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DELETE
/
api
/
v1
/
users
/
{userId}
/
books
/
{bookId}
Remove Book from User
curl --request DELETE \
  --url https://api.example.com/api/v1/users/{userId}/books/{bookId}
{
  "id": "550e8400-e29b-41d4-a716-446655440000",
  "userName": "jsmith",
  "name": "John Smith",
  "birthDate": "1990-05-15",
  "bookIds": [
    "9f3e4a56-2c1d-4b8e-8f6d-5a3c2b1d4e5f"
  ]
}
This endpoint removes the association between a user and a book, removing the book from the user’s personal collection.

​
Authentication

This endpoint requires JWT authentication. Include a valid JWT token in the Authorization header. 
Authorization: Bearer <your_jwt_token>

​
Path Parameters

​
userId
string
required
The unique identifier (UUID) of the user
​
bookId
string
required
The unique identifier (UUID) of the book to remove from the user’s collection

​
Response

​
id
string
Unique identifier of the user (UUID format)
​
userName
string
Username for the user’s account
​
name
string
Full name of the user
​
birthDate
string
Date of birth in ISO 8601 format (YYYY-MM-DD)
​
bookIds
array
Updated array of book UUIDs associated with this user (excludes the removed book)

​
Example Request

cURL
curl -X DELETE "https://api.library.com/api/v1/users/550e8400-e29b-41d4-a716-446655440000/books/7c9e6679-7425-40de-944b-e07fc1f90ae7" \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."

​
Example Response

{
  "id": "550e8400-e29b-41d4-a716-446655440000",
  "userName": "jsmith",
  "name": "John Smith",
  "birthDate": "1990-05-15",
  "bookIds": [
    "9f3e4a56-2c1d-4b8e-8f6d-5a3c2b1d4e5f"
  ]
}

​
Status Codes

CodeDescription
200Successfully removed book from user’s collection
400Bad request - Invalid UUID format
401Unauthorized - Invalid or missing JWT token
404User or book not found
500Internal server error

​
Notes

  • This endpoint removes the many-to-many relationship between the user and the book
  • Removing a book from a user’s collection does not delete the book from the system
  • If the book is not in the user’s collection, the operation is idempotent (no error thrown)
  • The response includes the complete updated user object with remaining associated book IDs
  • Both the user and the book must exist in the system

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