 671

The problem here is the use of button_to...

From the Url Helpers documentation: Generates a form containing a single button that submits to the URL created by the set of options.

The action attribute of the form needs to look similar to this:

/customers/new?table_id=<table_id>

When you click this button it should route to the Customer new action that renders the new view. You need to pass table_id to the new view and then add it to your Customer form. Something like this:

def new
  ...
  @table_id = params[:table_id]
end

Then, when you submit the Customer form - which will route to the create action, you should have access to params[:table_id]

Upvotes: 0

Sachin Singh
Sachin Singh

Reputation: 7225

try this out

<%= button_to "Book table #{table.id}" , customers_path(:table_id => table), method: :post %>

Upvotes: 1

Navin Nair Kottayil
Navin Nair Kottayil

Reputation: 563

change in the controller (just add an@ symbol)

@table = Table.find(params[:table_id])

in view

<%= button_to "Book table #{table.id}" , customers_path(:table_id => @table) %>

Upvotes: 1

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