PATCH and DELETE

PATCH and DELETE Requests

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This section covers using PATCH requests to update resources and DELETE requests to remove them, focusing on the Postman Library API.

Updating a Book (Checking Out)

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The PATCH method allows partial updates to a resource. This example demonstrates updating a book’s checkedOut status.

1. In the Postman Library API v2 collection, add a new request named “checkout a book.”
2. Set the request method to PATCH.
3. Set the request URL to {{baseUrl}}/books/:id.
4. In the “Params” tab, set the id path variable to {{id}} (using the collection variable set previously).

   

5. In the “Body” tab, select “raw” and “JSON,” then add the following JSON:

{
  "checkedOut": true
}

6. Save and send the request.

The response should be a 200 OK with the updated book data showing checkedOut: true. The inherited collection-level authorization applies to this request.

The updated data can also be verified using the “get book by id” request.

Deleting a Book

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The DELETE method removes a resource. This example demonstrates deleting a book.

1. In the Postman Library API v2 collection, add a new request named “delete a book.”
2. Set the request method to DELETE.
3. Set the request URL to {{baseUrl}}/books/:id.
4. In the “Params” tab, ensure the id path variable is set to {{id}}.
5. Save and send the request.

The response should be a 204 No Content, indicating successful deletion.

Verifying Deletion

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Sending the same request again results in a 404 Not Found error because the book with the specified ID no longer exists.