add support for DATABASE_SEARCH_PATH

[ruslandoga]

Changes

This PR adds support for custom PostgreSQL search_path as requested in #3799

• I'll need to check if this approach is good enough.

Tests

• Automated tests have been added

Changelog

• Entry has been added to changelog

Documentation

• Docs have been updated

Dark mode

• This PR does not change the UI

[Nikola-Milovic]

Any ETA for the release this would be included in?

[ruslandoga]

@plausible/developers any advice on how to test this? :)

[ruslandoga]

@Nikola-Milovic could you please verify that the approach in #3799 (reply in thread) worked?

[Nikola-Milovic]

@ruslandoga Pretty much working

postgres=# \dn
   List of schemas
   Name    |  Owner
-----------+----------
 plausible | postgres
 public    | postgres
(2 rows)

postgres=# \d
                List of relations
 Schema |       Name       |   Type   |  Owner
--------+------------------+----------+----------
 public | oban_jobs        | table    | postgres
 public | oban_jobs_id_seq | sequence | postgres
 public | oban_peers       | table    | postgres
(3 rows)

postgres=# set schema 'plausible';
SET
postgres=# \d
                          List of relations
  Schema   |               Name                |   Type   |  Owner
-----------+-----------------------------------+----------+----------
 plausible | api_keys                          | table    | postgres
 plausible | api_keys_id_seq                   | sequence | postgres
 plausible | check_stats_emails                | table    | postgres
 plausible | check_stats_emails_id_seq         | sequence | postgres
 plausible | create_site_emails                | table    | postgres
 plausible | create_site_emails_id_seq         | sequence | postgres
 plausible | custom_domains                    | table    | postgres
 plausible | custom_domains_id_seq             | sequence | postgres
 plausible | email_verification_codes          | table    | postgres
 plausible | enterprise_plans                  | table    | postgres
 plausible | enterprise_plans_id_seq           | sequence | postgres
 plausible | feedback_emails                   | table    | postgres
 plausible | feedback_emails_id_seq            | sequence | postgres
 plausible | fun_with_flags_toggles            | table    | postgres
 plausible | fun_with_flags_toggles_id_seq     | sequence | postgres
 plausible | goals                             | table    | postgres
 plausible | goals_id_seq                      | sequence | postgres
 plausible | google_auth                       | table    | postgres
 plausible | google_auth_id_seq                | sequence | postgres
 plausible | intro_emails                      | table    | postgres
 plausible | intro_emails_id_seq               | sequence | postgres
 plausible | invitations                       | table    | postgres
 plausible | invitations_id_seq                | sequence | postgres
 plausible | monthly_reports                   | table    | postgres
 plausible | monthly_reports_id_seq            | sequence | postgres
postgres=# \d

The oban library seems to still put its schemas into public

Demo https://github.com/Nikola-Milovic/plausible-schema-demo

docker compose up should just work

[ruslandoga]

There have been some changes since v2.0.0 that make it harder to support this env var, please see Nikola-Milovic/plausible-schema-demo#1 (comment)

Since the current PR is not going to solve the root issue anyway (due to failing migrations), I'm going to close it. Sorry!