Class: ActiveModel::Validations::StateHistoryValidator

Inherits:
ActiveModel::Validator
  • Object
show all
Defined in:
lib/active_model/validations/state_history_validator.rb

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ StateHistoryValidator

Returns a new instance of StateHistoryValidator.



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# File 'lib/active_model/validations/state_history_validator.rb', line 5

def initialize(options = {})
  super

  @association = options[:association]

  @start = options[:start] || :start
  @end   = options[:end]   || :end
  @order = options[:order] || "#{@start.to_s} ASC, ISNULL(#{@end}) ASC, #{@end} ASC"
  @allow = options[:allow] || []
  @match = options[:self_transition_match] || []
end

Instance Method Details

#validate(record) ⇒ Object 



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# File 'lib/active_model/validations/state_history_validator.rb', line 17

def validate(record)
  entries = record.send(@association)
  sorted_history = entries.order(@order)

  return if sorted_history.blank?

  if !@allow.include? :inactive_end_state
    valid = last_end_nil?(sorted_history, record.errors)
    return unless valid
  end

  no_self_trans = no_gaps = no_overlaps = no_nils = true
  sorted_history.each_cons(2) do |a|
    this_entry = a[0]
    next_entry = a[1]

    if !@allow.include? :self_transitions
      no_self_trans = no_self_transitions?(this_entry, next_entry, record.errors)
    end

    if !@allow.include? :gaps
      no_gaps = no_gaps?(this_entry, next_entry, record.errors)
    end

    if !@allow.include? :overlaps
      no_overlaps = no_overlaps?(this_entry, next_entry, record.errors)
    end

    if !@allow.include? :active_middle_states
      no_nils = no_intervening_nils?(this_entry, record.errors)
    end

    return unless no_self_trans && no_gaps && no_overlaps && no_nils
  end
end