參數綁定的名稱不能為 null 或為空！ 對於命名參數，您需要在 Java 版本上使用 @Param 作為查詢方法參數

Question

這之前已經發布過，但我的問題有點不同。 這是有問題的 JPQL 查詢：

@Query("SELECT NEW com.htd.domain.ShopOrder(po.id, po.po_number, "
            + "po.due_date, po_part.id, po_part.part_quantity, "
            + "part.id, part.part_number, part.part_description, "
            + "part.plasma_hrs_per_part, part.grind_hrs_per_part, "
            + "part.mill_hrs_per_part, part.brakepress_hrs_per_part) "
            + "FROM Po po "
            + "LEFT JOIN po.partList po_part "
            + "LEFT JOIN po_part.part part "
            + "LEFT JOIN po_part.part where po.id = :id")
    List<ShopOrder> getShopOrder(long id);

現在我確實嘗試這樣做：

@Query("SELECT NEW com.htd.domain.ShopOrder(po.id, po.po_number, "
            + "po.due_date, po_part.id, po_part.part_quantity, "
            + "part.id, part.part_number, part.part_description, "
            + "part.plasma_hrs_per_part, part.grind_hrs_per_part, "
            + "part.mill_hrs_per_part, part.brakepress_hrs_per_part) "
            + "FROM Po po "
            + "LEFT JOIN po.partList po_part "
            + "LEFT JOIN po_part.part part "
            + "LEFT JOIN po_part.part where po.id = :id")
    List<ShopOrder> getShopOrder(@Param(value="id"));

但這給了我一個警告：

    [ERROR] org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/].  
 [dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in 
 context with path [] threw exception [Request processing failed; nested   
 exception is org.springframework.dao.InvalidDataAccessApiUsageException: 
 Name for parameter binding must not be null or empty! For named parameters 
 you need to use @Param for query method parameters on Java versions < 8.; 
 nested exception is java.lang.IllegalArgumentException: Name for parameter 
 binding must not be null or empty! For named parameters you need to use 
 @Param for query method parameters on Java versions < 8.] with root cause
java.lang.IllegalArgumentException: Name for parameter binding must not be 
null or empty! For named parameters you need to use @Param for query method   
parameters on Java versions < 8.

執行查詢的方法是：

 /**
     * Generate Shop Orders.
     */
    @RequestMapping(value = "/generateShopOrder/{id}", method = RequestMethod.PUT, produces = MediaType.APPLICATION_JSON_VALUE)
    @Timed
    public void generate(@PathVariable Long id) throws URISyntaxException {
        System.out.println("po id to generate = " + id);

        List<ShopOrder> shopOrders = po_partRepository.getShopOrder(id);

        for(ShopOrder order: shopOrders) {
            System.out.println("-------Printing Shop Orders" + order);
        }

    }

建議？

- - - - - - 更新 - - - - - - - -

這似乎解決了這個問題：

@Query("SELECT NEW com.htd.domain.ShopOrder(po.id, po.po_number, "
            + "po.due_date, po_part.id, po_part.part_quantity, "
            + "part.id, part.part_number, part.part_description, "
            + "part.plasma_hrs_per_part, part.grind_hrs_per_part, "
            + "part.mill_hrs_per_part, part.brakepress_hrs_per_part) "
            + "FROM Po po "
            + "LEFT JOIN po.partList po_part "
            + "LEFT JOIN po_part.part part "
            + "LEFT JOIN po_part.part where po.id = ?1")
    List<ShopOrder> getShopOrder(Long id);

但是現在我收到一條錯誤消息：

[ERROR] org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/].
[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in 
context with path [] threw exception [Request processing failed; nested 
exception is org.springframework.dao.InvalidDataAccessApiUsageException: 
org.hibernate.QueryException: could not instantiate class 
[com.htd.domain.ShopOrder] from tuple; nested exception is 
java.lang.IllegalArgumentException: org.hibernate.QueryException: could not 
instantiate class [com.htd.domain.ShopOrder] from tuple] with root cause
java.lang.IllegalArgumentException: null

商店訂單：

public ShopOrder(long po_id, String po_number, LocalDate po_due_date,
    long po_part_id, int part_quantity, long part_id,
    String part_number, String part_decription, BigDecimal plasma_hrs,
    BigDecimal grind_hours, BigDecimal mill_hrs,
    BigDecimal breakpress_hrs) {

        this.po_id = po_id;
        this.po_number = po_number;
        this.po_due_date = po_due_date;
        this.po_part_id = po_part_id;
        this.part_quantity = part_quantity;
        this.part_id = part_id;
        this.part_number = part_number;
        this.part_decription = part_decription;
        this.plasma_hrs = plasma_hrs;
        this.grind_hours = grind_hours;
        this.mill_hrs = mill_hrs;
        this.breakpress_hrs = breakpress_hrs;

    }

Answer 1

試試這個參數說明：

List<ShopOrder> getShopOrder(@Param("id") long id);

Answer 2

而不是使用 : po.id = :id 只需使用 ?1....

@Query("SELECT NEW com.htd.domain.ShopOrder(po.id, po.po_number, "
             + "po.due_date, po_part.id, po_part.part_quantity, "
            + "part.id, part.part_number, part.part_description, "
            + "part.plasma_hrs_per_part, part.grind_hrs_per_part, "
            + "part.mill_hrs_per_part, part.brakepress_hrs_per_part) "
            + "FROM Po po "
            + "LEFT JOIN po.partList po_part "
            + "LEFT JOIN po_part.part part "
            + "LEFT JOIN po_part.part where po.id = ?1")
    List<ShopOrder> getShopOrder(Long id);

Answer 3

在本地運行時，在pom中注釋掉這個，重新構建maven項目，然后運行應用。

    <!-- <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency> -->