Add migration

courses/migrations/0002_workspace.py

+# Generated by Django 2.2.5 on 2019-09-20 20:01
+
+import autoslug.fields
+import django.contrib.postgres.fields
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('auth', '0011_update_proxy_permissions'),
+        ('courses', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Workspace',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=255, verbose_name='Name')),
+                ('description', models.TextField(blank=True, help_text='Enter the contract description (optional)', verbose_name='description')),
+                ('slug', autoslug.fields.AutoSlugField(editable=False, max_length=128, populate_from='name', unique=True, verbose_name='Slug')),
+                ('unities', django.contrib.postgres.fields.ArrayField(base_field=models.CharField(blank=True, max_length=255), help_text='Possibly cities. This field stores the user declared unities on contract creation. This are used to distinguish some special grupos associated to the contract', size=None)),
+                ('classes', models.ManyToManyField(related_name='contract', to='courses.Class')),
+                ('groups', models.ManyToManyField(blank=True, help_text='Groups created to enforce this contract restrictions in several other models', related_name='contract', to='auth.Group', verbose_name='groups')),
+            ],
+            options={
+                'verbose_name': 'Contract',
+                'verbose_name_plural': 'Contracts',
+            },
+        ),
+    ]