> ## 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 - Update Model Answer > This API allows authenticated users to update an existing model answer by either attaching rubric-based evaluation criteria or uploading supporting documents. ### Key Parameters: - **assignmentId** (`path param`, required): Unique ID of the assignment. - **rubricId** (`form-data`, optional): The unique ID of the rubric used for evaluation or you can refer [this doc](https://docs.crazygoldfish.com/api-reference/endpoint/rubrics/v1-rubric) to get the `rubricId`. - **isFinal** (`form-data`, optional): Pass `true` if this is the final model answer being submitted for evaluation. - **documents[]** (`form-data`, optional): Uploads related documents such as reference material or answer sheets. ### Behavior: - You must **only pass one** of these at a time: `documents`, `rubricId`, or `isFinal`. - If `isFinal=true`, the model answer sheet will be sent for evaluation. You can either upload `documents` or provide a `rubricId` in a single request — not both. This is to ensure clarity in what part of the model answer you're updating. ## OpenAPI ````yaml PATCH /assignment-evaluation/v1/assignment/{id}/model-answer/{modelAnswerId}/ 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}/model-answer/{modelAnswerId}/: patch: summary: Update Assignment Model Answer parameters: - name: id in: path required: true schema: type: string description: Unique identifier of the assignment - name: modelAnswerId in: path required: true schema: type: string description: Unique identifier of the model answer requestBody: required: false content: multipart/form-data: schema: type: object properties: rubricId: type: string example: 2b973c83-2830-4712-87b7-64a8c0a99035 description: >- Unique ID of the rubric to associate with the model answer sheet or you can refer [this doc](https://docs.crazygoldfish.com/api-reference/endpoint/rubrics/v1-rubric) to get the `rubricId` isFinal: type: string enum: - 'true' - 'false' example: 'true' description: >- Flag to trigger evaluation if set to 'true'. Only one of documents, rubricId, or isFinal is allowed. documents: type: array items: type: string format: binary description: List of model answer sheet documents to upload (if any). responses: '200': description: Model answer sheet updated successfully. content: application/json: schema: type: object properties: id: type: string format: uuid example: 3b27e0be-f9e8-4c4d-977b-b315bfb292ab description: Unique identifier for the model answer sheet. documents: type: array items: type: object example: [] description: List of documents associated with the model answer sheet. rubric: type: object properties: id: type: string example: 2b973c83-2830-4712-87b7-64a8c0a99035 description: Unique identifier for the rubric. name: type: string example: English Rubrics description: Name of the rubric. description: type: string nullable: true example: null description: Description of the rubric. rubricCriteria: type: array description: List of criteria for the rubric. items: type: object properties: id: type: string example: d102b0ff-1111-4235-b8e9-764ef03c57cb description: Unique identifier for the rubric criteria name: type: string example: Confidence & fluency in speaking description: Name of the rubric criteria description: type: string nullable: true description: Description of the rubric criteria example: '' maxScore: type: string example: 5 Star description: Maximum score for the rubric criteria minScore: type: string example: 1 Star description: Minimum score for the rubric criteria scoringLogic: type: array items: type: object properties: score: type: string example: 5 Star description: Score for the rubric criteria scoringLogic: type: string example: >- Speaking: Reflects poise & confidence. Great body language, eye contact. description: Scoring logic for the rubric criteria createdAt: type: string format: date-time example: '2023-10-01T12:00:00Z' description: Timestamp when the rubric criteria was created modifiedAt: type: string format: date-time example: '2023-10-01T12:00:00Z' description: >- Timestamp when the rubric criteria was last modified createdAt: type: string format: date-time example: '2023-10-01T12:00:00Z' description: Timestamp when the rubric was created modifiedAt: type: string format: date-time example: '2023-10-01T12:00:00Z' description: Timestamp when the rubric was last modified status: type: integer example: 1 description: >- Status of the model answer sheet [(refer this doc to get the constants)](https://docs.crazygoldfish.com/api-reference/endpoint/assignments/v1-constants) '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: >- Only one of documents, rubricId, or isFinal can be provided security: - bearerAuth: [] components: schemas: 403Response: type: object properties: detail: type: string example: Token has expired securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT ````