123456789_123456789_123456789_123456789_123456789_

Class: ActiveRecord::Type::Json

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
Instance Chain:
Inherits: ActiveModel::Type::Value
Defined in: activerecord/lib/active_record/type/json.rb

Class Method Summary

::ActiveModel::Type::Value - Inherited

.new

Initializes a type with three basic configuration settings: precision, limit, and scale.

Instance Attribute Summary

::ActiveModel::Type::Helpers::Mutable - Included

::ActiveModel::Type::Value - Inherited

#limit, #precision, #scale,
#binary?

These predicates are not documented, as I need to look further into their use, and see if they can be removed entirely.

#mutable?, #serialized?

Instance Method Summary

::ActiveModel::Type::Helpers::Mutable - Included

#cast,
#changed_in_place?

raw_old_value will be the _before_type_cast version of the value (likely a string).

::ActiveModel::Type::Value - Inherited

#==, #as_json, #assert_valid_value,
#cast

::ActiveRecord::Type casts a value from user input (e.g. from a setter).

#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?
#hash,
#serializable?

Returns true if this type can convert value to a type that is usable by the database.

#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 ::Symbol.

#cast_value

Convenience method for types which do not need separate type casting behavior for user and database inputs.

#force_equality?, #map,
#type_cast_for_schema

::ActiveRecord::Type casts a value for schema dumping.

#value_constructed_by_mass_assignment?

::ActiveModel::Type::SerializeCastValue - Included

Constructor Details

This class inherits a constructor from ActiveModel::Type::Value

Instance Method Details

#accessor

[ GitHub ]

  
# File 'activerecord/lib/active_record/type/json.rb', line 25

def accessor
  ActiveRecord::Store::StringKeyedHashAccessor
end

#changed_in_place?(raw_old_value, new_value) ⇒ Boolean

[ GitHub ]

  
# File 'activerecord/lib/active_record/type/json.rb', line 21

def changed_in_place?(raw_old_value, new_value)
  deserialize(raw_old_value) != new_value
end

#deserialize(value)

[ GitHub ]

  
# File 'activerecord/lib/active_record/type/json.rb', line 12

def deserialize(value)
  return value unless value.is_a?(::String)
  ActiveSupport::JSON.decode(value) rescue nil
end

#serialize(value)

[ GitHub ]

  
# File 'activerecord/lib/active_record/type/json.rb', line 17

def serialize(value)
  ActiveSupport::JSON.encode(value) unless value.nil?
end

#type

[ GitHub ]

  
# File 'activerecord/lib/active_record/type/json.rb', line 8

def type
  :json
end