Currency model updated

backend/migrations/0003_auto_20180901_1134.py

+# Generated by Django 2.0.3 on 2018-09-01 09:34
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('backend', '0002_auto_20180901_1000'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='currency',
+            old_name='one_USD_in_this_currency',
+            new_name='one_EUR_in_this_currency',
+        ),
+    ]

backend/migrations/0004_auto_20180901_1429.py

+# Generated by Django 2.0.3 on 2018-09-01 12:29
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('backend', '0003_auto_20180901_1134'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='currency',
+            name='symbol',
+            field=models.CharField(blank=True, max_length=30, null=True),
+        ),
+    ]

backend/models/location/currency.py

@@ -7,8 +7,8 @@ from backend.models.my_model import MyModel, MyModelSerializer, MyModelViewSet
 class Currency(MyModel):
     code = models.CharField(primary_key=True, max_length=15)
     name = models.CharField(max_length=100)
-    symbol = models.CharField(max_length=5)
-    one_USD_in_this_currency = models.DecimalField(
+    symbol = models.CharField(null=True, blank=True, max_length=30)
+    one_EUR_in_this_currency = models.DecimalField(
         max_digits=20,
         decimal_places=6,
         validators=[MinValueValidator(0)]