cannot work with default scope

[huobazi]

when use acts_as_paranoid

irb(main):001:0> Topic.all_tags
  (2.8ms)  SELECT tag FROM (SELECT DISTINCT unnest(topics.tags) as tag FROM "topics") subquery WHERE "topics"."deleted_at" IS NULL
Traceback (most recent call last):
        1: from (irb):1
ActiveRecord::StatementInvalid (PG::UndefinedTable: ERROR:  missing FROM-clause entry for table "topics")
LINE 1: ...topics.tags) as tag FROM "topics") subquery WHERE "topics"."...
                                                             ^
: SELECT tag FROM (SELECT DISTINCT unnest(topics.tags) as tag FROM "topics") subquery WHERE "topics"."deleted_at" IS NULL



irb(main):002:0> Topic.unscoped.all_tags
   (3.8ms)  SELECT tag FROM (SELECT DISTINCT unnest(topics.tags) as tag FROM "topics") subquery
=> ["recommend", "adapter",  "emojionearea", "hello", "emojione"]
irb(main):003:0>

[skatkov]

Which gem version are you using?

I had a similar issue in my codebase and I fixed it here:
b23cad3

This should be working for 0.5.1 version.

[huobazi]

@skatkov but, my gem version is 😢

    acts-as-taggable-array-on (0.5.1)

[skatkov]

Based on information you provided, I really have no clue what could be wrong here.

[huobazi]

i reproduce the problem, see the codebase, the Gemfile.lock also uploaded with the commit

run rspec will got many failures via the generated sql ... subquery WHERE "users"."updated_at" IS NULL ...

the full output is here