Module: ActiveModel::Type::Helpers::Numeric

Do not use. This module is for internal use only.

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Included In: `::ActiveModel::Type::BigInteger`, `::ActiveModel::Type::Decimal`, `::ActiveModel::Type::Float`, `::ActiveModel::Type::Integer`, `::ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Decimal`, `::ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Money`, `::ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Oid`, `::ActiveRecord::ConnectionAdapters::SQLite3Adapter::SQLite3Integer`, `::ActiveRecord::Type::DecimalWithoutScale`, `::ActiveRecord::Type::UnsignedInteger`
Defined in:	activemodel/lib/active_model/type/helpers/numeric.rb

Constant Summary

NUMERIC_REGEX = private
# File 'activemodel/lib/active_model/type/helpers/numeric.rb', line 56
```
/\A\s*[+-]?\d/
```

Instance Method Summary

#cast(value)
#changed?(old_value, _new_value, new_value_before_type_cast) ⇒ Boolean
#serialize(value)
#serialize_cast_value(value)
#equal_nan?(old_value, new_value) ⇒ Boolean private
#non_numeric_string?(value) ⇒ Boolean private
#number_to_non_number?(old_value, new_value_before_type_cast) ⇒ Boolean private

Instance Method Details

#cast(value)

[ GitHub ]

# File 'activemodel/lib/active_model/type/helpers/numeric.rb', line 15


def cast(value)
  # Checks whether the value is numeric. Spaceship operator
  # will return nil if value is not numeric.
  value = if value <=> 0
    value
  else
    case value
    when true then 1
    when false then 0
    else value.presence
    end
  end

  super(value)
end

#changed?(old_value, _new_value, new_value_before_type_cast) ⇒ Boolean

[ GitHub ]

# File 'activemodel/lib/active_model/type/helpers/numeric.rb', line 31


def changed?(old_value, _new_value, new_value_before_type_cast) # :nodoc:
  (super || number_to_non_number?(old_value, new_value_before_type_cast)) &&
    !equal_nan?(old_value, new_value_before_type_cast)
end

#equal_nan?(old_value, new_value) ⇒ Boolean (private)

[ GitHub ]

# File 'activemodel/lib/active_model/type/helpers/numeric.rb', line 37


def equal_nan?(old_value, new_value)
  (old_value.is_a?(::Float) || old_value.is_a?(BigDecimal)) &&
    old_value.nan? &&
    old_value.instance_of?(new_value.class) &&
    new_value.nan?
end

#non_numeric_string?(value) ⇒ Boolean (private)

[ GitHub ]

# File 'activemodel/lib/active_model/type/helpers/numeric.rb', line 49


def non_numeric_string?(value)
  # 'wibble'.to_i will give zero, we want to make sure
  # that we aren't marking int zero to string zero as
  # changed.
  !NUMERIC_REGEX.match?(value)
end

#number_to_non_number?(old_value, new_value_before_type_cast) ⇒ Boolean (private)

[ GitHub ]

# File 'activemodel/lib/active_model/type/helpers/numeric.rb', line 44


def number_to_non_number?(old_value, new_value_before_type_cast)
  old_value != nil && !new_value_before_type_cast.is_a?(::Numeric) &&
    non_numeric_string?(new_value_before_type_cast.to_s)
end

#serialize(value)

[ GitHub ]

# File 'activemodel/lib/active_model/type/helpers/numeric.rb', line 7


def serialize(value)
  cast(value)
end

#serialize_cast_value(value)

[ GitHub ]

# File 'activemodel/lib/active_model/type/helpers/numeric.rb', line 11


def serialize_cast_value(value)
  value
end