> ## Documentation Index > Fetch the complete documentation index at: https://docs.crazygoldfish.com/llms.txt > Use this file to discover all available pages before exploring further. # PATCH - Student Assignment Sheet > The API allows clients to upload and associate documents with an existing student assignment sheet for a specific assignment. Only one type of file format (either PDF or multiple images like JPEG) is allowed for a single assignment sheet. Mixing formats in a single assignment sheet is not permitted. **Scenarios:** 1. **Uploading PDF Document to a Student’s assignment Sheet:** - The teacher provides the assignment Sheet ID and uploads a PDF. - **Outcome:** - The student’s scanned assignment sheet is successfully uploaded in PDF format, replacing the placeholder document. 2. **Uploading Multiple JPEG Images for a Student’s assignment Sheet:** - A student’s handwritten assignment sheet is scanned in parts and saved as multiple JPEG images. - The teacher uploads each image sequentially using the same assignment Sheet ID. - **Outcome:** - All images are uploaded, completing the student's assignment sheet and associating them for grading. **Note:** - After setting `isFinal` to `true`, the AI extraction process begins. This process may take some time to complete. - To streamline workflows, the system supports a webhook feature. Upon successful extraction, a notification is sent to the configured webhook URL. - Only one of `documents` or `isFinal` can be processed at a time. If both `documents` and `isFinal` are provided in the same request, a validation error is returned. Use either `documents` to upload, or `isFinal` to trigger extraction — **not both together**. ## OpenAPI ````yaml PATCH /assignment-evaluation/v1/assignment/{id}/answer-sheet/{assignmentSheetId}/ openapi: 3.0.1 info: title: Evaluation Report API description: An API for retrieving evaluation reports. version: 1.0.0 servers: - url: https://api-staging.crazygoldfish.com description: SandBox endpoint - url: https://api.crazygoldfish.com description: Prod End Point security: [] paths: /assignment-evaluation/v1/assignment/{id}/answer-sheet/{assignmentSheetId}/: patch: tags: - Assignments summary: Update Assignment Answer Sheet operationId: updateAssignmentAnswerSheet parameters: - name: id in: path required: true schema: type: string description: Unique identifier of the assignment - name: assignmentSheetId in: path required: true schema: type: string description: Unique identifier of the answer sheet requestBody: required: false content: multipart/form-data: schema: type: object properties: documents: type: array items: type: string format: binary description: List of answer sheet documents to upload (if any). isFinal: type: boolean example: true description: >- Flag to trigger evaluation if set to 'true'. Only one of documents, or isFinal is allowed. responses: '200': description: Answer sheet uploaded successfully. content: application/json: schema: type: object properties: id: type: string format: uuid example: 57387c68-0706-4a9d-834a-237b6b63cb5d description: Unique identifier for the answer sheet. status: type: integer example: 0 description: >- Status of the answer sheet [(refer this doc to get the constants)](https://docs.crazygoldfish.com/api-reference/endpoint/assignments/v1-constants) studentId: type: string example: '12345' description: Unique identifier of the student. name: type: string example: John Doe description: Name of the student. batchId: type: string example: batch_1 nullable: true description: Unique identifier of the batch. sessionId: type: string example: session_1 nullable: true description: Unique identifier of the session. documents: type: array description: List of documents associated with the assignment. items: $ref: '#/components/schemas/AssignmentDocument' '400': description: Bad request (validation error or business logic conflict). content: application/json: schema: type: object properties: error: type: object properties: code: type: integer example: 400 message: type: object properties: non_field_errors: type: array items: type: string example: >- Only one of documents, or isFinal can be provided '403': description: Authentication failed. content: application/json: schema: $ref: '#/components/schemas/403Response' '404': description: Assignment not found. content: application/json: schema: type: object properties: error: type: object properties: code: type: integer example: 404 message: type: object properties: non_field_errors: type: array items: type: string example: Assignment is not found security: - bearerAuth: [] components: schemas: AssignmentDocument: type: object properties: id: type: string format: uuid example: bec0d0bf-fff6-40de-9750-65f5dcaf470d description: Unique identifier for the document. status: type: integer example: 1 description: Status of the document. pageNo: nullable: true type: integer example: 1 uploadTime: type: string format: date-time example: '2025-04-06T09:04:11.716434Z' description: Upload time of the document. url: type: string format: uri example: >- https://cgfblob.blob.core.windows.net/documents/assignment-evaluation/olfactory_imagery_HW_PDF_2_questions_1_H7dPCAd.pdf description: URL of the document. fileType: type: integer example: 1 description: Type of the file. 403Response: type: object properties: detail: type: string example: Token has expired securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT ````