Allow NULLable fields to be blank

Several fields in the Student model were allowed to be NULL, but were
still required to be non-blank in the admin interface.

This commit updates the model so that all fields in the Student model
which have null=True also have blank=True

dreamjub/migrations/0004_auto_20171029_1427.py

@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.6 on 2017-10-29 14:27
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('dreamjub', '0003_auto_20161204_2258'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='student',
+            name='building',
+            field=models.CharField(blank=True, max_length=255, null=True),
+        ),
+        migrations.AlterField(
+            model_name='student',
+            name='college',
+            field=models.CharField(blank=True, choices=[('Krupp', 'Krupp College'), ('Mercator', 'Mercator College'), ('C3', 'College III'), ('Nordmetall', 'College Nordmetall')], max_length=255, null=True),
+        ),
+        migrations.AlterField(
+            model_name='student',
+            name='country',
+            field=models.TextField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='student',
+            name='degree',
+            field=models.CharField(blank=True, choices=[('Bachelor of Science', 'Bachelor of Science'), ('Bachelor of Art', 'Bachelor of Art'), ('Master of Science', 'Master of Science'), ('Master of Art', 'Master of Art'), ('PhD', 'PhD')], max_length=255, null=True),
+        ),
+        migrations.AlterField(
+            model_name='student',
+            name='majorShort',
+            field=models.CharField(blank=True, max_length=255, null=True),
+        ),
+        migrations.AlterField(
+            model_name='student',
+            name='picture',
+            field=models.ImageField(blank=True, null=True, upload_to='faces/%Y/%m/%d/'),
+        ),
+        migrations.AlterField(
+            model_name='student',
+            name='status',
+            field=models.CharField(blank=True, choices=[('foundation-year', 'Foundation Year'), ('medprep', 'Medprep'), ('undergrad', 'Undergraduate'), ('master', 'Master'), ('phd-integrated', 'integrated PhD'), ('phd', 'PhD'), ('winter', 'Winter School Student'), ('guest', 'Guest Student')], max_length=255, null=True),
+        ),
+        migrations.AlterField(
+            model_name='student',
+            name='year',
+            field=models.PositiveIntegerField(blank=True, null=True),
+        ),
+    ]

dreamjub/models.py

@@ -31,8 +31,9 @@ def fullName(self):
         return '%s %s' % (self.firstName, self.lastName)
 
     # Colorfoul Info
-    country = models.TextField(null=True)  #: Country of origin
-    picture = models.ImageField(null=True, upload_to='faces/%Y/%m/%d/')  #:
+    country = models.TextField(blank=True, null=True)  #: Country of origin
+    picture = models.ImageField(blank=True, null=True,
+                                upload_to='faces/%Y/%m/%d/')  #:
     # Picture (if available)
 
     # College Contact Info
@@ -45,13 +46,13 @@ def fullName(self):
         (MERCATOR, 'Mercator College'),
         (COLLEGE_III, 'College III'),
         (COLLEGE_NORDMETALL, 'College Nordmetall')
-    ), null=True, max_length=255)
+    ), blank=True, null=True, max_length=255)
 
     # Physical contact information
     phone = models.TextField(blank=True, null=True)
     isCampusPhone = models.BooleanField(default=False)
     room = models.TextField(blank=True, null=True)
-    building = models.CharField(null=True, max_length=255)
+    building = models.CharField(blank=True, null=True, max_length=255)
 
     # Types of people
     isStudent = models.BooleanField()
@@ -78,7 +79,7 @@ def fullName(self):
 
         (WINTER, 'Winter School Student'),
         (GUEST, 'Guest Student')
-    ), null=True, max_length=255)  #: current student status
+    ), blank=True, null=True, max_length=255)  #: current student status
 
     #: Degree Status
     BACHELOR_OF_SCIENCE = 'Bachelor of Science'
@@ -94,12 +95,12 @@ def fullName(self):
         (MASTER_OF_ART, 'Master of Art'),
 
         (PHD_DEGREE, 'PhD')
-    ), null=True, max_length=255)
+    ), blank=True, null=True, max_length=255)
 
     # year and major
     year = models.PositiveIntegerField(
-        null=True)  #: (Last known) year of Graduation
-    majorShort = models.CharField(null=True, max_length=255)
+        blank=True, null=True)  #: (Last known) year of Graduation
+    majorShort = models.CharField(blank=True, null=True, max_length=255)
 
     # TODO: Fill this
     MAJOR_NAMES_MAP = {