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fix: WorkItemAttachments.create() raises ValidationError on actual Plane response

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
68/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Quiet
Tech stack
python
Domain
api

Research direction

Start at WorkItemAttachments.create() and the WorkItemAttachment model, then compare their validation path with the documented Plane wrapper response. Reproduce the call using WorkItemAttachmentUploadRequest and verify that the result exposes both the nested attachment record and upload_data without a ValidationError.

Written by the indexing model from the issue text.

Description

Calling client.work_items.attachments.create(...) against a live Plane instance raises:

pydantic.ValidationError: 1 validation error for WorkItemAttachment
asset
  Field required [type=missing, input_value={'upload_data': {...}, 'asset_id': '...', 'attachment': {...}, 'asset_url': '...'}, input_type=dict]

Plane returns a wrapper response, not a flat WorkItemAttachment:

{
  "upload_data": { "url": "...", "fields": { "...S3 multipart policy..." } },
  "asset_id": "427e...",
  "attachment": { "id": "427e...", "asset": "ws/uuid-name.ext", "is_uploaded": false, ... },
  "asset_url": "/api/assets/v2/.../attachments/427e.../"
}

But WorkItemAttachments.create() calls WorkItemAttachment.model_validate(response) directly on the wrapper — WorkItemAttachment is actually nested inside response["attachment"]. Hence the missing-asset validation error.

Reproduction:

from plane import PlaneClient
from plane.models.work_items import WorkItemAttachmentUploadRequest

client = PlaneClient(api_key="<key>", base_url="https://your-plane.example.io")
client.work_items.attachments.create(
    workspace_slug="ws", project_id="<uuid>", work_item_id="<uuid>",
    data=WorkItemAttachmentUploadRequest(name="x.txt", size=10),
)
# raises pydantic.ValidationError

Suggested fix: add a new WorkItemAttachmentCreateResponse model capturing the full wrapper and change WorkItemAttachments.create() to return it. Exposes both the attachment record and the upload data the caller needs for the S3 multipart
POST.

PR coming.

Dominant language
Python
Stars
17
Forks
24
Avg merge
8d 9h
Merged PRs (30d)
2

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