This plugin is meant to simplify models related to the reservation of physical resources.
The plugin provides one class validation method for your ActiveRecord models:
validates_not_overlapping(start_attribute, finish_attribute, options)
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:message – lets you specify a custom error message
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:allow_equal_endpoints – lets you set whether endpoints of 2 models can be equal (default value: false)
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:scope – scope the comparison to an attribute or method when passed a symbol, also can take a string (with delayed interpolation) for more complicated scopes
class CarRental < ActiveRecord::Base validates_not_overlapping :start, :finish, :scope => :car_id, # could also be expressed as: :scope => ‘car_rentals.car_id = #{car_id}’ :message => ‘has already been rented during this time.’ end
Copyright © 2008 Jake Howerton, released under the MIT license