count data for course

db/query/lms_courses.sql

@@ -39,7 +39,29 @@ SELECT
     c.thumbnail,
     c.sort_order,
     c.created_at,
-    c.updated_at
+    c.updated_at,
+    (
+        SELECT
+            COUNT(*)::bigint
+        FROM
+            modules m
+        WHERE
+            m.course_id = c.id) AS module_count,
+    (
+        SELECT
+            COUNT(*)::bigint
+        FROM
+            lessons l
+            INNER JOIN modules m ON l.module_id = m.id
+        WHERE
+            m.course_id = c.id) AS lesson_count,
+    (
+        SELECT
+            COUNT(*)::bigint
+        FROM
+            lms_practices p
+        WHERE
+            p.course_id = c.id) AS practice_count
 FROM
     courses c
 WHERE

gen/db/lms_courses.sql.go

@@ -129,7 +129,29 @@ SELECT
     c.thumbnail,
     c.sort_order,
     c.created_at,
-    c.updated_at
+    c.updated_at,
+    (
+        SELECT
+            COUNT(*)::bigint
+        FROM
+            modules m
+        WHERE
+            m.course_id = c.id) AS module_count,
+    (
+        SELECT
+            COUNT(*)::bigint
+        FROM
+            lessons l
+            INNER JOIN modules m ON l.module_id = m.id
+        WHERE
+            m.course_id = c.id) AS lesson_count,
+    (
+        SELECT
+            COUNT(*)::bigint
+        FROM
+            lms_practices p
+        WHERE
+            p.course_id = c.id) AS practice_count
 FROM
     courses c
 WHERE
@@ -147,15 +169,18 @@ type ListCoursesByProgramIDParams struct {
 }
 
 type ListCoursesByProgramIDRow struct {
-	TotalCount  int64              `json:"total_count"`
+	TotalCount    int64              `json:"total_count"`
-	ID          int64              `json:"id"`
+	ID            int64              `json:"id"`
-	ProgramID   int64              `json:"program_id"`
+	ProgramID     int64              `json:"program_id"`
-	Name        string             `json:"name"`
+	Name          string             `json:"name"`
-	Description pgtype.Text        `json:"description"`
+	Description   pgtype.Text        `json:"description"`
-	Thumbnail   pgtype.Text        `json:"thumbnail"`
+	Thumbnail     pgtype.Text        `json:"thumbnail"`
-	SortOrder   int32              `json:"sort_order"`
+	SortOrder     int32              `json:"sort_order"`
-	CreatedAt   pgtype.Timestamptz `json:"created_at"`
+	CreatedAt     pgtype.Timestamptz `json:"created_at"`
-	UpdatedAt   pgtype.Timestamptz `json:"updated_at"`
+	UpdatedAt     pgtype.Timestamptz `json:"updated_at"`
+	ModuleCount   int64              `json:"module_count"`
+	LessonCount   int64              `json:"lesson_count"`
+	PracticeCount int64              `json:"practice_count"`
 }
 
 func (q *Queries) ListCoursesByProgramID(ctx context.Context, arg ListCoursesByProgramIDParams) ([]ListCoursesByProgramIDRow, error) {
@@ -177,6 +202,9 @@ func (q *Queries) ListCoursesByProgramID(ctx context.Context, arg ListCoursesByP
 			&i.SortOrder,
 			&i.CreatedAt,
 			&i.UpdatedAt,
+			&i.ModuleCount,
+			&i.LessonCount,
+			&i.PracticeCount,
 		); err != nil {
 			return nil, err
 		}

internal/domain/course.go

@@ -23,7 +23,11 @@ type Course struct {
 	SortOrder   int        `json:"sort_order"`
 	CreatedAt   time.Time  `json:"created_at"`
 	UpdatedAt   *time.Time `json:"updated_at,omitempty"`
-	Access      *LMSEntityAccess `json:"access,omitempty"`
+	// Populated on list-by-program; practices with course_id set (direct course practice only).
+	ModuleCount   int `json:"module_count"`
+	LessonCount   int `json:"lesson_count"`
+	PracticeCount int `json:"practice_count"`
+	Access        *LMSEntityAccess `json:"access,omitempty"`
 }
 
 type CreateCourseInput struct {

internal/repository/lms_courses.go

@@ -74,7 +74,7 @@ func (s *Store) ListCoursesByProgramID(ctx context.Context, programID int64, lim
 		if i == 0 {
 			total = r.TotalCount
 		}
-		out = append(out, courseToDomain(dbgen.Course{
+		co := courseToDomain(dbgen.Course{
 			ID:          r.ID,
 			ProgramID:   r.ProgramID,
 			Name:        r.Name,
@@ -83,7 +83,11 @@ func (s *Store) ListCoursesByProgramID(ctx context.Context, programID int64, lim
 			CreatedAt:   r.CreatedAt,
 			UpdatedAt:   r.UpdatedAt,
 			SortOrder:   r.SortOrder,
-		}))
+		})
+		co.ModuleCount = int(r.ModuleCount)
+		co.LessonCount = int(r.LessonCount)
+		co.PracticeCount = int(r.PracticeCount)
+		out = append(out, co)
 	}
 	return out, total, nil
 }