Spring 数据 JDBC: 找不到 属性 类型
Spring Data JDBC: No such property found for type
我是 Spring 数据 JDBC 的初学者。我正在关注第 6 版中的 Spring 并创建了如下存储库:
package com.springinaction.tacocloud;
import java.util.Optional;
import org.springframework.data.repository.CrudRepository;
public interface IngredientRepository extends CrudRepository<Ingredient, String>{
public Optional<Ingredient> getById(String id);
public Iterable<Ingredient> getIngredients();
public Ingredient save(Ingredient ingredient);
}
并且我已将此存储库注入到我的控制器中。
@Slf4j
@Controller
@RequestMapping("/design")
public class DesignTacoController {
protected IngredientRepository ingredientRepo;
public DesignTacoController(IngredientRepository ingredientRepo) {
this.ingredientRepo = ingredientRepo;
}
@ModelAttribute
public void addIngredientsToModel(Model model) {
Iterable<Ingredient> ingredientsFromJdbc = ingredientRepo.getIngredients();
//converting Iterable returned by JdbcTemplate to a List
List<Ingredient> ingredients = new ArrayList<Ingredient>();
ingredientsFromJdbc.forEach(ingredients::add);
Type[] types = Ingredient.Type.values();
for (Type type : types) {
model.addAttribute(type.toString().toLowerCase(),filterByType(ingredients, type));
}
}
.......................................................................
在控制器中调用方法 getIngredients() 会抛出以下异常
nested exception is org.springframework.data.mapping.PropertyReferenceException: No property 'getIngredients' found for type 'Ingredient'!
我在这里错过了什么?
把方法getIngredients()
去掉,改用findAll()
(超级接口提供)
你也应该去掉其他的方法,因为它们已经被超级接口提供了
save()
<- 由 CrudRepository
提供
getById()
<- CrudRepository
提供 Optional<T> findById(ID id);
getIngredients
<- CrudRepository
提供 Iterable<T> findAll();
我是 Spring 数据 JDBC 的初学者。我正在关注第 6 版中的 Spring 并创建了如下存储库:
package com.springinaction.tacocloud;
import java.util.Optional;
import org.springframework.data.repository.CrudRepository;
public interface IngredientRepository extends CrudRepository<Ingredient, String>{
public Optional<Ingredient> getById(String id);
public Iterable<Ingredient> getIngredients();
public Ingredient save(Ingredient ingredient);
}
并且我已将此存储库注入到我的控制器中。
@Slf4j
@Controller
@RequestMapping("/design")
public class DesignTacoController {
protected IngredientRepository ingredientRepo;
public DesignTacoController(IngredientRepository ingredientRepo) {
this.ingredientRepo = ingredientRepo;
}
@ModelAttribute
public void addIngredientsToModel(Model model) {
Iterable<Ingredient> ingredientsFromJdbc = ingredientRepo.getIngredients();
//converting Iterable returned by JdbcTemplate to a List
List<Ingredient> ingredients = new ArrayList<Ingredient>();
ingredientsFromJdbc.forEach(ingredients::add);
Type[] types = Ingredient.Type.values();
for (Type type : types) {
model.addAttribute(type.toString().toLowerCase(),filterByType(ingredients, type));
}
}
.......................................................................
在控制器中调用方法 getIngredients() 会抛出以下异常
nested exception is org.springframework.data.mapping.PropertyReferenceException: No property 'getIngredients' found for type 'Ingredient'!
我在这里错过了什么?
把方法getIngredients()
去掉,改用findAll()
(超级接口提供)
你也应该去掉其他的方法,因为它们已经被超级接口提供了
save()
<- 由CrudRepository
提供
getById()
<-CrudRepository
提供Optional<T> findById(ID id);
getIngredients
<-CrudRepository
提供Iterable<T> findAll();