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require "cases/helper"
require 'support/schema_dumping_helper'
class PostgresqlArrayTest < ActiveRecord::TestCase
include SchemaDumpingHelper
include InTimeZone
OID = ActiveRecord::ConnectionAdapters::PostgreSQL::OID
class PgArray < ActiveRecord::Base
self.table_name = 'pg_arrays'
end
def setup
@connection = ActiveRecord::Base.connection
enable_extension!('hstore', @connection)
@connection.transaction do
@connection.create_table('pg_arrays') do |t|
t.string 'tags', array: true
t.integer 'ratings', array: true
t.datetime :datetimes, array: true
t.hstore :hstores, array: true
end
end
@column = PgArray.columns_hash['tags']
@type = PgArray.type_for_attribute("tags")
end
teardown do
@connection.execute 'drop table if exists pg_arrays'
disable_extension!('hstore', @connection)
end
def test_column
assert_equal :string, @column.type
assert_equal "character varying", @column.sql_type
assert @column.array?
assert_not @type.binary?
ratings_column = PgArray.columns_hash['ratings']
assert_equal :integer, ratings_column.type
type = PgArray.type_for_attribute("ratings")
assert ratings_column.array?
end
def test_default
@connection.add_column 'pg_arrays', 'score', :integer, array: true, default: [4, 4, 2]
PgArray.reset_column_information
assert_equal([4, 4, 2], PgArray.column_defaults['score'])
assert_equal([4, 4, 2], PgArray.new.score)
ensure
PgArray.reset_column_information
end
def test_default_strings
@connection.add_column 'pg_arrays', 'names', :string, array: true, default: ["foo", "bar"]
PgArray.reset_column_information
assert_equal(["foo", "bar"], PgArray.column_defaults['names'])
assert_equal(["foo", "bar"], PgArray.new.names)
ensure
PgArray.reset_column_information
end
def test_change_column_with_array
@connection.add_column :pg_arrays, :snippets, :string, array: true, default: []
@connection.change_column :pg_arrays, :snippets, :text, array: true, default: []
PgArray.reset_column_information
column = PgArray.columns_hash['snippets']
assert_equal :text, column.type
assert_equal [], PgArray.column_defaults['snippets']
assert column.array?
end
def test_change_column_cant_make_non_array_column_to_array
@connection.add_column :pg_arrays, :a_string, :string
assert_raises ActiveRecord::StatementInvalid do
@connection.transaction do
@connection.change_column :pg_arrays, :a_string, :string, array: true
end
end
end
def test_change_column_default_with_array
@connection.change_column_default :pg_arrays, :tags, []
PgArray.reset_column_information
assert_equal [], PgArray.column_defaults['tags']
end
def test_type_cast_array
assert_equal(['1', '2', '3'], @type.type_cast_from_database('{1,2,3}'))
assert_equal([], @type.type_cast_from_database('{}'))
assert_equal([nil], @type.type_cast_from_database('{NULL}'))
end
def test_type_cast_integers
x = PgArray.new(ratings: ['1', '2'])
assert_equal([1, 2], x.ratings)
x.save!
x.reload
assert_equal([1, 2], x.ratings)
end
def test_schema_dump_with_shorthand
output = dump_table_schema "pg_arrays"
assert_match %r[t\.string\s+"tags",\s+array: true], output
assert_match %r[t\.integer\s+"ratings",\s+array: true], output
end
def test_select_with_strings
@connection.execute "insert into pg_arrays (tags) VALUES ('{1,2,3}')"
x = PgArray.first
assert_equal(['1','2','3'], x.tags)
end
def test_rewrite_with_strings
@connection.execute "insert into pg_arrays (tags) VALUES ('{1,2,3}')"
x = PgArray.first
x.tags = ['1','2','3','4']
x.save!
assert_equal ['1','2','3','4'], x.reload.tags
end
def test_select_with_integers
@connection.execute "insert into pg_arrays (ratings) VALUES ('{1,2,3}')"
x = PgArray.first
assert_equal([1, 2, 3], x.ratings)
end
def test_rewrite_with_integers
@connection.execute "insert into pg_arrays (ratings) VALUES ('{1,2,3}')"
x = PgArray.first
x.ratings = [2, '3', 4]
x.save!
assert_equal [2, 3, 4], x.reload.ratings
end
def test_multi_dimensional_with_strings
assert_cycle(:tags, [[['1'], ['2']], [['2'], ['3']]])
end
def test_with_empty_strings
assert_cycle(:tags, [ '1', '2', '', '4', '', '5' ])
end
def test_with_multi_dimensional_empty_strings
assert_cycle(:tags, [[['1', '2'], ['', '4'], ['', '5']]])
end
def test_with_arbitrary_whitespace
assert_cycle(:tags, [[['1', '2'], [' ', '4'], [' ', '5']]])
end
def test_multi_dimensional_with_integers
assert_cycle(:ratings, [[[1], [7]], [[8], [10]]])
end
def test_strings_with_quotes
assert_cycle(:tags, ['this has','some "s that need to be escaped"'])
end
def test_strings_with_commas
assert_cycle(:tags, ['this,has','many,values'])
end
def test_strings_with_array_delimiters
assert_cycle(:tags, ['{','}'])
end
def test_strings_with_null_strings
assert_cycle(:tags, ['NULL','NULL'])
end
def test_contains_nils
assert_cycle(:tags, ['1',nil,nil])
end
def test_insert_fixture
tag_values = ["val1", "val2", "val3_with_'_multiple_quote_'_chars"]
@connection.insert_fixture({"tags" => tag_values}, "pg_arrays" )
assert_equal(PgArray.last.tags, tag_values)
end
def test_attribute_for_inspect_for_array_field
record = PgArray.new { |a| a.ratings = (1..11).to_a }
assert_equal("[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ...]", record.attribute_for_inspect(:ratings))
end
def test_escaping
unknown = 'foo\\",bar,baz,\\'
tags = ["hello_#{unknown}"]
ar = PgArray.create!(tags: tags)
ar.reload
assert_equal tags, ar.tags
end
def test_string_quoting_rules_match_pg_behavior
tags = ["", "one{", "two}", %(three"), "four\\", "five ", "six\t", "seven\n", "eight,", "nine", "ten\r", "NULL"]
x = PgArray.create!(tags: tags)
x.reload
assert_equal x.tags_before_type_cast, PgArray.type_for_attribute('tags').type_cast_for_database(tags)
end
def test_quoting_non_standard_delimiters
strings = ["hello,", "world;"]
comma_delim = OID::Array.new(ActiveRecord::Type::String.new, ',')
semicolon_delim = OID::Array.new(ActiveRecord::Type::String.new, ';')
assert_equal %({"hello,",world;}), comma_delim.type_cast_for_database(strings)
assert_equal %({hello,;"world;"}), semicolon_delim.type_cast_for_database(strings)
end
def test_mutate_array
x = PgArray.create!(tags: %w(one two))
x.tags << "three"
x.save!
x.reload
assert_equal %w(one two three), x.tags
assert_not x.changed?
end
def test_mutate_value_in_array
x = PgArray.create!(hstores: [{ a: 'a' }, { b: 'b' }])
x.hstores.first['a'] = 'c'
x.save!
x.reload
assert_equal [{ 'a' => 'c' }, { 'b' => 'b' }], x.hstores
assert_not x.changed?
end
def test_datetime_with_timezone_awareness
tz = "Pacific Time (US & Canada)"
in_time_zone tz do
PgArray.reset_column_information
time_string = Time.current.to_s
time = Time.zone.parse(time_string)
record = PgArray.new(datetimes: [time_string])
assert_equal [time], record.datetimes
assert_equal ActiveSupport::TimeZone[tz], record.datetimes.first.time_zone
record.save!
record.reload
assert_equal [time], record.datetimes
assert_equal ActiveSupport::TimeZone[tz], record.datetimes.first.time_zone
end
end
def test_assigning_non_array_value
record = PgArray.new(tags: "not-an-array")
assert_equal [], record.tags
assert_equal "not-an-array", record.tags_before_type_cast
assert record.save
assert_equal record.tags, record.reload.tags
end
def test_assigning_empty_string
record = PgArray.new(tags: "")
assert_equal [], record.tags
assert_equal "", record.tags_before_type_cast
assert record.save
assert_equal record.tags, record.reload.tags
end
def test_assigning_valid_pg_array_literal
record = PgArray.new(tags: "{1,2,3}")
assert_equal ["1", "2", "3"], record.tags
assert_equal "{1,2,3}", record.tags_before_type_cast
assert record.save
assert_equal record.tags, record.reload.tags
end
def test_uniqueness_validation
klass = Class.new(PgArray) do
validates_uniqueness_of :tags
def self.model_name; ActiveModel::Name.new(PgArray) end
end
e1 = klass.create("tags" => ["black", "blue"])
assert e1.persisted?, "Saving e1"
e2 = klass.create("tags" => ["black", "blue"])
assert !e2.persisted?, "e2 shouldn't be valid"
assert e2.errors[:tags].any?, "Should have errors for tags"
assert_equal ["has already been taken"], e2.errors[:tags], "Should have uniqueness message for tags"
end
private
def assert_cycle field, array
# test creation
x = PgArray.create!(field => array)
x.reload
assert_equal(array, x.public_send(field))
# test updating
x = PgArray.create!(field => [])
x.public_send("#{field}=", array)
x.save!
x.reload
assert_equal(array, x.public_send(field))
end
end
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