Method: Iry::Macros#exclusion_constraint

Defined in:
lib/iry/macros.rb

#exclusion_constraint(key, name: nil, message: :taken) ⇒ void

This method returns an undefined value.

Tracks exclusion constraint for the given key and convert constraint errors into validation errors

Raises:

  • (ArgumentError) —

    raised if constraint name already in use by another constraint of any type



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# File 'lib/iry/macros.rb', line 39

def exclusion_constraint(
  key,
  name: nil,
  message: :taken
)
  name ||= Constraint::Exclusion.infer_name(key, table_name)

  if constraints.key?(name)
    raise ArgumentError, "Constraint already exists"
  end

  self.constraints = constraints.dup
  constraints[name] = Constraint::Exclusion.new(
    key,
    message: message,
    name: name
  )
end