Class: NinjaModel::Attribute

Inherits:
Object
  • Object
show all
Defined in:
lib/ninja_model/attribute.rb

Defined Under Namespace

Modules: Format

Constant Summary collapse

VALID_TYPES = 
[:string, :integer, :float, :date, :datetime, :boolean]
TRUE_VALUES = 
[true, 1, '1', 't', 'T', 'true', 'TRUE'].to_set
FALSE_VALUES = 
[false, 0, '0', 'f', 'F', 'false', 'FALSE'].to_set

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, type, options = {}) ⇒ Attribute

Returns a new instance of Attribute.

Raises:



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# File 'lib/ninja_model/attribute.rb', line 12

def initialize(name, type, options = {})
  @name, @type = name.to_s, type
  @default = options[:default]
  raise UnsupportedType.new("Invalid type: #{@type}") unless VALID_TYPES.include?(@type)
end

Instance Attribute Details

#default ⇒ Object (readonly)

Returns the value of attribute default.



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# File 'lib/ninja_model/attribute.rb', line 8

def default
  @default
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/ninja_model/attribute.rb', line 8

def name
  @name
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/ninja_model/attribute.rb', line 8

def type
  @type
end

Class Method Details

.convert_to_string(value) ⇒ Object 



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# File 'lib/ninja_model/attribute.rb', line 62

def convert_to_string(value)
  case value
  when String, NilClass
    value
  when Fixnum, Float, Date, DateTime, TrueClass, FalseClass
    value.to_s
  else
    raise InvalidConversion.new("Unable to convert #{value.inspect} to string")
  end
end

.string_to_date(string) ⇒ Object 



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# File 'lib/ninja_model/attribute.rb', line 73

def string_to_date(string)
  return string unless string.is_a?(String)
  return nil if string.empty?

  fast_string_to_date(string) || fallback_string_to_date(string)
end

.string_to_time(string) ⇒ Object 



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# File 'lib/ninja_model/attribute.rb', line 80

def string_to_time(string)
  return string unless string.is_a?(String)
  return nil if string.empty?

  fast_string_to_time(string) || fallback_string_to_time(string)
end

.value_to_boolean(value) ⇒ Object

convert something to a boolean



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# File 'lib/ninja_model/attribute.rb', line 88

def value_to_boolean(value)
  if value.is_a?(String) && value.blank?
    nil
  else
    TRUE_VALUES.include?(value)
  end
end

Instance Method Details

#convert(value) ⇒ Object 



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# File 'lib/ninja_model/attribute.rb', line 41

def convert(value)
  case type
  when :string    then self.class.convert_to_string(value)
  when :integer   then value.to_i rescue value ? 1 : 0
  when :float     then value.to_f rescue value ? 1.0 : 0.0
  when :date      then self.class.string_to_date(value)
  when :datetime  then self.class.string_to_time(value)
  when :boolean   then self.class.value_to_boolean(value)
  end
end

#klass ⇒ Object

Most of the following code was taken from ActiveRecord. Credit to the Rails team is due.



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

def klass
  case type
    when :integer       then Fixnum
    when :float         then Float
    when :decimal       then BigDecimal
    when :datetime      then Time
    when :date          then Date
    when :timestamp     then Time
    when :time          then Time
    when :text, :string then String
    when :binary        then String
    when :boolean       then Object
  end
end

#number? ⇒ Boolean

Returns:

  • (Boolean) 


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

def number?
  [:integer, :float].include?(@type)
end