Move ltree create statement out of migrations

Author: daisylb

.circleci/config.yml

@@ -35,7 +35,7 @@ jobs:
           name: Installing top-level dependencies
           command: |
             export PATH=~/.local/bin:$PATH
-            pip install --user tox poetry
+            pip install --user tox poetry psycopg2-binary
       - run:
           name: Waiting for Postgres to start up
           command: |
@@ -46,6 +46,27 @@ jobs:
               sleep 1
             done
             echo Failed waiting for Postgres && exit 1
+      - run:
+          name: Creating Postgres database and ltree extension
+          command: |
+            python -c "
+            import psycopg2, os
+            from psycopg2.extensions import ISOLATION_LEVEL_AUTOCOMMIT
+
+            def getcur(dbname):
+              conn = psycopg2.connect(
+                dbname=dbname,
+                host=os.environ['PG_HOST'],
+                user=os.environ['PG_USER'],
+                password=os.environ['PG_PASSWORD'],
+              )
+              conn.set_isolation_level(ISOLATION_LEVEL_AUTOCOMMIT)
+              return conn.cursor()
+
+            cur = getcur('postgres')
+            cur.execute('CREATE DATABASE \"django-pgtree-test\"')
+            cur = getcur('django-pgtree-test')
+            cur.execute('CREATE EXTENSION ltree')"
       - run:
           name: Running tests
           command: |

testproject/settings.py

@@ -37,9 +37,6 @@
     "django.contrib.sessions",
     "django.contrib.messages",
     "django.contrib.staticfiles",
-    # In this case we're creating the ltree extension in a migration,
-    # so it needs to come before django_pgtree (which does a CREATE
-    # FUNCTION that uses ltree in its migrations)
     "testproject.testapp",
     "django_pgtree",
 ]
@@ -84,6 +81,7 @@
         "HOST": os.environ.get("PG_HOST", ""),
         "USER": os.environ.get("PG_USER", ""),
         "PASSWORD": os.environ.get("PG_PASSWORD", ""),
+        "TEST": {"TEMPLATE": "template1", "NAME": "django-pgtree-test"},
     }
 }
 

testproject/testapp/migrations/0001_initial.py

@@ -12,9 +12,6 @@ class Migration(migrations.Migration):
     dependencies = []
 
     operations = [
-        migrations.RunSQL(
-            "CREATE EXTENSION IF NOT EXISTS ltree", migrations.RunSQL.noop
-        ),
         migrations.CreateModel(
             name="TestModel",
             fields=[