Class: Credit

Inherits:
Entry
  • Object
show all
Defined in:
app/models/credit.rb

Instance Method Summary collapse

Methods inherited from Entry

#readonly?

Instance Method Details

#conservation_principle ⇒ Object 



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# File 'app/models/credit.rb', line 20

def conservation_principle
  errors.add(:base, "Credit and debit amounts must add up to zero") unless
    (debit.nil? or amount + debit.amount == 0)
end

#debit ⇒ Object 



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# File 'app/models/credit.rb', line 12

def debit
  transaction ? transaction.debit : nil
end

#require_debit ⇒ Object 



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# File 'app/models/credit.rb', line 16

def require_debit
  errors.add(:base, "Debit must be saved before credit") unless !debit.nil?
end

#sign_convention ⇒ Object 



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# File 'app/models/credit.rb', line 8

def sign_convention
  errors.add(:amount, "Credit must be non-negative") unless amount >= 0
end