Class: Structural::Model::Field

Inherits:
Object
  • Object
show all
Defined in:
lib/structural/model/field.rb

Direct Known Subclasses

Association

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model, name, options) ⇒ Field

Returns a new instance of Field.



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# File 'lib/structural/model/field.rb', line 4

def initialize(model, name, options)
  @model = model
  @name = name
  @options = options
end

Instance Attribute Details

#model ⇒ Object (readonly)

Returns the value of attribute model.



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# File 'lib/structural/model/field.rb', line 58

def model
  @model
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/structural/model/field.rb', line 58

def name
  @name
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/structural/model/field.rb', line 58

def options
  @options
end

Instance Method Details

#cast(value) ⇒ Object 



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# File 'lib/structural/model/field.rb', line 28

def cast(value)
  TypeCasts.cast(options.fetch(:type, value.class), value)
end

#default ⇒ Object 



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# File 'lib/structural/model/field.rb', line 54

def default
  options.fetch(:default)
end

#default? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/structural/model/field.rb', line 50

def default?
  options.has_key?(:default)
end

#default_value ⇒ Object 



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# File 'lib/structural/model/field.rb', line 40

def default_value
  @default_value ||= proc do
    if default?
      default
    else
      raise MissingAttributeError, key
    end
  end
end

#define ⇒ Object 



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# File 'lib/structural/model/field.rb', line 10

def define
  Definer.method_memoize(model, name, ivar_name) { |data| value_of(data) }
  Definer.method(model, "#{name}?") { |obj| presence_of(obj.data) }
  hook_define
end

#hook_define ⇒ Object 



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# File 'lib/structural/model/field.rb', line 16

def hook_define
end

#ivar_name ⇒ Object 



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# File 'lib/structural/model/field.rb', line 36

def ivar_name
  @ivar_name ||= "@#{@name}"
end

#key ⇒ Object 



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# File 'lib/structural/model/field.rb', line 32

def key
  options.fetch(:key, name).to_sym
end

#presence_of(data) ⇒ Object 



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# File 'lib/structural/model/field.rb', line 24

def presence_of(data)
  data.has_key?(key) && !data.fetch(key).nil?
end

#value_of(data) ⇒ Object 



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# File 'lib/structural/model/field.rb', line 19

def value_of(data)
  value = data.fetch(key, &default_value)
  cast(value)
end