fix(api): fix QuerySet attribute access and task execution in project invitations

[prakharsingh-74]

Summary

Problem

1. AttributeError on QuerySet property access:
   Line 65 in apps/api/plane/app/views/project/invite.py attempted to access .role directly on WorkspaceMember.objects.filter(...). Since .filter() returns a QuerySet object rather than a single model instance, any call to invite project members raised AttributeError: 'QuerySet' object has no attribute 'role'.

2. Celery Task Variable Shadowing & Invalid Method Call:
   The list of newly created ProjectMemberInvite instances was assigned to a local variable named project_invitations. This shadowed the background Celery task function project_invitation, and calling project_invitations.delay(...) raised AttributeError: 'list' object has no attribute 'delay'.

3. Missing Error Status Code:
   When a user was invited with a role conflicting with their workspace role, the API returned an error payload without specifying status=status.HTTP_400_BAD_REQUEST, causing invalid requests to return 200 OK.

Approach

1. QuerySet handling:
   Used .first() on WorkspaceMember.objects.filter(...) to safely retrieve the WorkspaceMember instance, and added a check (if workspace_member:) before accessing .role.

2. Task Invocation:
   Explicitly imported project_invitation from plane.bgtasks.project_invitation_task, and renamed the intermediate list to invitation_objects so project_invitation.delay(...) correctly calls the Celery task.

3. Error Status:
   Added status=status.HTTP_400_BAD_REQUEST when returning role validation error responses.

4. Test Coverage:
   Added contract tests in apps/api/plane/tests/contract/app/test_project_invitations.py to verify invite creation, database record insertion, empty payload validation, and Celery task execution.

Summary by CodeRabbit

• Bug Fixes
  • Fixed project invitation emails so they are sent after invitations are created.
  • Improved handling of requests with missing or invalid email entries, and requests with no email addresses.
  • Project invitations now consistently match email addresses regardless of surrounding spaces or letter case, helping ensure workspace role restrictions are enforced.
  • Prevented errors when checking workspace membership for invited users who have no matching membership.

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📥 Commits

Reviewing files that changed from the base of the PR and between abef0e0 and 1b98264.

📒 Files selected for processing (2)

• apps/api/plane/app/views/project/invite.py
• apps/api/plane/tests/contract/app/test_project_invitations.py

🚧 Files skipped from review as they are similar to previous changes (2)

• apps/api/plane/app/views/project/invite.py
• apps/api/plane/tests/contract/app/test_project_invitations.py

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📝 Walkthrough

Walkthrough

The project invitation endpoint now skips missing or invalid email values and normalizes valid email addresses for workspace-role lookup and invite storage. It returns HTTP 400 for role mismatches and dispatches invitations through the imported Celery task. Contract tests cover successful invitations, empty email lists, and mixed-case role validation.

Changes

Project invitations

Layer / File(s)	Summary
Project invitation validation and dispatch apps/api/plane/app/views/project/invite.py, apps/api/plane/tests/contract/app/test_project_invitations.py	The endpoint skips missing or invalid email values and uses normalized addresses for workspace-role lookup and invite records. It returns HTTP 400 for role mismatches and dispatches the project_invitation task. Contract tests cover successful creation, empty email lists, and role validation for a padded mixed-case address.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to 1b982

The invitation changes are mergeable after normal checks. No confirmed issue remains that would block creating or accepting invitations.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 75.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the two primary fixes: QuerySet attribute access and Celery task execution in project invitations.
Description check	✅ Passed	The description explains the reported problems, implementation approach, and test coverage. It does not use the required template headings or select a Type of Change, and it does not explicitly addres…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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Inline comments:
In `@apps/api/plane/app/views/project/invite.py`:
- Line 72: Update the WorkspaceMember lookup near workspace_member to use the
same stripped, lowercased email value used when creating the invitation, so
mixed-case submissions still match existing members before role validation. Add
a mixed-case email test that verifies the existing member is found and the
requested role is validated.

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ℹ️ Review info

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Configuration used: defaults

Review profile: CHILL

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Run ID: aaa299ee-eeb2-456f-8069-6caafec1d850

📥 Commits

Reviewing files that changed from the base of the PR and between f230d15 and abef0e0.

📒 Files selected for processing (2)

• apps/api/plane/app/views/project/invite.py
• apps/api/plane/tests/contract/app/test_project_invitations.py

Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.