public IHttpActionResult PostProduct(ProductViewModel product_view_model)
{
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
Category category = db.Categories.Find(product_view_model.Category_Id);
if (category==null)
{
return BadRequest("找不到對應的產品分類: " + product_view_model.Category_Id);
}
Product product = new Product { Name = product_view_model.Name, Price = product_view_model.Price, Category = category };
db.Products.Add(product);
db.SaveChanges();
return CreatedAtRoute("DefaultApi", new { id = product.Id }, ToViewModel(product));
}
public IHttpActionResult PutProduct(int id, ProductViewModel product_view_model)
{
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
if (id != product_view_model.Id)
{
return BadRequest();
}
Category category = db.Categories.Find(product_view_model.Category_Id);
if (category == null)
{
return BadRequest("找不到對應的產品分類: " + product_view_model.Category_Id);
}
//把資料庫中的那筆資料讀出來
Product product_db = db.Products.Find(id);
if (product_db == null)
{
return ResponseMessage(Request.CreateErrorResponse(HttpStatusCode.NotFound, "這筆資料已被刪除!"));
}
else
{
try
{
product_db.Name = product_view_model.Name;
product_db.Price = product_view_model.Price;
product_db.Category = category;
db.Entry(product_db).OriginalValues["Timestamp"] = Convert.FromBase64String(product_view_model.TimestampString);
db.SaveChanges();
}
catch (DbUpdateConcurrencyException)
{
if (!ProductExists(id))
throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.NotFound, "這筆資料已被刪除!"));
else
throw new HttpResponseException(Request.CreateErrorResponse(HttpStatusCode.Conflict, "這筆資料已被其他人修改!"));
}
}
return Ok(ToViewModel(product_db));
}
