How to define virtual attribute for date_select drop menu using active model

Question

I am using active model for payment process in my application , but i am not able to add field for credit card expiration date, since it throws error as below undefined method `card_expiration_date(3i)='.

In my model:

class CartServer

  include ActiveModel::Validation

  include ActiveModel::Conversion

  extend ActiveModel::Naming

  attr_accessor :card_expiration_date

In view:

f.date_select(
  :card_expiration_date,
  :add_month_numbers => false,
  :discard_day => true,
  :start_year => (Date.today.year-10),
  :end_year => (Date.today.year+10),
  :order=>[ :month,:year]
)

I'm having the same problem in case you've found a solution. — Matt Huggins, Dec 13 '13 at 23:32
@MattHuggins, I placed the below code in my model. columns_hash["card_expiration_date"] = ActiveRecord::ConnectionAdapters::Column.new("card_expiration_date", nil, "time") Where "card_expiration_date" is my attribute name — loganathan, Dec 16 '13 at 06:59
Thanks! For reference, there is an open issue/pull request on the Rails repo to get this fixed: https://github.com/rails/rails/pull/8189 — Matt Huggins, Dec 16 '13 at 20:29

score 3 · Answer 1 · answered Jun 10 '20 at 16:31

Something like this will work in Rails 6:

class CartServer
  include ActiveModel::Model
  include ActiveModel::Attributes
  include ActiveRecord::AttributeAssignment

  attribute :card_expiration_date, :date
end

There are two things here that are important:

Declaring the attribute with type :date. In an ActiveRecord model this type information comes from the database schema, but since we're using ActiveModel we need to explicitly declare it.
Including ActiveRecord::AttributeAssignment to get support for multi-part parameter assignment. The params from the form will look something like this:
```
{
  "card_expiration_date(1i)" => "2020",
  "card_expiration_date(2i)" => "12",
  "card_expiration_date(3i)" => "31",
}
```
The ActiveModel::AttributeAssignment module we get from ActiveModel::Model doesn't know how to convert this into a date, so we need to pull in the more fully featured ActiveRecord version instead.

score -2 · Answer 2 · answered Mar 27 '15 at 09:48

-2

How to set an attr_accessor date via Rails date_select and have Rails handle the multi-attributes automatically: https://gist.github.com/paulsturgess/5500858

answered Mar 27 '15 at 09:48

Sergei Struk

358
4
12

score -2 · Answer 3 · answered Apr 28 '17 at 03:33

-2

attribute :card_expiration_date, Type::Date.new

answered Apr 28 '17 at 03:33

kuboon

9,557
3
42
32

How to define virtual attribute for date_select drop menu using active model

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