Question

使用JOOQ（使用sqlite3）。

有一些看起来像这样的代码：（根据文档中的示例进行了修改：https://www.jooq.org/doc/latest/manual/sql-execution/fetching/pojos/）

// A "mutable" POJO class
public class MyBook {
  public int id;
  public String title;
}

// Create a new POJO instance
MyBook myBook = new MyBook();
// myBook.id = 10; <-- Id is NOT set here because the database auto-generates it
myBook.title = "Animal Farm";

// Load a jOOQ-generated BookRecord from your POJO
BookRecord book = create.newRecord(BOOK, myBook);

// Insert it (explicitly)
create.executeInsert(book);

// What is value of the auto-generated id?

此时，我需要知道数据库中自动生成的ID。

关于如何获得它的任何想法？
或者在保存之前是否需要设置ID？

Answer 1

使用executeInsert()似乎无法获取ID：

// Insert it (explicitly)
create.executeInsert(book);

但是使用Record.store会：

book.store()

以下是如何从POJO转到Record，以便可以存储PJO，然后使用生成的ID获取更新的POJO：

// A "mutable" POJO class
public class MyBook {
  public int id;
  public String title;
}

// Create a new POJO instance
MyBook myBook = new MyBook();
// myBook.id = 10; <-- Id is NOT set here because the database auto-generates it
myBook.title = "Animal Farm";

// Load a jOOQ-generated BookRecord from your POJO
BookRecord book = create.newRecord(BOOK, myBook);

// Insert it (implicitly) using the BookRecord instead of create.executeInsert()
book.store();            // <--- THIS IS THE KEY DIFFERENCE

// Get new Book POJO from the BookRecord
MyBook newBook = book.into(MyBook.class);

// This is also a handy function to get the Record as Map, 
//   which is easier to view in the debugger
Map<String, Object> bookMap = book.intoMap();

在executeInsert（）之后的JOOQ，需要知道自动生成的ID

1 个答案: