feat: add is_enrolled field to learners endpoint response

[dwong2708]

Description

This PR adds a new is_enrolled field to the learners endpoint and integrates it into the Instructor Dashboard UI.

The goal is to expose enrollment status directly in the learners data, enabling the frontend to display or act on whether a learner is currently enrolled in a course without requiring additional API calls.

Related Issue

openedx/frontend-app-instructor-dashboard#164

Changes:

Add is_enrolled field to learners endpoint response
Update frontend data handling to include the new field
Ensure compatibility with existing learners view/components

Notes

This change is backward compatible (adds a new field without modifying existing ones)
No impact expected on existing functionality

Deadline

Verawood

[openedx-webhooks]

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[Copilot]

Pull request overview

This PR extends the Instructor API v2 learner detail endpoint to include a learner’s current enrollment status (is_enrolled) and adds/updates tests to validate the new response field.

Changes:

• Add is_enrolled to LearnerSerializer output schema.
• Populate is_enrolled in LearnerView via CourseEnrollment.is_enrolled(...).
• Extend learner detail endpoint tests to cover enrolled vs non-enrolled scenarios.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
lms/djangoapps/instructor/views/serializers_v2.py	Adds is_enrolled boolean field to the learner response serializer.
lms/djangoapps/instructor/views/api_v2.py	Includes is_enrolled in the learner detail response and updates the documented example JSON.
lms/djangoapps/instructor/tests/views/test_api_v2.py	Adds assertions and a new test case to verify is_enrolled behavior.

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[Copilot]

The test imports CourseEnrollment from xmodule.modulestore.tests.django_utils, which is a modulestore test helper module. To keep dependencies clear and consistent with other instructor tests in this repo, import CourseEnrollment directly from the student models module instead (e.g., the same import path used in lms/djangoapps/instructor/tests/test_api_v2.py).

[Copilot]

This file’s tests primarily use unittest.TestCase assertions (e.g., self.assertEqual, self.assertFalse), but this new test uses bare assert statements. Please switch these to the existing assertion style for consistency and clearer failure messages.

Suggested change

	assert response.status_code == status.HTTP_200_OK
	data = response.json()
	assert data['is_enrolled']
	self.assertEqual(response.status_code, status.HTTP_200_OK) # noqa: PT009
	data = response.json()
	self.assertTrue(data['is_enrolled']) # noqa: PT009