Module: OverrideActiveRecordDynamicFinders::ClassMethods

Defined in:
lib/override_active_record_dynamic_finders/class_methods.rb

Constant Summary collapse

KEYS_SET = 
[:joins, :select, :group, :order, :having, :limit, :offset, :conditions, :extend, :include]
ALL = 
:all

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_id, *args, &block) ⇒ Object (private) 



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# File 'lib/override_active_record_dynamic_finders/class_methods.rb', line 51

def method_missing(method_id, *args, &block)
  method = method_id.to_s

  if method.start_with?("find_")

    case method
    when /^find_(all_|last_)?by_([_a-zA-Z]\w*)$/
      finder  = :last if $1 == 'last_'
      finder  = :all if $1 == 'all_'
      names   = $2.split("_and_")
    when /^find_by_([_a-zA-Z]\w*)$/
      names   = $1.split("_and_")
    end

    finder      ||= :first
    finder_hash = {}
    finder_hash = args.delete(args.last) if args.last.is_a?(Hash)

    raise "Invalid number of arguments", ArgumentError if args.size != names.size

    conditions = nil

    if finder_hash[:conditions].blank? || finder_hash[:conditions].is_a?(Hash)
      conditions = {}

      names.each_with_index do |name, index|
        conditions[name.to_sym] = args[index]
      end

      finder_hash[:conditions] = {} if finder_hash[:conditions].blank?
      finder_hash[:conditions].merge!(conditions)

    else
      conditions = []

      names.each_with_index do |name, index|
        conditions << " #{name} = '#{args[index]}' "
      end

      conditions = conditions.join(" AND ")

      if finder_hash[:conditions].is_a?(Array)
        finder_hash[:conditions][0] += " AND " + conditions
      else
        finder_hash[:conditions] += " AND " + conditions
      end
    end

    find(finder, finder_hash)

  else
    super method_id, *args, &block
  end
end

Instance Method Details

#count(*args) ⇒ Object 



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# File 'lib/override_active_record_dynamic_finders/class_methods.rb', line 18

def count(*args)

  if args.last.is_a?(Hash) && ALL == args.first
    compute_result(*args).count
  elsif args.last.is_a?(Hash) && ALL != args.first
    compute_result(*args).count(args.first)
  elsif args.first.is_a?(Symbol) && ALL == args.first
    count
  else
    super *args
  end
end

#find(*args) ⇒ Object 



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# File 'lib/override_active_record_dynamic_finders/class_methods.rb', line 7

def find(*args)
  if args.first.is_a?(Symbol) && args.last.is_a?(Hash)
    compute_result(*args).send(args.first)
  elsif args.first.is_a?(Symbol) && !args.last.is_a?(Hash)
    result = self
    result.send(args.first)
  else
    super *args
  end
end