Make it possible to save draft message without to_recipient, subject

apimail/api/serializers/composed_message.py

@@ -42,6 +42,16 @@ class ComposedMessageSerializer(serializers.ModelSerializer):
     def get_from_email(self, obj):
         return obj.from_account.email
 
+    def validate(self, data):
+        if data['status'] != ComposedMessage.STATUS_DRAFT:
+            if not data['to_recipient']:
+                raise serializers.ValidationError(
+                    "to_recipient cannot be empty if message is not a draft")
+            if not data['subject']:
+                raise serializers.ValidationError(
+                    "Subject cannot be empty if message is not a draft")
+        return data
+
     def create(self, validated_data):
         attachment_uuids = validated_data.pop('attachment_uuids')
         cm = super().create(validated_data)

apimail/migrations/0028_auto_20201027_2047.py

+# Generated by Django 2.2.16 on 2020-10-27 19:47
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('apimail', '0027_addressbookentry'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='composedmessage',
+            name='subject',
+            field=models.CharField(blank=True, max_length=256),
+        ),
+        migrations.AlterField(
+            model_name='composedmessage',
+            name='to_recipient',
+            field=models.EmailField(blank=True, max_length=254),
+        ),
+    ]

apimail/models/composed_message.py

@@ -50,7 +50,7 @@ class ComposedMessage(models.Model):
         'apimail.EmailAccount',
         on_delete=models.PROTECT)
 
-    to_recipient = models.EmailField()
+    to_recipient = models.EmailField(blank=True)
 
     cc_recipients = ArrayField(
         models.EmailField(),
@@ -60,7 +60,9 @@ class ComposedMessage(models.Model):
         models.EmailField(),
         blank=True, null=True)
 
-    subject = models.CharField(max_length=256)
+    subject = models.CharField(
+        max_length=256,
+        blank=True)
 
     body_text = models.TextField(blank=True)
     body_html = models.TextField(blank=True)