Company: allowed duplicate names, made email field unique, custom migration

InvenTree/company/migrations/0024_auto_20201012_2238.py

@@ -0,0 +1,30 @@
+from django.db import migrations, models
+
+
+def make_empty_email_field_null(apps, schema_editor):
+    Company = apps.get_model('company', 'Company')
+    for company in Company.objects.all():
+        if company.email == '':
+            company.email = None
+        company.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('company', '0023_auto_20200808_0715'),
+    ]
+
+    operations = [
+        migrations.RunPython(make_empty_email_field_null),
+        migrations.AlterField(
+            model_name='company',
+            name='email',
+            field=models.EmailField(blank=True, help_text='Contact email address', max_length=254, null=True, unique=True, verbose_name='Email'),
+        ),
+        migrations.AlterField(
+            model_name='company',
+            name='name',
+            field=models.CharField(help_text='Company name', max_length=100, verbose_name='Company name'),
+        ),
+    ]