add longer fields to custom user

pandora/app/monkey_patch.py

@@ -13,10 +13,17 @@ config.init()
 
 NEW_LENGTH = {
     'username': 255,
-    'email': 255,
+    'email': 254,
     'password': 255,
 }
 
+def monkey_patch_groupname():
+    f = Group._meta.get_field('name')
+    f.max_length = 255
+    for v in f.validators:
+        if isinstance(v, MaxLengthValidator):
+            v.limit_value = 255
+
 def monkey_patch_username():
     for field in NEW_LENGTH:
         f = User._meta.get_field(field)
@@ -24,11 +31,22 @@ def monkey_patch_username():
         for v in f.validators:
             if isinstance(v, MaxLengthValidator):
                 v.limit_value = NEW_LENGTH[field]
+    monkey_patch_groupname()
+
+def apply_patch():
+    from django.db import connection, transaction
+    cursor = connection.cursor()
+    table = connection.introspection.get_table_description(cursor, Group._meta.db_table)
+    sql = []
+    for row in table:
+        if row.name == 'name' and row.internal_size != 255:
+            sql.append('ALTER TABLE "%s" ALTER "%s" TYPE varchar(%d)' % (
+                Group._meta.db_table, row.name, 255)
+            )
+    for q in sql:
+        cursor.execute(q)
+    if sql:
+        transaction.commit()
 
-    f = Group._meta.get_field('name')
-    f.max_length = 255
-    for v in f.validators:
-        if isinstance(v, MaxLengthValidator):
-            v.limit_value = 255
 
 monkey_patch_username()

pandora/item/management/commands/sqlfindindex.py

@@ -30,6 +30,8 @@ class Command(BaseCommand):
                 print(sql)
             cursor.execute(sql)
 
+        app.monkey_patch.apply_patch()
+
         if settings.DB_GIN_TRGM:
             import entity.models
             import document.models

pandora/system/migrations/0003_field_length.py

@@ -0,0 +1,24 @@
+# Generated by Django 3.0.6 on 2020-05-30 10:10
+
+import django.contrib.auth.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('system', '0002_rename_user_table'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='user',
+            name='email',
+            field=models.EmailField(blank=True, max_length=254, verbose_name='email address'),
+        ),
+        migrations.AlterField(
+            model_name='user',
+            name='username',
+            field=models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 255 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=255, unique=True, validators=[django.contrib.auth.validators.UnicodeUsernameValidator()], verbose_name='username'),
+        ),
+    ]

pandora/system/models.py

@@ -1,6 +1,19 @@
 from django.db import models
 from django.contrib.auth.models import AbstractUser
+from django.utils.translation import ugettext_lazy as _
 
 
 class User(AbstractUser):
-    pass
+
+    password = models.CharField(_('password'), max_length=255)
+    username = models.CharField(
+        _('username'),
+        max_length=255,
+        unique=True,
+        help_text=_('Required. 255 characters or fewer. Letters, digits and @/./+/-/_ only.'),
+        validators=[AbstractUser.username_validator],
+        error_messages={
+            'unique': _("A user with that username already exists."),
+        },
+    )
+    last_name = models.CharField(_('last name'), max_length=150, blank=True)