Add automatic category sorting

nummi/main/migrations/0004_alter_category_options_category_full_name.py

@@ -0,0 +1,23 @@
+# Generated by Django 4.0.4 on 2022-05-20 14:17
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0003_category_parent_alter_category_name'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='category',
+            options={'ordering': ['-parent_id', 'name']},
+        ),
+        migrations.AddField(
+            model_name='category',
+            name='full_name',
+            field=models.CharField(default='', max_length=512),
+            preserve_default=False,
+        ),
+    ]

nummi/main/migrations/0005_alter_category_full_name.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.0.4 on 2022-05-20 14:18
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0004_alter_category_options_category_full_name'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='category',
+            name='full_name',
+            field=models.CharField(default='', editable=False, max_length=512),
+        ),
+    ]

nummi/main/models.py

@@ -6,10 +6,21 @@ from django.forms import ModelForm
 class Category(models.Model):
     id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
     name = models.CharField(max_length=64)
+    full_name = models.CharField(max_length=512, editable=False, default="")
     parent = models.ForeignKey("self", on_delete=models.SET_NULL, blank=True, null=True)
 
     def __str__(self):
-        return self.name
+        if self.parent is None: return self.name
+        return f"{self.parent}>{self.name}"
+
+    def save(self, *args, **kwargs):
+        self.full_name = str(self)
+        super().save(*args, **kwargs)
+        for child in self.__class__.objects.filter(parent=self):
+            child.save()
+
+    class Meta:
+        ordering = ['full_name']
 
 
 class Transaction(models.Model):

nummi/main/views.py

@@ -9,14 +9,14 @@ from .models import Transaction, TransactionForm, Invoice, InvoiceForm, Category
 @login_required
 def index(request):
     _transactions = Transaction.objects.order_by("-date")[:5]
-    _categories = Category.objects.filter(parent=None).order_by("name")
+    _categories = Category.objects.filter(parent=None)
 
     def _cat_list(cat):
         children = []
         for child in Category.objects.filter(parent=cat):
             children += _cat_list(child)
-        if len(children) == 0: return cat, 
+        if len(children) == 0: return cat.name, 
-        return cat, children
+        return cat.name, children
 
     _cats = []
     for cat in _categories: