Find which alias method is called in rails model

Question

I am new to rails development. I have created some aliases to a method and I want to know that which alias is called.

I have this code.

alias_method :net_stock_quantity_equals :net_stock_quantity
alias_method :net_stock_quantity_gte :net_stock_quantity
alias_method :net_stock_quantity_lte :net_stock_quantity
alias_method :net_stock_quantity_gt :net_stock_quantity
alias_method :net_stock_quantity_lt :net_stock_quantity

def net_stock_quantity
  #some code here
end

I want to know that user has called which alias. Like if user calls net_stock_quantity_equals then I should know that the user has called net_stock_quantity_equals not net_stock_quantity.

Any help would be appreciated.

Answer 1

def net_stock_quantity(alias_used = :net_stock_quantity)
    method_called = caller[0]
    #some code
end

The method_called will contain the name of called alias.

Answer 2

You could override method_missing to do it.

def method_missing(method_name, *args, &block)
  if method_name.to_s =~ /^net_stock_quantity_/ 
    net_stock_quantity method_name
  else
    super
  end
end

def net_stock_quantity(alias_used = :net_stock_quantity)
  #some code
end

There's a tutorial here doing something similar http://net.tutsplus.com/tutorials/ruby/ruby-for-newbies-missing-methods/

Answer 3

It think you are approaching the problem incorrectly - instead of using alias methods, send through :equals, :gte, :lte etc. as a parameter to the method ie:

def net_stock_quantity(type = :all)
  # do something with the type here
end