Class: Datamappify::Data::Mapper::Attribute

Inherits:
Object
  • Object
show all
Defined in:
lib/datamappify/data/mapper/attribute.rb

Overview

Represents an entity attribute and its associated data source

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, source) ⇒ Attribute

Returns a new instance of Attribute.

Parameters:

  • name (Symbol) —

    name of the attribute

  • source (String) —

    data provider, class and attribute, e.g. “ActiveRecord::User#surname”



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# File 'lib/datamappify/data/mapper/attribute.rb', line 32

def initialize(name, source)
  @key  = name
  @name = name.to_s

  @provider_name, @source_class_name, @source_attribute_name = parse_source(source)
end

Instance Attribute Details

#key ⇒ Symbol (readonly)

Same as name, but in symbol

Returns:

  • (Symbol) 


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# File 'lib/datamappify/data/mapper/attribute.rb', line 9

def key
  @key
end

#name ⇒ String (readonly)

Returns:

  • (String) 


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# File 'lib/datamappify/data/mapper/attribute.rb', line 12

def name
  @name
end

#provider_name ⇒ String (readonly)

Returns:

  • (String) 


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# File 'lib/datamappify/data/mapper/attribute.rb', line 15

def provider_name
  @provider_name
end

#source_attribute_name ⇒ String (readonly)

Returns:

  • (String) 


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# File 'lib/datamappify/data/mapper/attribute.rb', line 21

def source_attribute_name
  @source_attribute_name
end

#source_class_name ⇒ String (readonly)

Returns:

  • (String) 


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# File 'lib/datamappify/data/mapper/attribute.rb', line 18

def source_class_name
  @source_class_name
end

#value ⇒ any

Returns:

  • (any) 


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# File 'lib/datamappify/data/mapper/attribute.rb', line 24

def value
  @value
end

Instance Method Details

#parse_source(source) ⇒ Array<String> (private)

Returns an array with provider name, source class name and source attribute name.

Returns:

  • (Array<String>) —

    an array with provider name, source class name and source attribute name



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# File 'lib/datamappify/data/mapper/attribute.rb', line 53

def parse_source(source)
  provider_name, source_class_and_attribute = source.split('::')

  [provider_name, *source_class_and_attribute.split('#')]
end

#primary_key? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/datamappify/data/mapper/attribute.rb', line 45

def primary_key?
  source_attribute_name == 'id'
end

#source_class ⇒ Class

Returns:

  • (Class) 


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# File 'lib/datamappify/data/mapper/attribute.rb', line 40

def source_class
  @source_class ||= Record.find_or_build(provider_name, source_class_name)
end