---
title: "Update a study"
method: PATCH
path: "/studies/{study_id}"
tags: ["studies"]
---

# Update a study

`PATCH /studies/{study_id}`

## Path parameters

- `study_id` integer, required

## Request body

- StudyPatchForm — This structure is used by the patch endpoint to patch a study
  - `actual_end_date` string, date, nullable
  - `budget` integer, nullable
  - `business_code` string, nullable
  - `description` string, nullable
  - `expected_end_date` string, date, nullable
  - `name` string, nullable
  - `service_code` string, nullable
  - `start_date` string, date, nullable
  - `state` string, nullable
  - `study_type` string, nullable
  - `tags` string[]

## Response `200`

The updated study

- StudyWithScenarios
  - `actual_end_date` string, date, nullable
  - `budget` integer, nullable
  - `business_code` string, nullable
  - `creation_date` string, date-time, required
  - `description` string, nullable
  - `expected_end_date` string, date, nullable
  - `id` integer, required
  - `last_modification` string, date-time, required
  - `name` string, required
  - `project_id` integer, required
  - `service_code` string, nullable
  - `start_date` string, date, nullable
  - `state` string, required
  - `study_type` string, nullable
  - `tags` string[], required
  - `scenarios_count` integer, required

---

[API](https://skmtc.net/openrailassociation/apis/osrd-editoast.md) · [All operations](https://skmtc.net/openrailassociation/apis/osrd-editoast/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/openrailassociation/osrd-editoast/versions/1840dbbd64ac/schema)