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# frozen_string_literal: true
require "cases/helper"
require "support/ddl_helper"
class Mysql2AdapterTest < ActiveRecord::Mysql2TestCase
include DdlHelper
def setup
@conn = ActiveRecord::Base.connection
@connection_handler = ActiveRecord::Base.connection_handler
end
def test_exec_query_nothing_raises_with_no_result_queries
assert_nothing_raised do
with_example_table do
@conn.exec_query("INSERT INTO ex (number) VALUES (1)")
@conn.exec_query("DELETE FROM ex WHERE number = 1")
end
end
end
def test_columns_for_distinct_zero_orders
assert_equal "posts.id",
@conn.columns_for_distinct("posts.id", [])
end
def test_columns_for_distinct_one_order
assert_equal "posts.created_at AS alias_0, posts.id",
@conn.columns_for_distinct("posts.id", ["posts.created_at desc"])
end
def test_columns_for_distinct_few_orders
assert_equal "posts.created_at AS alias_0, posts.position AS alias_1, posts.id",
@conn.columns_for_distinct("posts.id", ["posts.created_at desc", "posts.position asc"])
end
def test_columns_for_distinct_with_case
assert_equal(
"CASE WHEN author.is_active THEN UPPER(author.name) ELSE UPPER(author.email) END AS alias_0, posts.id",
@conn.columns_for_distinct("posts.id",
["CASE WHEN author.is_active THEN UPPER(author.name) ELSE UPPER(author.email) END"])
)
end
def test_columns_for_distinct_blank_not_nil_orders
assert_equal "posts.created_at AS alias_0, posts.id",
@conn.columns_for_distinct("posts.id", ["posts.created_at desc", "", " "])
end
def test_columns_for_distinct_with_arel_order
order = Object.new
def order.to_sql
"posts.created_at desc"
end
assert_equal "posts.created_at AS alias_0, posts.id",
@conn.columns_for_distinct("posts.id", [order])
end
def test_errors_for_bigint_fks_on_integer_pk_table_in_alter_table
# table old_cars has primary key of integer
error = assert_raises(ActiveRecord::MismatchedForeignKey) do
@conn.add_reference :engines, :old_car
@conn.add_foreign_key :engines, :old_cars
end
assert_includes error.message, <<~MSG.squish
Column `old_car_id` on table `engines` does not match column `id` on `old_cars`,
which has type `int(11)`. To resolve this issue, change the type of the `old_car_id`
column on `engines` to be :integer. (For example `t.integer :old_car_id`).
MSG
assert_not_nil error.cause
ensure
@conn.execute("ALTER TABLE engines DROP COLUMN old_car_id") rescue nil
end
def test_errors_for_bigint_fks_on_integer_pk_table_in_create_table
# table old_cars has primary key of integer
error = assert_raises(ActiveRecord::MismatchedForeignKey) do
@conn.execute(<<~SQL)
CREATE TABLE activerecord_unittest.foos (
id bigint NOT NULL AUTO_INCREMENT PRIMARY KEY,
old_car_id bigint,
INDEX index_foos_on_old_car_id (old_car_id),
CONSTRAINT fk_rails_ff771f3c96 FOREIGN KEY (old_car_id) REFERENCES old_cars (id)
)
SQL
end
assert_includes error.message, <<~MSG.squish
Column `old_car_id` on table `foos` does not match column `id` on `old_cars`,
which has type `int(11)`. To resolve this issue, change the type of the `old_car_id`
column on `foos` to be :integer. (For example `t.integer :old_car_id`).
MSG
assert_not_nil error.cause
ensure
@conn.drop_table :foos, if_exists: true
end
def test_errors_for_integer_fks_on_bigint_pk_table_in_create_table
# table old_cars has primary key of bigint
error = assert_raises(ActiveRecord::MismatchedForeignKey) do
@conn.execute(<<~SQL)
CREATE TABLE activerecord_unittest.foos (
id bigint NOT NULL AUTO_INCREMENT PRIMARY KEY,
car_id int,
INDEX index_foos_on_car_id (car_id),
CONSTRAINT fk_rails_ff771f3c96 FOREIGN KEY (car_id) REFERENCES cars (id)
)
SQL
end
assert_includes error.message, <<~MSG.squish
Column `car_id` on table `foos` does not match column `id` on `cars`,
which has type `bigint(20)`. To resolve this issue, change the type of the `car_id`
column on `foos` to be :bigint. (For example `t.bigint :car_id`).
MSG
assert_not_nil error.cause
ensure
@conn.drop_table :foos, if_exists: true
end
def test_errors_for_bigint_fks_on_string_pk_table_in_create_table
# table old_cars has primary key of string
error = assert_raises(ActiveRecord::MismatchedForeignKey) do
@conn.execute(<<~SQL)
CREATE TABLE activerecord_unittest.foos (
id bigint NOT NULL AUTO_INCREMENT PRIMARY KEY,
subscriber_id bigint,
INDEX index_foos_on_subscriber_id (subscriber_id),
CONSTRAINT fk_rails_ff771f3c96 FOREIGN KEY (subscriber_id) REFERENCES subscribers (nick)
)
SQL
end
assert_includes error.message, <<~MSG.squish
Column `subscriber_id` on table `foos` does not match column `nick` on `subscribers`,
which has type `varchar(255)`. To resolve this issue, change the type of the `subscriber_id`
column on `foos` to be :string. (For example `t.string :subscriber_id`).
MSG
assert_not_nil error.cause
ensure
@conn.drop_table :foos, if_exists: true
end
def test_errors_when_an_insert_query_is_called_while_preventing_writes
assert_raises(ActiveRecord::ReadOnlyError) do
@connection_handler.while_preventing_writes do
@conn.insert("INSERT INTO `engines` (`car_id`) VALUES ('138853948594')")
end
end
end
def test_errors_when_an_update_query_is_called_while_preventing_writes
@conn.insert("INSERT INTO `engines` (`car_id`) VALUES ('138853948594')")
assert_raises(ActiveRecord::ReadOnlyError) do
@connection_handler.while_preventing_writes do
@conn.update("UPDATE `engines` SET `engines`.`car_id` = '9989' WHERE `engines`.`car_id` = '138853948594'")
end
end
end
def test_errors_when_a_delete_query_is_called_while_preventing_writes
@conn.execute("INSERT INTO `engines` (`car_id`) VALUES ('138853948594')")
assert_raises(ActiveRecord::ReadOnlyError) do
@connection_handler.while_preventing_writes do
@conn.execute("DELETE FROM `engines` where `engines`.`car_id` = '138853948594'")
end
end
end
def test_errors_when_a_replace_query_is_called_while_preventing_writes
@conn.execute("INSERT INTO `engines` (`car_id`) VALUES ('138853948594')")
assert_raises(ActiveRecord::ReadOnlyError) do
@connection_handler.while_preventing_writes do
@conn.execute("REPLACE INTO `engines` SET `engines`.`car_id` = '249823948'")
end
end
end
def test_doesnt_error_when_a_select_query_is_called_while_preventing_writes
@conn.execute("INSERT INTO `engines` (`car_id`) VALUES ('138853948594')")
@connection_handler.while_preventing_writes do
assert_equal 1, @conn.execute("SELECT `engines`.* FROM `engines` WHERE `engines`.`car_id` = '138853948594'").entries.count
end
end
def test_doesnt_error_when_a_show_query_is_called_while_preventing_writes
@connection_handler.while_preventing_writes do
assert_equal 2, @conn.execute("SHOW FULL FIELDS FROM `engines`").entries.count
end
end
def test_doesnt_error_when_a_set_query_is_called_while_preventing_writes
@connection_handler.while_preventing_writes do
assert_nil @conn.execute("SET NAMES utf8mb4 COLLATE utf8mb4_unicode_ci")
end
end
def test_doesnt_error_when_a_read_query_with_leading_chars_is_called_while_preventing_writes
@conn.execute("INSERT INTO `engines` (`car_id`) VALUES ('138853948594')")
@connection_handler.while_preventing_writes do
assert_equal 1, @conn.execute("(\n( SELECT `engines`.* FROM `engines` WHERE `engines`.`car_id` = '138853948594' ) )").entries.count
end
end
private
def with_example_table(definition = "id int auto_increment primary key, number int, data varchar(255)", &block)
super(@conn, "ex", definition, &block)
end
end
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