Lazy Attribute

This gem provides a simple and extremely flexible way to use most frequent find_by query in a model. You can minimize find_by query of a particular attribute in a model using lazy attribute gem.

Add this line to your application's Gemfile:

gem 'lazy-attribute'

And then execute:

$ bundle

Or install it yourself as:

$ gem install lazy-attribute

In Model

class User < ActiveRecord::Base

  lazy_attribute :email

end

User['sample@email.com']

Will give you the user object matches with the email and will return nil if record not found

lazy_attribute :email, raise_error: true

Will give you the user object matches with the email and will raise ActiveRecord::RecordNotFound Exception if record not found

You can use more than one lazy_attribute to your model by providing unique key for that

lazy_attribute :first_name, raise_error: true, key: :fn

User.fn('first name')

lazy_attribute :email, create_if_not_found: true

Will try to fetch the user object with the matched email address, if the record is not found in the db the same will be created. If any error like validation protected the record being saved, then the new built object will be returned.

user = User['invalid email']

user.errors.message
=> {:email=>["Please enter valid email format"]}

if you want the exception needs to be threw, then use the raise_error: true option

1. Fork it ( https://github.com/selvachezhian/lazy-attribute/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request