postgresql - Rails 测试：模型在添加索引后转储
问题描述
我正在使用 Ruby 2.6.3、Rails 6.0.2.2 和 Postgres 12 开发一个 ruby 应用程序。
一切都运行良好，直到我使用迁移向表添加索引：
class AddIndexToUserEmail < ActiveRecord::Migration[6.0]
def change
add_index :users, :email, unique: true
end
end
运行rails test:models返回以下无限转储，我无法摆脱。
任何帮助将不胜感激
% rails test:models
Run options: --seed 62890
# Running:
Traceback (most recent call last):
20: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:68:in `block in autorun'
19: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:138:in `run'
18: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `start'
17: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `map'
16: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `each'
15: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `times'
14: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `block in start'
13: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `fork'
12: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:95:in `block (2 levels) in start'
11: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1138:in `method_missing'
10: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1158:in `with_friend'
9: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1139:in `block in method_missing'
8: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1227:in `open'
7: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1140:in `block (2 levels) in method_missing'
6: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1251:in `send_message'
5: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:929:in `send_request'
4: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `send_request'
3: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `each'
2: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:611:in `block in send_request'
1: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:565:in `dump'
/Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:565:in `dump': no _dump_data is defined for class PG::Connection (TypeError)
25: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:68:in `block in autorun'
24: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:138:in `run'
23: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `start'
22: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `map'
21: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `each'
20: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `times'
19: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `block in start'
18: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `fork'
17: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:95:in `block (2 levels) in start'
16: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1138:in `method_missing'
15: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1158:in `with_friend'
14: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1139:in `block in method_missing'
13: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1227:in `open'
12: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1140:in `block (2 levels) in method_missing'
11: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1251:in `send_message'
10: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:929:in `send_request'
9: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `send_request'
8: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `each'
7: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:611:in `block in send_request'
6: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:564:in `dump'
5: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:567:in `rescue in dump'
4: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:650:in `make_proxy'
3: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:650:in `new'
2: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1101:in `initialize'
1: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1807:in `to_id'
/Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1738:in `current_server': DRb::DRbServerNotFound (DRb::DRbServerNotFound)
25: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:68:in `block in autorun'
24: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:138:in `run'
23: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `start'
22: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `map'
21: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `each'
20: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `times'
19: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `block in start'
18: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `fork'
17: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:95:in `block (2 levels) in start'
16: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1138:in `method_missing'
15: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1158:in `with_friend'
14: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1139:in `block in method_missing'
13: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1227:in `open'
12: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1140:in `block (2 levels) in method_missing'
11: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1251:in `send_message'
10: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:929:in `send_request'
9: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `send_request'
8: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `each'
7: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:611:in `block in send_request'
6: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:564:in `dump'
5: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:567:in `rescue in dump'
4: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:650:in `make_proxy'
3: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:650:in `new'
2: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1101:in `initialize'
1: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1807:in `to_id'
/Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1738:in `current_server': DRb::DRbServerNotFound (DRb::DRbConnError)
11: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:68:in `block in autorun'
10: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:138:in `run'
9: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `start'
8: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `map'
7: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `each'
6: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `times'
5: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `block in start'
4: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `fork'
3: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:94:in `block (2 levels) in start'
2: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:97:in `rescue in block (2 levels) in start'
1: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:97:in `each'
/Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:98:in `block (3 levels) in start': undefined method `exception=' for #<Minitest::UnexpectedError: Unexpected exception> (NoMethodError)
Did you mean? exception
Traceback (most recent call last):
Traceback (most recent call last):
20: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:68:in `block in autorun'
19: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:138:in `run'
18: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `start'
17: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `map'
16: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `each'
15: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `times'
14: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `block in start'
20: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:68:in `block in autorun'
13: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `fork'
19: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:138:in `run'
12: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:95:in `block (2 levels) in start'
18: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `start'
17: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `map'
11: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1138:in `method_missing'
16: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `each'
10: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1158:in `with_friend'
15: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `times'
9: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1139:in `block in method_missing'
14: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `block in start'
8: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1227:in `open'
13: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `fork'
7: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1140:in `block (2 levels) in method_missing'
12: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:95:in `block (2 levels) in start'
6: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1251:in `send_message'
5: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:929:in `send_request'
4: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `send_request'
3: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `each'
2: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:611:in `block in send_request'
11: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1138:in `method_missing'
1: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:565:in `dump'
/Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:565:in `dump' 10: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.: 0/drb/drb.rb:1158:in `with_friend'
9: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1139:in `block in method_missing'
no _dump_data is defined for class PG::Connection ( 8: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1227:in `open'
TypeError 7: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1140:in `block (2 levels) in method_missing'
6: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1251:in `send_message'
) 5: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:929:in `send_request'
4: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `send_request'
25: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:68:in `block in autorun'
3: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `each'
24: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:138:in `run'
2: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:611:in `block in send_request'
1: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:565:in `dump'
/Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:565:in `dump': 23: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `start'
no _dump_data is defined for class PG::Connection ( 22: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `map'
TypeError 21: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `each'
)
20: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `times'
25: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:68:in `block in autorun'
19: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `block in start'
18: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `fork'
17: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:95:in `block (2 levels) in start'
16: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1138:in `method_missing'
24: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:138:in `run'
15: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1158:in `with_friend'
14: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1139:in `block in method_missing'
13: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1227:in `open'
12: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1140:in `block (2 levels) in method_missing'
23: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `start'
11: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1251:in `send_message'
10: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:929:in `send_request'
9: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `send_request'
8: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `each'
22: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `map'
7: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:611:in `block in send_request'
21: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `each'
6: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:564:in `dump'
20: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `times'
5: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:567:in `rescue in dump'
19: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `block in start'
4: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:650:in `make_proxy'
18: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `fork'
3: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/ 17: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:95:in `block (2 levels) in start'
2.6.0/drb/drb.rb:650:in `new'
16: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1138:in `method_missing'
15: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1158:in `with_friend'
14: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1139:in `block in method_missing'
13: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1227:in `open'
2: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1101:in `initialize'
12: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1140:in `block (2 levels) in method_missing'
11: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1251:in `send_message'
1: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1807:in `to_id'
10: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:929:in `send_request'
/Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1738:in `current_server': DRb::DRbServerNotFound 9: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `send_request'
( 8: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `each'
DRb::DRbServerNotFound 7: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:611:in `block in send_request'
) 6: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:564:in `dump'
5: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:567:in `rescue in dump'
4: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:650:in `make_proxy'
25: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:68:in `block in autorun'
3: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:650:in `new'
24: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:138:in `run'
2: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1101:in `initialize'
1: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1807:in `to_id'
/Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1738:in `current_server': 23: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `start'
DRb::DRbServerNotFound ( 22: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `map'
DRb::DRbServerNotFound 21: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `each'
) 20: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `times'
19: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `block in start'
18: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `fork'
17: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:95:in `block (2 levels) in start'
16: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1138:in `method_missing'
15: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1158:in `with_friend'
14: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1139:in `block in method_missing'
13: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1227:in `open'
12: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1140:in `block (2 levels) in method_missing'
25: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:68:in `block in autorun'
11: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1251:in `send_message'
10: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:929:in `send_request'
24: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:138:in `run'
9: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `send_request'
23: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `start'
8: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `each'
22: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelizat 7: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:611:in `block in send_request'
ion.rb:74:in `map'
21: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `each'
6: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:564:in `dump'
20: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `times'
5: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:567:in `rescue in dump'
19: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `block in start'
4: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:650:in `make_proxy'
18: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:75:in `fork'
3: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:650:in `new'
2: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1101:in `initialize'
17: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:95:in `block (2 levels) in start'
1: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1807:in `to_id'
/Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1738:in `current_server' 16: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1138:in `method_missing'
: 15: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1158:in `with_friend'
DRb::DRbServerNotFound (DRb::DRbConnError 14: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1139:in `block in method_missing'
)
11: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:68:in `block in autorun'
13: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1227:in `open'
12: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1140:in `block (2 levels) in method_missing'
10: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/minitest-5.14.0/lib/minitest.rb:138:in `run'
11: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:1251:in `send_message'
9: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `start'
10: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:929:in `send_request'
8: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `map'
9: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `send_request'
7: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `each'
8: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:610:in `each'
6: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.2.2/lib/active_support/testing/parallelization.rb:74:in `times'
7: from /Users/pdipietro/.rbenv/versions/2.6.3/lib/ruby/2.6.0/drb/drb.rb:611:in `block in send_request'
... more dump existed but limited to 30000 characters
解决方案
这个问题是由于最后一个 minitest 版本（5.14）。他们已在 rails 中修复了该问题，但尚未发布修复程序
打开你的 gemfile 并明确设置你的 minitest 版本：
gem 'minitest', '<=5.13'
然后运行bundle update minitest。然后它将在错误消息中向您显示数据库的真正问题。
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