Db idx and on_delete for foreignkeys

contest/migrations/0009_auto_20170123_0139.py

@@ -0,0 +1,76 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.5 on 2017-01-23 01:39
+from __future__ import unicode_literals
+
+import django.core.validators
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('contest', '0008_auto_20170119_1202'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='contest',
+            name='callQrg',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='contest.Frequency'),
+        ),
+        migrations.AlterField(
+            model_name='frequency',
+            name='note',
+            field=models.CharField(blank=True, max_length=50),
+        ),
+        migrations.AlterField(
+            model_name='qso',
+            name='call',
+            field=models.CharField(db_index=True, max_length=20),
+        ),
+        migrations.AlterField(
+            model_name='qso',
+            name='otherNo',
+            field=models.IntegerField(verbose_name='Nr-R'),
+        ),
+        migrations.AlterField(
+            model_name='qso',
+            name='ownNo',
+            field=models.IntegerField(verbose_name='Nr-S'),
+        ),
+        migrations.AlterField(
+            model_name='qso',
+            name='ref',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='contest.Reference'),
+        ),
+        migrations.AlterField(
+            model_name='qso',
+            name='refStr',
+            field=models.CharField(max_length=20, verbose_name='EXC'),
+        ),
+        migrations.AlterField(
+            model_name='qso',
+            name='reportRX',
+            field=models.CharField(default=59, max_length=7, validators=[django.core.validators.RegexValidator('[1-5][1-9]')], verbose_name='RST-R'),
+        ),
+        migrations.AlterField(
+            model_name='qso',
+            name='reportTX',
+            field=models.CharField(default=59, max_length=7, validators=[django.core.validators.RegexValidator('[1-5][1-9]')], verbose_name='RST-S'),
+        ),
+        migrations.AlterField(
+            model_name='reference',
+            name='name',
+            field=models.CharField(db_index=True, max_length=20, unique=True),
+        ),
+        migrations.AlterField(
+            model_name='user',
+            name='ref',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='contest.Reference'),
+        ),
+        migrations.AlterIndexTogether(
+            name='qso',
+            index_together=set([('owner', 'call')]),
+        ),
+    ]

contest/models.py

@@ -9,20 +9,20 @@ from .validators import CallUsernameValidator
 class Contest(models.Model):
 	name = models.CharField(max_length=20)
 	shortName = models.CharField(max_length=20, unique=True)
-	callQrg = models.ForeignKey("Frequency", null=True, blank=True)
+	callQrg = models.ForeignKey("Frequency", models.SET_NULL, null=True, blank=True)
 
 	def __str__(self):
 		return self.name
 
 class Reference(models.Model):
-	name = models.CharField(max_length=20, unique=True)
+	name = models.CharField(max_length=20, unique=True, db_index=True)
 	description = models.TextField()
 
 	def __str__(self):
 		return self.name
 
 class User(AbstractUser):
-	ref = models.ForeignKey(Reference, null=True, blank=True)
+	ref = models.ForeignKey(Reference, models.SET_NULL,null=True, blank=True)
 
 	def __init__(self, *args, **kwargs):
 		super(User, self).__init__(*args, **kwargs)
@@ -50,13 +50,16 @@ class Frequency(models.Model):
 class QSO(models.Model):
 	reportValidator = RegexValidator("[1-5][1-9]")
 
-	owner = models.ForeignKey(User)
+	class Meta:
+		index_together = [
+			["owner", "call"],
+		]
+
+	owner = models.ForeignKey(User, db_index=True)
 	time = models.DateTimeField(blank=True)
-	call = models.CharField(max_length=20)
+	call = models.CharField(max_length=20, db_index=True)
 	band = models.ForeignKey(Band)
 
-
-
 	reportTX = models.CharField(max_length=7, default=59, verbose_name='RST-S', validators=[reportValidator])
 	reportRX = models.CharField(max_length=7, default=59, verbose_name='RST-R', validators=[reportValidator])
 
@@ -64,7 +67,7 @@ class QSO(models.Model):
 	otherNo = models.IntegerField(verbose_name='Nr-R')
 
 	refStr = models.CharField(max_length=20, verbose_name="EXC")
-	ref = models.ForeignKey(Reference, null=True, blank=True)
+	ref = models.ForeignKey(Reference, models.SET_NULL, null=True, blank=True)
 
 	remarks = models.CharField(max_length=50, blank=True)