# frozen_string_literal: true
require "cases/helper"
require "models/book"
require "models/liquid"
require "models/molecule"
require "models/electron"
module ActiveRecord
class StatementCacheTest < ActiveRecord::TestCase
def setup
@connection = ActiveRecord::Base.connection
end
def test_statement_cache
Book.create(name: "my book")
Book.create(name: "my other book")
cache = StatementCache.create(Book.connection) do |params|
Book.where(name: params.bind)
end
b = cache.execute([ "my book" ], Book.connection)
assert_equal "my book", b[0].name
b = cache.execute([ "my other book" ], Book.connection)
assert_equal "my other book", b[0].name
end
def test_statement_cache_id
b1 = Book.create(name: "my book")
b2 = Book.create(name: "my other book")
cache = StatementCache.create(Book.connection) do |params|
Book.where(id: params.bind)
end
b = cache.execute([ b1.id ], Book.connection)
assert_equal b1.name, b[0].name
b = cache.execute([ b2.id ], Book.connection)
assert_equal b2.name, b[0].name
end
def test_find_or_create_by
Book.create(name: "my book")
a = Book.find_or_create_by(name: "my book")
b = Book.find_or_create_by(name: "my other book")
assert_equal("my book", a.name)
assert_equal("my other book", b.name)
end
def test_statement_cache_with_simple_statement
cache = ActiveRecord::StatementCache.create(Book.connection) do |params|
Book.where(name: "my book").where("author_id > 3")
end
Book.create(name: "my book", author_id: 4)
books = cache.execute([], Book.connection)
assert_equal "my book", books[0].name
end
def test_statement_cache_with_complex_statement
cache = ActiveRecord::StatementCache.create(Book.connection) do |params|
Liquid.joins(molecules: :electrons).where("molecules.name" => "dioxane", "electrons.name" => "lepton")
end
salty = Liquid.create(name: "salty")
molecule = salty.molecules.create(name: "dioxane")
molecule.electrons.create(name: "lepton")
liquids = cache.execute([], Book.connection)
assert_equal "salty", liquids[0].name
end
def test_statement_cache_values_differ
cache = ActiveRecord::StatementCache.create(Book.connection) do |params|
Book.where(name: "my book")
end
3.times do
Book.create(name: "my book")
end
first_books = cache.execute([], Book.connection)
3.times do
Book.create(name: "my book")
end
additional_books = cache.execute([], Book.connection)
assert first_books != additional_books
end
def test_unprepared_statements_dont_share_a_cache_with_prepared_statements
Book.create(name: "my book")
Book.create(name: "my other book")
book = Book.find_by(name: "my book")
other_book = Book.connection.unprepared_statement do
Book.find_by(name: "my other book")
end
refute_equal book, other_book
end
def test_find_by_does_not_use_statement_cache_if_table_name_is_changed
book = Book.create(name: "my book")
Book.find_by(name: book.name) # warming the statement cache.
# changing the table name should change the query that is not cached.
Book.table_name = :birds
assert_nil Book.find_by(name: book.name)
ensure
Book.table_name = :books
end
def test_find_does_not_use_statement_cache_if_table_name_is_changed
book = Book.create(name: "my book")
Book.find(book.id) # warming the statement cache.
# changing the table name should change the query that is not cached.
Book.table_name = :birds
assert_raise ActiveRecord::RecordNotFound do
Book.find(book.id)
end
ensure
Book.table_name = :books
end
end
end
