我的问题是从URI字符串反序列化实体。
当我使用Spring Data Rest生成的HTTP接口(interface)时，一切正常。
我可以针对端点/api/shoppingLists发布以下JSON，并将其反序列化为以admin作为所有者的购物 list 。
{
"name":"Test",
"owners":["http://localhost:8080/api/sLUsers/admin"]
}
当我使用自定义的RepositoryRestController时，它将不再起作用。如果我将完全相同的JSON发布到相同的端点，则会收到此响应。
{
"timestamp" : "2015-11-15T13:18:34.550+0000",
"status" : 400,
"error" : "Bad Request",
"exception" : "org.springframework.http.converter.HttpMessageNotReadableException",
"message" : "Could not read document: Can not instantiate value of type [simple type, class de.yannicklem.shoppinglist.core.user.entity.SLUser] from String value ('http://localhost:8080/api/sLUsers/admin'); no single-String constructor/factory method\n at [Source: java.io.PushbackInputStream@9cad4d2; line: 1, column: 26] (through reference chain: de.yannicklem.shoppinglist.core.list.entity.ShoppingList[\"owners\"]->java.util.HashSet[0]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not instantiate value of type [simple type, class de.yannicklem.shoppinglist.core.user.entity.SLUser] from String value ('http://localhost:8080/api/sLUsers/admin'); no single-String constructor/factory method\n at [Source: java.io.PushbackInputStream@9cad4d2; line: 1, column: 26] (through reference chain: de.yannicklem.shoppinglist.core.list.entity.ShoppingList[\"owners\"]->java.util.HashSet[0])",
"path" : "/api/shoppingLists"
}
我的RepositoryRestController:
@RepositoryRestController
@ExposesResourceFor(ShoppingList.class)
@RequiredArgsConstructor(onConstructor = @__(@Autowired ))
public class ShoppingListRepositoryRestController {
private final ShoppingListService shoppingListService;
private final CurrentUserService currentUserService;
@RequestMapping(method = RequestMethod.POST, value = ShoppingListEndpoints.SHOPPING_LISTS_ENDPOINT)
@ResponseBody
@ResponseStatus(HttpStatus.CREATED)
public PersistentEntityResource postShoppingList(@RequestBody ShoppingList shoppingList,
PersistentEntityResourceAssembler resourceAssembler) {
if (shoppingListService.exists(shoppingList)) {
shoppingListService.handleBeforeSave(shoppingList);
} else {
shoppingListService.handleBeforeCreate(shoppingList);
}
return resourceAssembler.toResource(shoppingListService.save(shoppingList));
}
}
有人可以告诉我为什么自定义RepositoryRestController(由docs建议)不再反序列化吗？
有关完整的源代码，请查看GitHub repo
最佳答案
为了使用HAL MessageConverter，您应该有一个Resource作为参数。尝试将您的代码更改为:
public PersistentEntityResource postShoppingList(@RequestBody Resource<ShoppingList> shoppingList)