Class: Friendly::Attribute

Inherits:

Object

• Object
• Friendly::Attribute

show all

Defined in:

lib/friendly/attribute.rb

Instance Attribute Summary

• - (Object) default_value readonly Returns the value of attribute default_value.
• - (Object) klass readonly Returns the value of attribute klass.
• - (Object) name readonly Returns the value of attribute name.
• - (Object) type readonly Returns the value of attribute type.

Class Method Summary

• + (Object) converters
• + (Boolean) custom_type?(klass)
• + (Object) deregister_type(type)
• + (Object) register_type(type, sql_type, &block)
• + (Object) sql_type(type)
• + (Object) sql_types

Instance Method Summary

• - (Object) assign_default_value(document)
• - (Object) convert(value)
• - (Object) default
• - (Attribute) initialize(klass, name, type, options = {}) constructor A new instance of Attribute.
• - (Object) typecast(value)

36
37
38
39
40
41
42

# File 'lib/friendly/attribute.rb', line 36

def initialize(klass, name, type, options = {})
  @klass         = klass
  @name          = name
  @type          = type
  @default_value = options[:default]
  build_accessors
end

34
35
36

# File 'lib/friendly/attribute.rb', line 34

def default_value
  @default_value
end

34
35
36

# File 'lib/friendly/attribute.rb', line 34

def klass
  @klass
end

34
35
36

# File 'lib/friendly/attribute.rb', line 34

def name
  @name
end

34
35
36

# File 'lib/friendly/attribute.rb', line 34

def type
  @type
end

22
23
24

# File 'lib/friendly/attribute.rb', line 22

def converters
  @converters ||= {}
end

26
27
28

# File 'lib/friendly/attribute.rb', line 26

def custom_type?(klass)
  !sql_type(klass).nil?
end

9
10
11
12

# File 'lib/friendly/attribute.rb', line 9

def deregister_type(type)
  sql_types.delete(type.name)
  converters.delete(type)
end

4
5
6
7

# File 'lib/friendly/attribute.rb', line 4

def register_type(type, sql_type, &block)
  sql_types[type.name] = sql_type
  converters[type]     = block
end

14
15
16

# File 'lib/friendly/attribute.rb', line 14

def sql_type(type)
  sql_types[type.name]
end

18
19
20

# File 'lib/friendly/attribute.rb', line 18

def sql_types
  @sql_types ||= {}
end

63
64
65

# File 'lib/friendly/attribute.rb', line 63

def assign_default_value(document)
  document.send(:#{name}=", default)
end

48
49
50
51

# File 'lib/friendly/attribute.rb', line 48

def convert(value)
  assert_converter_exists(value)
  converters[type].call(value)
end

53
54
55
56
57
58
59
60
61

# File 'lib/friendly/attribute.rb', line 53

def default
  if !default_value.nil?
    default_value
  elsif type.respond_to?(:new)
    type.new
  else
    nil
  end
end

44
45
46

# File 'lib/friendly/attribute.rb', line 44

def typecast(value)
  !type || value.is_a?(type) ? value : convert(value)
end