Class: ActiveModel::Type::String
Relationships & Source Files | |
Extension / Inclusion / Inheritance Descendants | |
Subclasses:
ActiveRecord::Encryption::EncryptedAttributeType, ActiveRecord::Type::Text, ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Macaddr, ActiveRecord::ConnectionAdapters::PostgreSQL::OID::SpecializedString, ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Xml
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Super Chains via Extension / Inclusion / Inheritance | |
Class Chain:
self,
ImmutableString ,
Value
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Instance Chain:
self,
ImmutableString ,
Value
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Inherits: |
ActiveModel::Type::ImmutableString
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Defined in: | activemodel/lib/active_model/type/string.rb |
Overview
Active Model String Type
::ActiveModel::Attribute
type for strings. It is registered under the :string
key.
This class is a specialization of ImmutableString
. It performs coercion in the same way, and can be configured in the same way. However, it accounts for mutable strings, so dirty tracking can properly check if a string has changed.
Class Method Summary
ImmutableString
- Inherited
Value
- Inherited
.new | Initializes a type with three basic configuration settings: precision, limit, and scale. |
Instance Attribute Summary
Value
- Inherited
Instance Method Summary
ImmutableString
- Inherited
Value
- Inherited
#==, #as_json, #assert_valid_value, | |
#cast |
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#changed? | Determines whether a value has changed for dirty checking. |
#changed_in_place? | Determines whether the mutable value has been modified since it was read. |
#deserialize | Converts a value from database input to the appropriate ruby type. |
#eql? | Alias for Value#==. |
#hash, | |
#serializable? | Returns true if this type can convert |
#serialize | Casts a value from the ruby type to a type that the database knows how to understand. |
#type | Returns the unique type name as a |
#cast_value | Convenience method for types which do not need separate type casting behavior for user and database inputs. |
Constructor Details
This class inherits a constructor from ActiveModel::Type::ImmutableString
Instance Method Details
#changed_in_place?(raw_old_value, new_value) ⇒ Boolean
# File 'activemodel/lib/active_model/type/string.rb', line 16
def changed_in_place?(raw_old_value, new_value) if new_value.is_a?(::String) raw_old_value != new_value end end
#to_immutable_string
[ GitHub ]# File 'activemodel/lib/active_model/type/string.rb', line 22
def to_immutable_string ImmutableString.new( true: @true, false: @false, limit: limit, precision: precision, scale: scale, ) end