I noticed this issue when I was getting inconsistent behaviour from passing find_or_create a Time object as the value for a query against a date field. create type-casts this value before saving, but it seems find and where do not.

The problem can obviously be fixed by calling #to_date on the Time object beforehand, or using a Date object in the first place, but I believe the type-casting behaviour should be consistent to avoid confusion.

Steps to reproduce

View Test Case

date_as_time = Time.new(2016,06,10,19,0,0,'-08:00')
Post.create(date: date_as_time)
# INSERT INTO "posts" ("date") VALUES (?)  [["date", Wed, 10 Jun 2016]]

Expected behavior

Post.where(date: date_as_time).count
# => 1

Post.find_by(date: date_as_time)
# => <Post id: 1, date: "2016-06-10">

Actual behavior

Post.where(date: date_as_time).count
# => 0

Post.find_by(date: date_as_time)
# => nil

System configuration

Rails version: 5.0.0.rc1

Ruby version: 2.3.0p0