feat: Add User Activity Model for Course Goals AA-903

lms/djangoapps/course_goals/migrations/0005_useractivity.py

+# Generated by Django 2.2.24 on 2021-08-13 17:02
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import opaque_keys.edx.django.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('course_goals', '0004_auto_20210806_0137'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='UserActivity',
+            fields=[
+                ('id', models.BigAutoField(primary_key=True, serialize=False)),
+                ('course_key', opaque_keys.edx.django.models.CourseKeyField(max_length=255)),
+                ('date', models.DateField()),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+        migrations.AddIndex(
+            model_name='useractivity',
+            index=models.Index(fields=['user', 'course_key'], name='user_course_index'),
+        ),
+        migrations.AddConstraint(
+            model_name='useractivity',
+            constraint=models.UniqueConstraint(fields=('user', 'course_key', 'date'), name='unique_user_course_date'),
+        ),
+    ]

lms/djangoapps/course_goals/models.py

@@ -28,10 +28,10 @@ class CourseGoal(models.Model):
     .. no_pii:
     """
     class Meta:
-        app_label = "course_goals"
-        unique_together = ("user", "course_key")
+        app_label = 'course_goals'
+        unique_together = ('user', 'course_key')
 
-    user = models.ForeignKey(User, blank=False, on_delete=models.CASCADE)
+    user = models.ForeignKey(User, on_delete=models.CASCADE)
     course_key = CourseKeyField(max_length=255, db_index=True)
     # The goal a user has set for the number of days they want to learn per week
     days_per_week = models.PositiveIntegerField(default=0)
@@ -46,3 +46,24 @@ class CourseGoal(models.Model):
             goal=self.days_per_week,
             course=self.course_key,
         )
+
+
+class UserActivity(models.Model):
+    """
+    Tracks the date a user performs an activity in a course for goal purposes.
+    To be used in conjunction with the CourseGoal model to establish if a learner is hitting
+    their desired days_per_week.
+
+    To start, this model will only be tracking page views that count towards a learner's goal,
+    but could grow to tracking other types of goal achieving activities in the future.
+
+    .. no_pii:
+    """
+    class Meta:
+        constraints = [models.UniqueConstraint(fields=['user', 'course_key', 'date'], name='unique_user_course_date')]
+        indexes = [models.Index(fields=['user', 'course_key'], name='user_course_index')]
+
+    id = models.BigAutoField(primary_key=True)
+    user = models.ForeignKey(User, on_delete=models.CASCADE)
+    course_key = CourseKeyField(max_length=255)
+    date = models.DateField()