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require 'cases/helper'
require 'support/ddl_helper'
require 'support/schema_dumping_helper'
if ActiveRecord::Base.connection.supports_foreign_keys?
module ActiveRecord
class Migration
class ForeignKeyTest < ActiveRecord::TestCase
include DdlHelper
include SchemaDumpingHelper
class Rocket < ActiveRecord::Base
end
class Astronaut < ActiveRecord::Base
end
setup do
@connection = ActiveRecord::Base.connection
@connection.create_table "rockets" do |t|
t.string :name
end
@connection.create_table "astronauts" do |t|
t.string :name
t.references :rocket
end
end
teardown do
if defined?(@connection)
@connection.execute "DROP TABLE IF EXISTS astronauts"
@connection.execute "DROP TABLE IF EXISTS rockets"
end
end
def test_foreign_keys
foreign_keys = @connection.foreign_keys("fk_test_has_fk")
assert_equal 1, foreign_keys.size
fk = foreign_keys.first
assert_equal "fk_test_has_fk", fk.from_table
assert_equal "fk_test_has_pk", fk.to_table
assert_equal "fk_id", fk.column
assert_equal "id", fk.primary_key
assert_equal "fk_name", fk.name
end
def test_add_foreign_key_inferes_column
@connection.add_foreign_key :astronauts, :rockets
foreign_keys = @connection.foreign_keys("astronauts")
assert_equal 1, foreign_keys.size
fk = foreign_keys.first
assert_equal "astronauts", fk.from_table
assert_equal "rockets", fk.to_table
assert_equal "rocket_id", fk.column
assert_equal "id", fk.primary_key
assert_equal "astronauts_rocket_id_fk", fk.name
end
def test_add_foreign_key_with_column
@connection.add_foreign_key :astronauts, :rockets, column: "rocket_id"
foreign_keys = @connection.foreign_keys("astronauts")
assert_equal 1, foreign_keys.size
fk = foreign_keys.first
assert_equal "astronauts", fk.from_table
assert_equal "rockets", fk.to_table
assert_equal "rocket_id", fk.column
assert_equal "id", fk.primary_key
assert_equal "astronauts_rocket_id_fk", fk.name
end
def test_add_foreign_key_with_non_standard_primary_key
with_example_table @connection, "space_shuttles", "pk integer PRIMARY KEY" do
@connection.add_foreign_key(:astronauts, :space_shuttles,
column: "rocket_id", primary_key: "pk", name: "custom_pk")
foreign_keys = @connection.foreign_keys("astronauts")
assert_equal 1, foreign_keys.size
fk = foreign_keys.first
assert_equal "astronauts", fk.from_table
assert_equal "space_shuttles", fk.to_table
assert_equal "pk", fk.primary_key
@connection.remove_foreign_key :astronauts, name: "custom_pk"
end
end
def test_add_on_delete_restrict_foreign_key
@connection.add_foreign_key :astronauts, :rockets, column: "rocket_id", on_delete: :restrict
foreign_keys = @connection.foreign_keys("astronauts")
assert_equal 1, foreign_keys.size
fk = foreign_keys.first
if current_adapter?(:MysqlAdapter, :Mysql2Adapter)
# ON DELETE RESTRICT is the default on MySQL
assert_equal nil, fk.on_delete
else
assert_equal :restrict, fk.on_delete
end
end
def test_add_on_delete_cascade_foreign_key
@connection.add_foreign_key :astronauts, :rockets, column: "rocket_id", on_delete: :cascade
foreign_keys = @connection.foreign_keys("astronauts")
assert_equal 1, foreign_keys.size
fk = foreign_keys.first
assert_equal :cascade, fk.on_delete
end
def test_add_on_delete_nullify_foreign_key
@connection.add_foreign_key :astronauts, :rockets, column: "rocket_id", on_delete: :nullify
foreign_keys = @connection.foreign_keys("astronauts")
assert_equal 1, foreign_keys.size
fk = foreign_keys.first
assert_equal :nullify, fk.on_delete
end
def test_remove_foreign_key_inferes_column
@connection.add_foreign_key :astronauts, :rockets
assert_equal 1, @connection.foreign_keys("astronauts").size
@connection.remove_foreign_key :astronauts, :rockets
assert_equal [], @connection.foreign_keys("astronauts")
end
def test_remove_foreign_key_by_column
@connection.add_foreign_key :astronauts, :rockets, column: "rocket_id"
assert_equal 1, @connection.foreign_keys("astronauts").size
@connection.remove_foreign_key :astronauts, column: "rocket_id"
assert_equal [], @connection.foreign_keys("astronauts")
end
def test_remove_foreign_key_by_name
@connection.add_foreign_key :astronauts, :rockets, column: "rocket_id", name: "fancy_named_fk"
assert_equal 1, @connection.foreign_keys("astronauts").size
@connection.remove_foreign_key :astronauts, name: "fancy_named_fk"
assert_equal [], @connection.foreign_keys("astronauts")
end
def test_schema_dumping
output = dump_table_schema "fk_test_has_fk"
assert_match %r{\s+add_foreign_key "fk_test_has_fk", "fk_test_has_pk", column: "fk_id", primary_key: "id", name: "fk_name"$}, output
end
def test_schema_dumping_on_delete_option
@connection.add_foreign_key :astronauts, :rockets, column: "rocket_id", on_delete: :nullify
output = dump_table_schema "astronauts"
assert_match %r{\s+add_foreign_key "astronauts",.+on_delete: :nullify$}, output
end
class CreateCitiesAndHousesMigration < ActiveRecord::Migration
def change
create_table("cities") { |t| }
create_table("houses") do |t|
t.column :city_id, :integer
end
add_foreign_key :houses, :cities, column: "city_id"
end
end
def test_add_foreign_key_is_reversible
migration = CreateCitiesAndHousesMigration.new
silence_stream($stdout) { migration.migrate(:up) }
assert_equal ["houses_city_id_fk"], @connection.foreign_keys("houses").map(&:name)
ensure
silence_stream($stdout) { migration.migrate(:down) }
end
end
end
end
end
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