Use CIEmailField for teacher email in order to prevent duplicate email

manuels/migrations/0037_auto_20190627_1905.py

@@ -0,0 +1,25 @@
+# Generated by Django 2.2.2 on 2019-06-27 17:05
+
+import django.contrib.postgres.fields.citext
+from django.contrib.postgres.operations import CITextExtension
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('manuels', '0036_auto_20190615_1114'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='commonsupply',
+            options={'ordering': ('order', 'name'), 'verbose_name': 'fourniture commune', 'verbose_name_plural': 'fournitures communes'},
+        ),
+        CITextExtension(),
+        migrations.AlterField(
+            model_name='teacher',
+            name='email',
+            field=django.contrib.postgres.fields.citext.CIEmailField(help_text='Utilisée pour vous transmettre votre lien personnel', max_length=254, unique=True, verbose_name='adresse email'),
+        ),
+    ]

manuels/models.py

@@ -4,6 +4,7 @@ import re
 import uuid as uuid
 
 from django.conf import settings
+from django.contrib.postgres.fields import CIEmailField
 from django.core.exceptions import ValidationError
 from django.core.mail import EmailMultiAlternatives
 from django.db import models
@@ -43,7 +44,7 @@ class Teacher(BaseModel):
         max_length=10,
         validators=[phone_validator]
     )
-    email = models.EmailField(
+    email = CIEmailField(
         'adresse email',
         help_text='Utilisée pour vous transmettre votre lien personnel',
         unique=True