Hi,
I propose to add #where! finder that raises an exception if the relation is
empty like find_by_xxx! method in Rails3.
Rails 4 is getting rid of dynamic finders, so
User.find_by_hash(hash)
becomes
User.where(hash: hash) # .first
Okay, not a big deal. But what is the best way to deal do with dynamic bang
finders like User.find_by_hash!(hash) since there is no where!() method?
A suggestion I got on Stackoverflow
(http://stackoverflow.com/questions/14372963/dynamic-bang-finders-in-rails-4/15257207)
is to add a #where! method.
If you need a method that finds all but raises exception if the relation is
empty, you can create such new method for your models yourself (or mixin to
ActiveRecord::QueryMethods). Something like:
def where!(*args)
rel = where(*args)
raise RecordNotFound if rel.empty?
rel
end
--
Nick
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