public IHttpActionResult PutBookAuthorCoupling(int id, BookAuthorCoupling bookAuthorCoupling)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            if (id != bookAuthorCoupling.Id)
            {
                return(BadRequest());
            }

            db.Entry(bookAuthorCoupling).State = EntityState.Modified;

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!BookAuthorCouplingExists(id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(StatusCode(HttpStatusCode.NoContent));
        }
        public IHttpActionResult GetBookAuthorCoupling(int id)
        {
            BookAuthorCoupling bookAuthorCoupling = db.BookAuthorCouplings.Find(id);

            if (bookAuthorCoupling == null)
            {
                return(NotFound());
            }

            return(Ok(bookAuthorCoupling));
        }
        public IHttpActionResult PostBookAuthorCoupling(BookAuthorCoupling bookAuthorCoupling)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            db.BookAuthorCouplings.Add(bookAuthorCoupling);
            db.SaveChanges();

            return(CreatedAtRoute("DefaultApi", new { id = bookAuthorCoupling.Id }, bookAuthorCoupling));
        }
        public IHttpActionResult DeleteBookAuthorCoupling(int id)
        {
            BookAuthorCoupling bookAuthorCoupling = db.BookAuthorCouplings.Find(id);

            if (bookAuthorCoupling == null)
            {
                return(NotFound());
            }

            db.BookAuthorCouplings.Remove(bookAuthorCoupling);
            db.SaveChanges();

            return(Ok(bookAuthorCoupling));
        }