Class: ActiveRecord::Coders::YAMLColumn

Inherits:
Object
  • Object
show all
Defined in:
lib/active_record/coders/yaml_column.rb

Overview

:nodoc:

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(object_class = Object) ⇒ YAMLColumn

Returns a new instance of YAMLColumn.



9
10
11
12
 
# File 'lib/active_record/coders/yaml_column.rb', line 9

def initialize(object_class = Object)
  @object_class = object_class
  check_arity_of_constructor
end

Instance Attribute Details

#object_class ⇒ Object

Returns the value of attribute object_class.



7
8
9
 
# File 'lib/active_record/coders/yaml_column.rb', line 7

def object_class
  @object_class
end

Instance Method Details

#assert_valid_value(obj) ⇒ Object 



32
33
34
35
36
37
 
# File 'lib/active_record/coders/yaml_column.rb', line 32

def assert_valid_value(obj)
  unless obj.nil? || obj.is_a?(object_class)
    raise SerializationTypeMismatch,
      "Attribute was supposed to be a #{object_class}, but was a #{obj.class}. -- #{obj.inspect}"
  end
end

#dump(obj) ⇒ Object 



14
15
16
17
18
19
 
# File 'lib/active_record/coders/yaml_column.rb', line 14

def dump(obj)
  return if obj.nil?

  assert_valid_value(obj)
  YAML.dump obj
end

#load(yaml) ⇒ Object 



21
22
23
24
25
26
27
28
29
30
 
# File 'lib/active_record/coders/yaml_column.rb', line 21

def load(yaml)
  return object_class.new if object_class != Object && yaml.nil?
  return yaml unless yaml.is_a?(String) && yaml =~ /^---/
  obj = YAML.load(yaml)

  assert_valid_value(obj)
  obj ||= object_class.new if object_class != Object

  obj
end