form.select undefined method

rubyonrails-talk
1

Hello to all! I'm new on this forum, and i'm getting started in Ruby on Rails 2.0. I'm following the tutorial on AWDWR, and i found this error i can't solve: I've this code for a type="select" field in a form wrapped in the form_for helper. In the Order model i've the definition of PAYMENT_TYPES:

form.select :pay_type,              Order::PAYMENT_TYPES,              :prompt => "Select a payment method"

then, when i run my page, it shows this error message:

Showing store/checkout.html.erb where line #20 raised:

undefined method `paytype' for #<Order:0x34ba82c>

Extracted source (around line #20):

17: </p> 18: <p> 19: <label for="order_pay_type" >Pay with:</label> 20: <%= form.select :paytype, 21: Order::PAYMENT_TYPES, 22: :prompt => "Select a payment method" %> 23: </p>

then, if i define a method called pay_type in the Order model, it works, but i feel like there's something wrong because in the tutorial it never mentions to use this "pay_type" method. Then, when i implement other functions involving this form, it shows many times this error about "undefined method 'pay_types'", also if it's declared...

2

Does your order has a field called pay_type or paytype ? The first parameter to form.select should match that.

Fred

3

Does your order has a field called pay_type or paytype ? The first parameter to form.select should match that.

Fred

No, i followed the tutorial and it never create a field called pay_type in the Order model...i show you the Order model in the book:

class Order < ActiveRecord::Base has_many :line_items PAYMENT_TYPES = [ # Displayed stored in db [ "Check" , "check" ], [ "Credit card" , "cc" ], [ "Purchase order" , "po" ] ] # ... validates_presence_of :name, :address, :email, :pay_type validates_inclusion_of :pay_type, :in => PAYMENT_TYPES.map {|disp, value> value} # ... def add_line_items_from_cart(cart) cart.items.each do |item| li = LineItem.from_cart_item(item) line_items << li end end

The only things that match with pay_type is a filed in the table orders in the DB

4

Does your order has a field called pay_type or paytype ? The first parameter to form.select should match that.

Fred

No, i followed the tutorial and it never create a field called
pay_type in the Order model...i show you the Order model in the book:

You say below that you've got one in the orders table. that's the same
thing.

Fred

5

Emanuele,

I'm looking at AWDwRoR 2nd Ed. on page 131 (printed version), and at the top of the next page, you do create a pay_type column in the orders table (after running the migration).

If you're using form_for, your form objects must map to a model. That's why you got the error before you had a pay_type column in your orders table. You shouldn't have to specifically define pay_type in the model if it's in the database.

PAYMENT_TYPES should be defined in the order model as an array of arrays:

PAYMENT_TYPES = [ ["Check", "check"], ["Credit Card", "cc"], ["Purchase Order", "po"]]

These are merely drawn upon as the options for select - the first value is displayed in the form, and the second value is stored in the database. Do not confuse this with the pay_type column in the database.

Also, as Fred pointed out, make sure that you're consistent in your use of pay_type, not paytype or pay_types. You'll definitely get errors if they don't all match.

-Kyle