我想通過一個所有應該匹配的列表。 @Query("select g.name as name FROM Gym g " +
"LEFT JOIN g.listOfEquipment listOfEquipment " +
"WHERE " +
"(((:listOfEquipment) is null) or listOfEquipment.id in (
我想要一些幫助,試圖做到以下幾點。我想要得到每個用戶在數據庫中按他的名字和id分組的購買次數。但它是非常與簡單的sql相比很難做到。 我在PurchaseRepository下面的代碼擴展的所有IM的CrudRepository @Query("SELECT p.user.name as Name,p.user.id as Id,Count(p) as Purchases from Transac
當我使用addFlashAttribute時,應該如何保存來自POST請求的數據? @GetMapping("/collage")
public String paintPicture(@ModelAttribute(value="picture") String img){
//How to hold 'img' here?
//When I send GET I wan