From 8df3b4dec64b1a121d43531c509af33c98244b3d Mon Sep 17 00:00:00 2001
From: Michael Romashov <mromashov@icloud.com>
Date: Wed, 10 Mar 2021 15:25:24 -0500
Subject: [PATCH] Fixed 'database is locked' error.

---
 apps/tmu/jobs.py      | 18 +++++++++---------
 zhu_core/scheduler.py | 16 ++++++++--------
 zhu_core/settings.py  |  3 +++
 3 files changed, 20 insertions(+), 17 deletions(-)

diff --git a/apps/tmu/jobs.py b/apps/tmu/jobs.py
index bdf9ea2..dec6839 100644
--- a/apps/tmu/jobs.py
+++ b/apps/tmu/jobs.py
@@ -32,14 +32,14 @@ def fetch_metars():
     for airport in airports_icao:
         url = 'https://avwx.rest/api/metar/' + airport + '?format=json&onfail=cache'
         resp = requests.get(url, headers=headers)
-
         data = resp.json()
 
-        METAR.objects.update_or_create(
-            station=data.get('station'),
-            defaults={
-                'raw': data.get('sanitized'),
-                'flight_rules': data.get('flight_rules'),
-                'timestamp': pytz.utc.localize(datetime.fromisoformat(data.get('time').get('dt')[:-1])),
-            }
-        )
+        query = METAR.objects.filter(station=airport)
+        if query.exists():
+            query.delete()
+
+        METAR(
+            raw=data.get('sanitized'),
+            flight_rules=data.get('flight_rules'),
+            timestamp=pytz.utc.localize(datetime.fromisoformat(data.get('time').get('dt')[:-1])),
+        ).save()
diff --git a/zhu_core/scheduler.py b/zhu_core/scheduler.py
index d223131..d15db1e 100644
--- a/zhu_core/scheduler.py
+++ b/zhu_core/scheduler.py
@@ -19,7 +19,7 @@ def start_scheduler():
 
     scheduler.add_job(
         users.sync_vatusa_roster,
-        trigger=CronTrigger(minute=0),  # Top of every hour
+        trigger=CronTrigger(minute=1),  # Top of every hour + 1
         id='sync_vatusa_roster',
         max_instances=1,
         replace_existing=True,
@@ -27,24 +27,24 @@ def start_scheduler():
 
     scheduler.add_job(
         users.update_user_ratings,
-        trigger=CronTrigger(minute=0),  # Top of every hour
+        trigger=CronTrigger(minute=2),  # Top of every hour + 2
         id='update_user_ratings',
         max_instances=1,
         replace_existing=True,
     )
 
     scheduler.add_job(
-        tmu.delete_inactive_atis,
-        trigger=CronTrigger(minute=0),  # Top of every hour
-        id='delete_inactive_atis',
+        tmu.fetch_metars,
+        trigger=CronTrigger(minute=3),  # Top of every hour + 3
+        id='fetch_metars',
         max_instances=1,
         replace_existing=True,
     )
 
     scheduler.add_job(
-        tmu.fetch_metars,
-        trigger=CronTrigger(minute=0),  # Top of every hour
-        id='fetch_metars',
+        tmu.delete_inactive_atis,
+        trigger=CronTrigger(minute=4),  # Top of every hour + 4
+        id='delete_inactive_atis',
         max_instances=1,
         replace_existing=True,
     )
diff --git a/zhu_core/settings.py b/zhu_core/settings.py
index 0512032..67ab90e 100644
--- a/zhu_core/settings.py
+++ b/zhu_core/settings.py
@@ -151,6 +151,9 @@
     'default': {
         'ENGINE': 'django.db.backends.sqlite3',
         'NAME': BASE_DIR / 'db.sqlite3',
+        'OPTIONS': {
+            'timeout': 20,
+        }
     }
 }