new applets app for cross-board usage of Applet() & UserApplet() models; dashboard migrations reset and apps reseeded w. new default specs; core.settings & many tests thru-out suite updated accordingly

src/apps/applets/admin.py

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+from django.contrib import admin
+
+from apps.applets.models import Applet, UserApplet
+
+
+@admin.register(Applet)
+class AppletAdmin(admin.ModelAdmin):
+    list_display = ['slug', 'name', 'default_visible', 'grid_cols', 'grid_rows']
+    list_editable = ['grid_cols', 'grid_rows']
+
+admin.site.register(UserApplet)

src/apps/applets/apps.py

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+from django.apps import AppConfig
+
+
+class AppletsConfig(AppConfig):
+    name = 'apps.applets'

src/apps/applets/migrations/0001_initial.py

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+import django.db.models.deletion
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    initial = True
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Applet',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('slug', models.SlugField(unique=True)),
+                ('name', models.CharField(max_length=100)),
+                ('context', models.CharField(choices=[('dashboard', 'Dashboard'), ('gameboard', 'Gameboard')], default='dashboard', max_length=20)),
+                ('default_visible', models.BooleanField(default=True)),
+                ('grid_cols', models.PositiveSmallIntegerField(default=12)),
+                ('grid_rows', models.PositiveSmallIntegerField(default=3)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='UserApplet',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('visible', models.BooleanField(default=True)),
+                ('applet', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='applets.applet')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='user_applets', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={'unique_together': {('user', 'applet')}},
+        ),
+    ]

src/apps/applets/migrations/0002_seed_applets.py

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+from django.db import migrations
+
+
+def seed_applets(apps, schema_editor):
+    Applet = apps.get_model('applets', 'Applet')
+    for slug, name, cols, rows, context in [
+        ('wallet', 'Wallet', 12, 3, 'dashboard'),
+        ('new-list', 'New List', 9, 3, 'dashboard'),
+        ('my-lists', 'My Lists', 3, 3, 'dashboard'),
+        ('username', 'Username', 6, 3, 'dashboard'),
+        ('palette', 'Palette', 6, 3, 'dashboard'),
+        ('new-game', 'New Game', 4, 2, 'gameboard'),
+        ('my-games', 'My Games', 4, 4, 'gameboard'),
+        ('game-kit', 'Game Kit', 4, 2, 'gameboard'),
+    ]:
+        Applet.objects.get_or_create(
+            slug=slug,
+            defaults={'name': name, 'grid_cols': cols, 'grid_rows': rows, 'context': context},
+        )
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('applets', '0001_initial')
+    ]
+
+    operations = [
+        migrations.RunPython(seed_applets, migrations.RunPython.noop)
+    ]

src/apps/applets/models.py

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+from django.db import models
+
+class Applet(models.Model):
+    DASHBOARD = "dashboard"
+    GAMEBOARD = "gameboard"
+    CONTEXT_CHOICES = [
+        (DASHBOARD, "Dashboard"),
+        (GAMEBOARD, "Gameboard"),
+    ]
+
+    slug = models.SlugField(unique=True)
+    name = models.CharField(max_length=100)
+    context = models.CharField(max_length=20, choices=CONTEXT_CHOICES, default=DASHBOARD)
+    default_visible = models.BooleanField(default=True)
+    grid_cols = models.PositiveSmallIntegerField(default=12)
+    grid_rows = models.PositiveSmallIntegerField(default=3)
+
+    def __str__(self):
+        return self.name
+    
+class UserApplet(models.Model):
+    user = models.ForeignKey(
+        "lyric.User",
+        related_name="user_applets",
+        on_delete=models.CASCADE,
+    )
+    applet = models.ForeignKey(
+        Applet,
+        on_delete=models.CASCADE,
+    )
+    visible = models.BooleanField(default=True)
+
+    class Meta:
+        unique_together = ("user", "applet")

src/apps/applets/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

src/apps/applets/tests/integrated/test_models.py

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+from django.db.utils import IntegrityError
+from django.test import TestCase
+
+from apps.applets.models import Applet, UserApplet
+from apps.lyric.models import User
+
+
+class AppletModelTest(TestCase):
+    def setUp(self):
+        self.applet = Applet.objects.create(
+            slug="my-applet", name="My Applet", default_visible=True
+        )
+
+    def test_applet_can_be_created(self):
+        self.assertEqual(Applet.objects.get(slug="my-applet"), self.applet)
+
+    def test_applet_slug_is_unique(self):
+        with self.assertRaises(IntegrityError):
+            Applet.objects.create(slug="my-applet", name="Second")
+
+    def test_applet_str(self):
+        self.assertEqual(str(self.applet), "My Applet")
+
+    def test_applet_grid_defaults(self):
+        self.assertEqual(self.applet.grid_cols, 12)
+        self.assertEqual(self.applet.grid_rows, 3)
+
+class UserAppletModelTest(TestCase):
+    def setUp(self):
+        self.user = User.objects.create(email="a@b.cde")
+        self.applet, _ = Applet.objects.get_or_create(slug="username", defaults={"name": "Username"})
+
+    def test_user_applet_links_user_to_applet(self):
+        ua = UserApplet.objects.create(user=self.user, applet=self.applet, visible=True)
+        self.assertIn(ua, self.user.user_applets.all())
+
+    def test_user_applet_unique_per_user_and_applet(self):
+        UserApplet.objects.create(user=self.user, applet=self.applet, visible=True)
+        with self.assertRaises(IntegrityError):
+            UserApplet.objects.create(user=self.user, applet=self.applet, visible=False)

src/apps/applets/views.py

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+from django.shortcuts import render
+
+# Create your views here.