add tags to guides

studyguides/apps/courses/migrations/0004_auto_20201015_1929.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.1.2 on 2020-10-15 23:29
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('courses', '0003_course_url'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='subject',
+            name='courses',
+            field=models.ManyToManyField(blank=True, null=True, related_name='subject', to='courses.Course'),
+        ),
+    ]

studyguides/apps/courses/migrations/0005_auto_20201020_1737.py

@@ -0,0 +1,30 @@
+# Generated by Django 3.1.2 on 2020-10-20 21:37
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('courses', '0004_auto_20201015_1929'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Tag',
+            fields=[
+                ('id', models.AutoField(primary_key=True, serialize=False)),
+                ('name', models.SlugField(max_length=100, unique=True, validators=[django.core.validators.RegexValidator(message='Only lowercase alphanumeric, dashes, and underscores allowed', regex='^[a-z0-9_\\-]+$')])),
+            ],
+        ),
+        migrations.RemoveField(
+            model_name='guide',
+            name='teacher',
+        ),
+        migrations.AddField(
+            model_name='guide',
+            name='tags',
+            field=models.ManyToManyField(null=True, to='courses.Tag'),
+        ),
+    ]

studyguides/apps/courses/models.py

@@ -8,7 +8,7 @@ class Subject(models.Model):
     url = models.CharField("URL", max_length=20, unique=True, validators=[RegexValidator(
         regex="^[a-zA-Z0-9_\-]+$", message="Only alphanumeric, dashes, and underscores allowed")])
 
-    courses = models.ManyToManyField("Course", related_name="subject")
+    courses = models.ManyToManyField("Course", related_name="subject", null=True, blank=True)
 
     def __str__(self):
         return self.name
@@ -27,10 +27,15 @@ class Course(models.Model):
 class Guide(models.Model):
     id = models.AutoField(primary_key=True)
     name = models.CharField(max_length=100)
-    teacher = models.CharField(max_length=100, blank=True)
 
+    tags = models.ManyToManyField("Tag", null=True)
     course = models.ForeignKey(Course, on_delete=models.CASCADE, null=True)
     url = models.URLField(max_length=300)
 
     def __str__(self):
         return f"[{self.course or 'N/A'}{(', ' + self.teacher) if self.teacher else ''}] {self.name}"
+
+class Tag(models.Model):
+    id = models.AutoField(primary_key=True)
+    name = models.SlugField(max_length=100, unique=True, validators=[RegexValidator(
+        regex="^[a-z0-9_\-]+$", message="Only lowercase alphanumeric, dashes, and underscores allowed")])

studyguides/studyguides/apps/courses/migrations/0002_auto_20201015_0934.py

@@ -1,23 +0,0 @@
-# Generated by Django 3.1.2 on 2020-10-15 13:34
-
-from django.db import migrations, models
-import django.db.models.deletion
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('courses', '0001_initial'),
-    ]
-
-    operations = [
-        migrations.RemoveField(
-            model_name='course',
-            name='units',
-        ),
-        migrations.AddField(
-            model_name='guide',
-            name='course',
-            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='courses.course'),
-        ),
-    ]