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Class: ActiveRecord::Type::Json

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
ConnectionAdapters::PostgreSQL::OID::Jsonb
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::ActiveModel::Type::Value
Instance Chain:
self, ::ActiveModel::Type::Helpers::Mutable, ::ActiveModel::Type::Value, ::ActiveModel::Type::SerializeCastValue
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

#mutable?

::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?

Alias for ActiveModel::Type::Value#==.
#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

#initialize, #itself_if_serialize_cast_value_compatible

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