Skip to Content Skip to Search

class ActiveModel::Error

Active Model Error

Represents one single error

Constants

CALLBACKS_OPTIONS

[:if, :unless, :on, :allow_nil, :allow_blank, :strict]

MESSAGE_OPTIONS

[:message]

Attributes

[R] attribute

The attribute of base which the error belongs to
[R] base

The object which the error belongs to
[R] options

The options provided when calling errors#add
[R] raw_type

The raw value provided as the second parameter when calling errors#add
[R] type

The type of error, defaults to :invalid unless specified

Public class methods

new(base, attribute, type = :invalid, **options)

Source code GitHub 
# File activemodel/lib/active_model/error.rb, line 103
def initialize(base, attribute, type = :invalid, **options)
  @base = base
  @attribute = attribute
  @raw_type = type
  @type = type || :invalid
  @options = options
end

Public instance methods

detail()

Alias for: details.

details()

Also aliased as: detail.

Returns the error details.

error = ActiveModel::Error.new(person, :name, :too_short, count: 5)
error.details
# => { error: :too_short, count: 5 }
Source code GitHub 
# File activemodel/lib/active_model/error.rb, line 149
def details
  { error: raw_type }.merge(options.except(*CALLBACKS_OPTIONS + MESSAGE_OPTIONS))
end

full_message()

Returns the full error message.

error = ActiveModel::Error.new(person, :name, :too_short, count: 5)
error.full_message
# => "Name is too short (minimum is 5 characters)"
Source code GitHub 
# File activemodel/lib/active_model/error.rb, line 159
def full_message
  self.class.full_message(attribute, message, @base)
end

match?(attribute, type = nil, **options)

See if error matches provided attribute, type, and options.

Omitted params are not checked for a match.

Source code GitHub 
# File activemodel/lib/active_model/error.rb, line 166
def match?(attribute, type = nil, **options)
  if @attribute != attribute || (type && @type != type)
    return false
  end

  options.each do |key, value|
    if @options[key] != value
      return false
    end
  end

  true
end

message()

Returns the error message.

error = ActiveModel::Error.new(person, :name, :too_short, count: 5)
error.message
# => "is too short (minimum is 5 characters)"
Source code GitHub 
# File activemodel/lib/active_model/error.rb, line 135
def message
  case raw_type
  when Symbol
    self.class.generate_message(attribute, raw_type, @base, options.except(*CALLBACKS_OPTIONS))
  else
    raw_type
  end
end

strict_match?(attribute, type, **options)

See if error matches provided attribute, type, and options exactly.

All params must be equal to Error’s own attributes to be considered a strict match.

Source code GitHub 
# File activemodel/lib/active_model/error.rb, line 184
def strict_match?(attribute, type, **options)
  return false unless match?(attribute, type)

  options == @options.except(*CALLBACKS_OPTIONS + MESSAGE_OPTIONS)
end

Protected instance methods

attributes_for_hash()

Source code GitHub 
# File activemodel/lib/active_model/error.rb, line 204
def attributes_for_hash
  [@base, @attribute, @raw_type, @options.except(*CALLBACKS_OPTIONS)]
end

Definition files