Class: SortDescriptorLiteral::SortDescriptor

Inherits:
Object
  • Object
show all
Defined in:
lib/PredicateLiteralKit4Ruby.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(key, selector, ascending) ⇒ SortDescriptor

Returns a new instance of SortDescriptor.



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# File 'lib/PredicateLiteralKit4Ruby.rb', line 56

def initialize(key, selector, ascending)
  @key = key
  @selector = selector
  @ascending = ascending
end

Instance Attribute Details

#ascending ⇒ Object (readonly)

Returns the value of attribute ascending.



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# File 'lib/PredicateLiteralKit4Ruby.rb', line 50

def ascending
  @ascending
end

#key ⇒ Object (readonly)

Returns the value of attribute key.



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# File 'lib/PredicateLiteralKit4Ruby.rb', line 50

def key
  @key
end

#selector ⇒ Object (readonly)

Returns the value of attribute selector.



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# File 'lib/PredicateLiteralKit4Ruby.rb', line 50

def selector
  @selector
end

Class Method Details

.parse(array) ⇒ Object 



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# File 'lib/PredicateLiteralKit4Ruby.rb', line 52

def self.parse(array)
  self.new(array[0], array[1], array[2])
end

Instance Method Details

#build_arel(arel_table) ⇒ Object 



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# File 'lib/PredicateLiteralKit4Ruby.rb', line 70

def build_arel(arel_table)
  key = underscore(@key) unless (key = LITERAL_KEY_MAPPING[@key])
  key = key.to_sym
  puts "KEY: #{key}"
  return arel_table[key].asc if @ascending
  return arel_table[key].desc
end

#underscore(camel_cased_word) ⇒ Object 



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# File 'lib/PredicateLiteralKit4Ruby.rb', line 62

def underscore(camel_cased_word)
  camel_cased_word.to_s.gsub(/::/, '/').
      gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2').
      gsub(/([a-z\d])([A-Z])/, '\1_\2').
      tr("-", "_").
      downcase
end