Module: FmtAlias::Aliases::ClassMethods

Defined in:
lib/fmt_alias/aliases.rb

Instance Method Summary collapse

Instance Method Details

#date_fmt_alias(attr, fmt, *args) ⇒ Object 



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# File 'lib/fmt_alias/aliases.rb', line 21

def date_fmt_alias(attr, fmt, *args)
  define_alias_for(
    attr,
    proc { send(attr).strftime(fmt) unless send(attr).nil? },
    proc { |value| send(:"#{attr}=", (Time.parse(value, fmt) rescue nil)) },
    *args
  )
end

#define_alias_for(attr, getter, setter, *args) ⇒ Object 



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# File 'lib/fmt_alias/aliases.rb', line 13

def define_alias_for(attr, getter, setter, *args)
  options = args.extract_options!
  name = options.delete(:name) || "#{attr}_fmt"
    
  define_method name, &getter
  define_method "#{name}=", &setter
end

#split_alias(attr, *args) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/fmt_alias/aliases.rb', line 30

def split_alias(attr, *args)
  options = args.extract_options!
  polymorphic = options.delete(:polymorphic)
  attrs = options.delete(:attrs)
  delim = options.delete(:delimiter) || ':'
  raise ArgumentError, "Specify :polymorphic or :attrs option for split_alias :#{attr} in #{self.name}" if attrs.blank? && polymorphic.blank?
  if polymorphic
    attrs = ["#{attr}_type", "#{attr}_id"]
    options[:name] ||= "#{attr}_type_id"
  else
    options[:name] ||= "#{attr}_split"
  end
  
  define_alias_for(
    attr,
    proc { 
      r = attrs.map { |a| send(a) }.compact
      r.present? ? r.join(delim) : nil
    },
    proc { |value| 
      values = value.to_s.split(delim)
      h = Hash[attrs.zip(values)]
      h.map { |a, v| send("#{a}=", v) }        
    },
    options
  )        
end