Adding new variables to a model

Hello –

Thanks in advance for putting up with a newbie question:)

I added two columns to my Products model. The db migration completed without error, I added the items to the views, and I tested the expected behavior on the site itself. The properties can be set, stored, and is displayed later. I also put some validation in the model, and the errors display perfectly. So everything is working just as I would expect.

Where I ran into trouble is when I ran the unit tests I have for the products model. I’m getting errors that say the properties are an “undefined method”. Even for test cases that don’t refer to these properties, they are returning the same error. I assume this is from referencing the model. Why does everything work correctly on the site, but the test cases don’t seem to recognize the new properties I’ve added to the model?

Thanks!

Madison

Additional information below:

(note: two new columns are has_case and case_quantity)

Error:

C:\webapp\depot>ruby -I test test/unit/product_test.rb
Loaded suite test/unit/product_test
Started
EEEEEE
Finished in 0.218401 seconds.

  1. Error:
    test_default_case_values(ProductTest):
    NoMethodError: undefined method has_case' for #<Product:0x8c65b60> test/unit/product_test.rb:53:in test_default_case_values’

  2. Error:
    test_if_has_case_must_have_case_quantity(ProductTest):
    ActiveRecord::UnknownAttributeError: unknown attribute: has_case
    test/unit/product_test.rb:58:in new' test/unit/product_test.rb:58:in test_if_has_case_must_have_case_quantity’

  3. Error:
    test_image_url(ProductTest):
    NoMethodError: undefined method case_quantity' for #<Product:0x8c606d0> test/unit/product_test.rb:36:in test_image_url’
    test/unit/product_test.rb:34:in `each’

    test/unit/product_test.rb:34:in `test_image_url’

  4. Error:
    test_invalid_with_empty_attributes(ProductTest):
    NoMethodError: undefined method case_quantity' for #<Product:0x8c5db20> test/unit/product_test.rb:10:in test_invalid_with_empty_attributes’

  5. Error:
    test_positive_price(ProductTest):
    NoMethodError: undefined method case_quantity' for #<Product:0x8c5af10> test/unit/product_test.rb:20:in test_positive_price’

  6. Error:
    test_unique_title(ProductTest):
    NoMethodError: undefined method case_quantity' for #<Product:0x8c57988> test/unit/product_test.rb:47:in test_unique_title’

6 tests, 0 assertions, 0 failures, 6 errors

C:\webapp\depot>

Model:

class Product < ActiveRecord::Base
has_many :orders, :through=> :line_items
has_many :line_items
validates_presence_of :title, :description, :image_url, :price
validates_numericality_of :price, :case_quantity

validate :price_must_be_at_least_a_cent, :if_case_must_have_quantity,
:if_quantity_must_have_case
validates_uniqueness_of :title
validates_format_of :image_url,
:with => %r{.(gif|jpg|png)$}i,

                  :message => 'must be a URL for GIF, JPG ' + 'or PNG image.'

protected
def price_must_be_at_least_a_cent
errors.add(:price, ‘should be at least 0.01’) if price.nil? || price < 0.01
end

def if_case_must_have_quantity
if (has_case == true) && (case_quantity < 1)
errors.add(:case_quantity, ‘: must set case quantity if this product can be sold in cases’)
end

end

def if_quantity_must_have_case
if (has_case == false) && (case_quantity > 0)
errors.add(:case_quantity, ‘: must be 0 if product is not sold in cases’)
end
end

def self.find_products_for_sale
find(:all, :order => “title”)
end
end

DB migration:

class AddCaseAndQuantityToProducts < ActiveRecord::Migration
def self.up
add_column :products, :has_case, :boolean, :default => false
add_column :products, :case_quantity, :integer, :default => 0

end

def self.down
remove_column :products, :has_case
remove_column :products, :case_quantity
end
end

Hello --

Thanks in advance for putting up with a newbie question:)

I added two columns to my Products model. The db migration completed without error, I added the items to the views, and I tested the expected behavior on the site itself. The properties can be set, stored, and is displayed later. I also put some validation in the model, and the errors display perfectly. So everything is working just as I would expect.

Where I ran into trouble is when I ran the unit tests I have for the products model. I'm getting errors that say the properties are an "undefined method". Even for test cases that don't refer to these properties, they are returning the same error. I assume this is from referencing the model. Why does everything work correctly on the site, but the test cases don't seem to recognize the new properties I've added to the model?

Don't you need to setup the test database?

rake db:test:clone # Recreate the test database from the current environment's database schema
rake db:test:clone_structure # Recreate the test databases from the development structure
rake db:test:load # Recreate the test database from the current schema.rb
rake db:test:prepare # Check for pending migrations and load the test schema
rake db:test:purge # Empty the test database

Oh of course!! I can’t believe I forgot that.

Thanks so much!!!