Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  amureki
 Type:   |   Status:  closed
  Cleanup/optimization   |
Component:  GIS  |  Version:  2.0
 Severity:  Normal   |   Resolution:  fixed
 Keywords:  create extension,| Triage Stage:  Ready for
  postgis, psycopg2, postgresql  |  checkin
Has patch:  1|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by GitHub ):

 * status:  assigned => closed
 * resolution:   => fixed


Comment:

 In [changeset:"8403da3696730f8b9e7d2ad20c920fcd7c52b62c" 8403da36]:
 {{{
 #!CommitTicketReference repository=""
 revision="8403da3696730f8b9e7d2ad20c920fcd7c52b62c"
 Fixed #28975 -- Made PostGIS backend skip extension creation if installed.
 }}}

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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  amureki
 Type:   |   Status:  assigned
  Cleanup/optimization   |
Component:  GIS  |  Version:  2.0
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Ready for
  postgis, psycopg2, postgresql  |  checkin
Has patch:  1|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by Mariusz Felisiak):

 * has_patch:  0 => 1
 * stage:  Accepted => Ready for checkin


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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  amureki
 Type:   |   Status:  assigned
  Cleanup/optimization   |
Component:  GIS  |  Version:  2.0
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Accepted
  postgis, psycopg2, postgresql  |
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-

Comment (by amureki):

 Replying to [comment:16 Mariusz Felisiak]:
 > > Do you mind if I submit a PR and ask for your assistance?
 >
 > Of course not, please do.

 <3

 Not sure, how to modify this ticket to catch the new PR (as there already
 was one that is closed), but here is a link:
 https://github.com/django/django/pull/15941

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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  amureki
 Type:   |   Status:  assigned
  Cleanup/optimization   |
Component:  GIS  |  Version:  2.0
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Accepted
  postgis, psycopg2, postgresql  |
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-

Comment (by Mariusz Felisiak):

 > Do you mind if I submit a PR and ask for your assistance?

 Of course not, please do.

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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  amureki
 Type:   |   Status:  assigned
  Cleanup/optimization   |
Component:  GIS  |  Version:  2.0
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Accepted
  postgis, psycopg2, postgresql  |
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-

Comment (by amureki):

 Replying to [comment:14 Mariusz Felisiak]:
 > Rust, Do you have time to work on this?

 I did prepare a patch. However, I am struggling with the tests a bit.
 Do you mind if I submit a PR and ask for your assistance?

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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  amureki
 Type:   |   Status:  assigned
  Cleanup/optimization   |
Component:  GIS  |  Version:  2.0
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Accepted
  postgis, psycopg2, postgresql  |
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-

Comment (by Mariusz Felisiak):

 Rust, Do you have time to work on this?

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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  amureki
 Type:   |   Status:  assigned
  Cleanup/optimization   |
Component:  GIS  |  Version:  2.0
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Accepted
  postgis, psycopg2, postgresql  |
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by Mariusz Felisiak):

 * owner:  sphrak => amureki
 * status:  new => assigned


Comment:

 Replying to [comment:12 amureki]:
 > As I am also affected by this, I would be happy to introduce a fix for
 that, which would be following Mariusz's suggestion.

 Thanks, feel-free to submit a patch.

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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  sphrak
 Type:   |   Status:  new
  Cleanup/optimization   |
Component:  GIS  |  Version:  2.0
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Accepted
  postgis, psycopg2, postgresql  |
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by amureki):

 * cc: amureki (added)


Comment:

 As I am also affected by this, I would be happy to introduce a fix for
 that, which would be following Mariusz's suggestion.

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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  sphrak
 Type:   |   Status:  new
  Cleanup/optimization   |
Component:  GIS  |  Version:  2.0
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Accepted
  postgis, psycopg2, postgresql  |
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-

Comment (by Mariusz Felisiak):

 Other extensions are needed to unlock various features on some PostgreSQL
 versions. `postgis` is always required for
 `django.contrib.gis.db.backends.postgis`, so IMO it's not the same case.
 We would force all users to manually create a migration with
 `PostGISExtension()` when starting to work with GIS on PostgreSQL. What do
 you think about my [https://code.djangoproject.com/ticket/28975#comment:9
 proposition]?

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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  sphrak
 Type:   |   Status:  new
  Cleanup/optimization   |
Component:  GIS  |  Version:  2.0
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Accepted
  postgis, psycopg2, postgresql  |
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by Johannes Maron):

 * status:  closed => new
 * has_patch:  1 => 0
 * resolution:  worksforme =>
 * needs_tests:  1 => 0


Comment:

 As mentioned in #33885 the current behavior of implicitly creating the PG
 extensions, where all other PG extensions need to be created manually or
 via a migration seems inconsistent.
 Therefore, I'd recommend deprecating the behavior and schedule it for
 deletion in Django 5.

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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  sphrak
 Type:   |   Status:  closed
  Cleanup/optimization   |
Component:  GIS  |  Version:  2.0
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,|  worksforme
  postgis, psycopg2, postgresql  | Triage Stage:  Accepted
Has patch:  1|  Needs documentation:  0
  Needs tests:  1|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-

Comment (by Mariusz Felisiak):

 #33885 was a duplicate. Maybe we should skip creation 樂, if not needed,
 as we did for `CreationExtension()` operation in
 d693a086def21d843c03ec3f5b5e697ed2463d45.

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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  sphrak
 Type:   |   Status:  closed
  Cleanup/optimization   |
Component:  GIS  |  Version:  2.0
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,|  worksforme
  postgis, psycopg2, postgresql  | Triage Stage:  Accepted
Has patch:  1|  Needs documentation:  0
  Needs tests:  1|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by Tim Graham):

 * status:  assigned => closed
 * component:  Database layer (models, ORM) => GIS
 * resolution:   => worksforme


Comment:

 As Shai said on the mailing list, `CREATE EXTENSION IF NOT EXISTS
 postgis;` doesn't seem to fail if the extension already exists, even if
 the user isn't a superuser. I see `NOTICE:  extension "postgis" already
 exists, skipping` in this case.  Unless I'm misunderstanding the original
 report, I don't see a need to make any changes.

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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  sphrak
 Type:   |   Status:  assigned
  Cleanup/optimization   |
Component:  Database layer   |  Version:  2.0
  (models, ORM)  |
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Accepted
  postgis, psycopg2, postgresql  |
Has patch:  1|  Needs documentation:  0
  Needs tests:  1|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-

Comment (by sphrak):

 This issue is currently stalled while waiting on response here:
 https://groups.google.com/forum/#!topic/django-developers/EjouxahkqUc


 Replying to [ticket:28975 sphrak]:
 > Hello,
 > I have found an issue with the documentation and/or the behaivor of the
 postgis extension create method.
 >
 > **Background**
 > I am trying to migrate my app that uses the postgis extension inside a
 docker container. I do create the extension beforehand as superuser since
 I dont intend to run the database connection as a postgres superuser.
 >
 > **Problem**
 > As per the documentation found here:
 https://docs.djangoproject.com/en/2.0/ref/contrib/gis/install/postgis/
 >
 >
 > I find it confusing that the documentation states "The command is run
 during the migrate process." and "An alternative is to use a migration
 operation in your project:". Because what seems to be the problem is that
 even if you remove the create extension statement from the migration file,
 it still runs regardless - rendering the option to put the create
 extension statement inside the migration file somewhat redundant and
 probably not very useful.
 >
 > **Possible solution**
 > Ideally the behaivor would be only create extension if its in a
 migration file and if its not - its the users concern to create it however
 it see fit.
 >
 > The relevant part is this:
 > {{{
 > testing.api |   File "/usr/lib/python3.6/site-
 packages/django/contrib/gis/db/backends/postgis/base.py", line 26, in
 prepare_database
 > testing.api | cursor.execute("CREATE EXTENSION IF NOT EXISTS
 postgis")
 > }}}
 >
 > Full trace:
 > {{{
 > testing.api | POSTGRES: I'm still down. Standby.
 > testing.api |   List of databases
 > testing.api |Name|  Owner   | Encoding | Collate |  Ctype  |
 Access privileges
 > testing.api |
 ---+--+--+-+-+---
 > testing.api |  postgres  | postgres | UTF8 | C   | C.UTF-8 |
 > testing.api |  template0 | postgres | UTF8 | C   | C.UTF-8 |
 =c/postgres  +
 > testing.api ||  |  | | |
 postgres=CTc/postgres
 > testing.api |  template1 | postgres | UTF8 | C   | C.UTF-8 |
 =c/postgres  +
 > testing.api ||  |  | | |
 postgres=CTc/postgres
 > testing.api |  testing   | postgres | UTF8 | C   | C.UTF-8 |
 =Tc/postgres +
 > testing.api ||  |  | | |
 postgres=CTc/postgres+
 > testing.api ||  |  | | |
 testing=CTc/postgres
 > testing.api | (4 rows)
 > testing.api |
 > testing.api | POSTGRES: I'm up, I'm up, I'm f* up - but I'm up
 > testing.api | Collecting selenium==3.3.1 (from -r
 /app/src/core/requirements/testing.txt (line 1))
 > testing.api |   Downloading selenium-3.3.1-py2.py3-none-any.whl (930kB)
 > testing.api | Collecting django-debug-toolbar==1.8 (from -r
 /app/src/core/requirements/testing.txt (line 2))
 > testing.api |   Downloading django_debug_toolbar-1.8-py2.py3-none-
 any.whl (205kB)
 > testing.api | Requirement already satisfied: Django>=1.8 in
 /usr/lib/python3.6/site-packages (from django-debug-toolbar==1.8->-r
 /app/src/core/requirements/testing.txt (line 2))
 > testing.api | Collecting sqlparse>=0.2.0 (from django-debug-
 toolbar==1.8->-r /app/src/core/requirements/testing.txt (line 2))
 > testing.api |   Downloading sqlparse-0.2.4-py2.py3-none-any.whl
 > testing.api | Requirement already satisfied: pytz in /usr/lib/python3.6
 /site-packages (from Django>=1.8->django-debug-toolbar==1.8->-r
 /app/src/core/requirements/testing.txt (line 2))
 > testing.api | Installing collected packages: selenium, sqlparse, django-
 debug-toolbar
 > testing.api | Successfully installed django-debug-toolbar-1.8
 selenium-3.3.1 sqlparse-0.2.4
 > testing.api | Traceback (most recent call last):
 > testing.api |   File "/usr/lib/python3.6/site-
 packages/django/db/backends/utils.py", line 83, in _execute
 > 

Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  sphrak
 Type:   |   Status:  assigned
  Cleanup/optimization   |
Component:  Database layer   |  Version:  2.0
  (models, ORM)  |
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Accepted
  postgis, psycopg2, postgresql  |
Has patch:  1|  Needs documentation:  0
  Needs tests:  1|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by sphrak):

 * has_patch:  0 => 1
 * needs_tests:  0 => 1


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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  sphrak
 Type:   |   Status:  assigned
  Cleanup/optimization   |
Component:  Database layer   |  Version:  2.0
  (models, ORM)  |
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Accepted
  postgis, psycopg2, postgresql  |
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-

Comment (by Ramiro Morales):

 I think the issue reported isn't that creation of the extension must be
 skipped if it already exist (as I think that's what the  `IF NOT EXISTS
 postgis` part of `CREATE EXTENSION IF NOT EXISTS postgis` is about) But
 rather that the query is tried unconditionally.

 I'd vote for removing the automatic creation of the postgis extension from
 `postgis backend DatabaseWrapper.prepare_databse()` we added in 1.8 and
 move to having users to perform it explicitly either:

 - Manually, externally -- For cases like the OP describes
 - Via a migration -- For cases in which the user Django connects to
 Postgres as has DB superuser rights there as it's assumed

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Re: [Django] #28975: Skip automatic creation of postgis extension if it already exists (was: Postgis create extension runs regardless if in migration file or not)

[Django]

#28975: Skip automatic creation of postgis extension if it already exists
-+-
 Reporter:  sphrak   |Owner:  sphrak
 Type:   |   Status:  assigned
  Cleanup/optimization   |
Component:  Database layer   |  Version:  2.0
  (models, ORM)  |
 Severity:  Normal   |   Resolution:
 Keywords:  create extension,| Triage Stage:  Accepted
  postgis, psycopg2, postgresql  |
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by Tim Graham):

 * type:  Bug => Cleanup/optimization
 * stage:  Unreviewed => Accepted


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Ticket URL: 
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