feat: students count for course

app/Controllers/Http/Api/v1/CoursesController.ts

@@ -181,6 +181,16 @@ export default class CoursesController extends BaseController {
 
     return this.sendResponse(ctx, result.data, result.message, result.status);
   }
+
+  public async studentsCount(ctx: HttpContextContract) {
+    const result = await this.courseService.fetchStudentsCount(ctx.params.id);
+
+    if (!result.success && result.error) {
+      throw new Exception(result.message, result.status, result.error.code);
+    }
+
+    return this.sendResponse(ctx, result.data, result.message, result.status);
+  }
 }
 
 new Ioc().make(CoursesController);

app/Repositories/CourseRepository.ts

@@ -86,7 +86,7 @@ export default class CourseRepository {
   }
 
   /**
-   * Get students of cours
+   * Get students of course
    *
    * @param id Course id
    * @returns List of users or null
@@ -96,6 +96,18 @@ export default class CourseRepository {
     return course && course.students;
   }
 
+  /**
+   * Get count of students
+   *
+   * @param id Course if
+   * @returns Students count
+   */
+  public async getStudentsCount(id: string | number): Promise<{ count: any } | null> {
+    const course = await this.Course.query().where('id', id).withCount('students').first();
+
+    return course && ({ count: course.$extras.students_count } ?? null);
+  }
+
   /**
    * Create course
    *

app/Services/CourseService.ts

@@ -196,6 +196,35 @@ export default class CourseService {
     };
   }
 
+  /**
+   * Fetch students count by course id
+   *
+   * @param id Course id
+   * @returns Response
+   */
+  public async fetchStudentsCount(id: string | number): Promise<IResponse> {
+    const data = await this.courseRepository.getStudentsCount(id);
+
+    if (!data) {
+      return {
+        success: false,
+        status: StatusCodeEnum.NOT_FOUND,
+        message: 'Course not found.',
+        data: {},
+        error: {
+          code: 'E_NOT_FOUND',
+        },
+      };
+    }
+
+    return {
+      success: true,
+      status: StatusCodeEnum.OK,
+      message: 'Fetched students count.',
+      data,
+    };
+  }
+
   /**
    * Create course
    *

routes/apis/v1/courses.ts

@@ -22,6 +22,10 @@ Route.group(() => {
     .middleware('role:admin,teacher,student')
     .as('courses.show-students');
 
+  Route.get('/:id/students/count', 'Api/v1/CoursesController.studentsCount')
+    .middleware('role:admin,teacher,student')
+    .as('courses.students-count');
+
   Route.post('/:id/attach-student', 'Api/v1/CoursesController.attachStudent')
     .middleware('role:admin,teacher')
     .as('courses.attach-student');

routes/apis/v1/index.ts

@@ -2,7 +2,7 @@
 import Route from '@ioc:Adonis/Core/Route';
 
 Route.group(() => {
-  Route.get('/', () => `Educt Backend API.`).as('index');
+  Route.get('/', () => `Backend API.`).as('index');
 
   /**
    *