merchant text field -> vendor dropdown field (will delete your merchant)

expenses/admin.py

@@ -12,7 +12,7 @@ from django.db import models
 from util import next_payday
 
 from .admin_base import AdminBase, DeletedListFilter, DeletableAdminForm
-from .models import Expense, ExpenseCategory, Timesheet, TimesheetRate
+from .models import Expense, ExpenseCategory, Timesheet, TimesheetRate, Vendor
 from django import forms
 from django.utils import timezone
 from django.contrib.admin.widgets import AdminDateWidget, AdminSplitDateTime
@@ -23,6 +23,21 @@ from admincharts.utils import months_between_dates
 from djmoney.contrib.exchange.models import convert_money
 
 
+class VendorAdminForm(DeletableAdminForm):
+    class Meta:
+        model = Vendor
+        fields = "__all__"
+
+
+@admin.register(Vendor)
+class VendorAdmin(AdminBase):
+    list_display = (
+        "name",
+        "description",
+    )
+    form = VendorAdminForm
+
+
 class TimesheetRateAdminForm(DeletableAdminForm):
     class Meta:
         model = TimesheetRate
@@ -169,8 +184,8 @@ class ExpenseAdminForm(DeletableAdminForm):
 class ExpenseAdmin(AdminBase, AdminChartMixin, ImportExportModelAdmin):
     form = ExpenseAdminForm
 
-    list_display = ("date", "price", "description", "category")
-    list_filter = ("date", ("deleted", DeletedListFilter), "category")
+    list_display = ("date", "price", "description", "category", "vendor")
+    list_filter = ("date", ("deleted", DeletedListFilter), "category", "vendor")
     ordering = ("-date", "-deleted")
     readonly_fields = ("deleted",)
 

expenses/migrations/0004_vendor_remove_expense_merchant_and_more.py

@@ -0,0 +1,68 @@
+# Generated by Django 4.2.5 on 2023-09-21 04:31
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import simple_history.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('expenses', '0003_remove_expensecategory_default_rate_and_more'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Vendor',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('deleted', models.BooleanField(default=False)),
+                ('name', models.TextField(blank=True)),
+                ('description', models.TextField(blank=True)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+        migrations.RemoveField(
+            model_name='expense',
+            name='merchant',
+        ),
+        migrations.RemoveField(
+            model_name='historicalexpense',
+            name='merchant',
+        ),
+        migrations.CreateModel(
+            name='HistoricalVendor',
+            fields=[
+                ('id', models.BigIntegerField(auto_created=True, blank=True, db_index=True, verbose_name='ID')),
+                ('deleted', models.BooleanField(default=False)),
+                ('name', models.TextField(blank=True)),
+                ('description', models.TextField(blank=True)),
+                ('history_id', models.AutoField(primary_key=True, serialize=False)),
+                ('history_date', models.DateTimeField(db_index=True)),
+                ('history_change_reason', models.CharField(max_length=100, null=True)),
+                ('history_type', models.CharField(choices=[('+', 'Created'), ('~', 'Changed'), ('-', 'Deleted')], max_length=1)),
+                ('history_user', models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'historical vendor',
+                'verbose_name_plural': 'historical vendors',
+                'ordering': ('-history_date', '-history_id'),
+                'get_latest_by': ('history_date', 'history_id'),
+            },
+            bases=(simple_history.models.HistoricalChanges, models.Model),
+        ),
+        migrations.AddField(
+            model_name='expense',
+            name='vendor',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='expenses', to='expenses.vendor'),
+        ),
+        migrations.AddField(
+            model_name='historicalexpense',
+            name='vendor',
+            field=models.ForeignKey(blank=True, db_constraint=False, null=True, on_delete=django.db.models.deletion.DO_NOTHING, related_name='+', to='expenses.vendor'),
+        ),
+    ]

expenses/models.py

@@ -108,6 +108,14 @@ class ExpenseCategory(DeletableModel):
         return truncate_string(self.name, 48)
 
 
+class Vendor(DeletableModel):
+    name = models.TextField(blank=True)
+    description = models.TextField(blank=True)
+
+    def __str__(self):
+        return truncate_string(self.name, 48)
+
+
 class Expense(DeletableModel):
     price = MoneyField(
         decimal_places=3,
@@ -117,7 +125,13 @@ class Expense(DeletableModel):
     )
     date = models.DateField()
     description = models.TextField(blank=True)
-    merchant = models.CharField(max_length=255, blank=True)
+    vendor = models.ForeignKey(
+        Vendor,
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
+        related_name="expenses",
+    )
     receipt = models.FileField(upload_to="receipts/", blank=True)
     link = models.URLField(blank=True)
     category = models.ForeignKey(