static data for Courses

db/migrations/000048_seed_default_courses.down.sql

@@ -0,0 +1,3 @@
+DELETE FROM courses
+WHERE description = 'Default CEFR level course (system seed).'
+  AND name IN ('A1', 'A2', 'B1', 'B2', 'C1', 'C2');

db/migrations/000048_seed_default_courses.up.sql

@@ -0,0 +1,18 @@
+-- Default CEFR-style course names per program (custom courses can still be created via the API with any name).
+-- Matches hierarchy note on courses: CEFR labels A1..C2, plus ad-hoc names allowed.
+INSERT INTO courses (program_id, name, description, thumbnail)
+SELECT
+    p.id,
+    v.name,
+    'Default CEFR level course (system seed).',
+    NULL
+FROM programs AS p
+CROSS JOIN (
+    VALUES
+        ('A1'),
+        ('A2'),
+        ('B1'),
+        ('B2'),
+        ('C1'),
+        ('C2')
+) AS v (name);

internal/domain/course.go

@@ -2,7 +2,11 @@ package domain
 
 import "time"
 
-// Course belongs to a Program (e.g. A1, A2, … labels are configured separately).
+// DefaultCEFRCourseNames are the standard course names seeded for each program (migration 000048).
+// Creating a course via the API may use any of these or a custom name.
+var DefaultCEFRCourseNames = []string{"A1", "A2", "B1", "B2", "C1", "C2"}
+
+// Course belongs to a Program.
 type Course struct {
 	ID          int64      `json:"id"`
 	ProgramID   int64      `json:"program_id"`