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Contents
module MongoMapper
# @api private
module Finders
def dynamic_find(finder, args)
attributes = {}
finder.attributes.each_with_index do |attr, index|
attributes[attr] = args[index]
end
options = args.extract_options!.merge(attributes)
if result = find(finder.finder, options)
result
else
if finder.raise?
raise DocumentNotFound, "Couldn't find Document with #{attributes.inspect} in collection named #{collection.name}"
end
if finder.instantiator
self.send(finder.instantiator, attributes)
end
end
end
protected
def method_missing(method, *args, &block)
finder = DynamicFinder.new(method)
if finder.found?
dynamic_find(finder, args)
else
super
end
end
end
class DynamicFinder
attr_reader :method, :attributes, :finder, :bang, :instantiator
def initialize(method)
@method = method
@finder = :first
@bang = false
match
end
def found?
@finder.present?
end
def raise?
bang == true
end
protected
def match
case method.to_s
when /^find_(all_by|by)_([_a-zA-Z]\w*)$/
@finder = :all if $1 == 'all_by'
names = $2
when /^find_by_([_a-zA-Z]\w*)\!$/
@bang = true
names = $1
when /^find_or_(initialize|create)_by_([_a-zA-Z]\w*)$/
@instantiator = $1 == 'initialize' ? :new : :create
names = $2
else
@finder = nil
end
@attributes = names && names.split('_and_')
end
end
end
Version data entries
29 entries across 29 versions & 5 rubygems