anyone who has used oracle knows that the self-increasing id, of oracle is usually implemented by sequence. I only marked @ Id, on the entity and did not mark it to other additional comments. I thought there would be an error in save, but it actually ...
this is a question post with nothing to do, the problem encountered by the beginner of programming, there is no solution, I do not know which seniors have ideas, but also hope to give me some advice. is like this The project uses spring-data-jpa as ...
one class @Entity public class Shuo{ @Id @GeneratedValue private int id; private String title; private Date date; String content; @ManyToOne(cascade = CascadeType.REFRESH) @JoinColumn(name = "user_id") private User user; : @OneT...
https: github.com thymeleaf . I use jpa, to cascade the two classes through annotations. in the html page, when you get the object of any class through the thymeleaf tag, it will appear . java.lang.StackOverflowError: null at sun.reflect.misc.Refl...
there is a set collection of tag classes in the user class; maintain relationships only from the user class, one-to-many @ OneToMany @JoinTable(name="shuo_tag", inverseJoinColumns=@JoinColumn(name="tag_id"), jo...
The routing nesting of vue is displayed according to their respective levels, but usually when developing some management backend, you need to display the first-level menu (first-level routing) on the iframe on the right, but do not want to change the r...
14:13:13] Starting agency:build ... events.js:183 throw er; Unhandled error event ^ Error at new JS_Parse_Error (eval at <anonymous> (D: 0410 wenjian2 gameSystem node_modules _uglify-js@2.6.4@uglify-js tools node.j...
vue element.ui custom table, the prices in multiple input in a row of data are automatically added to calculate the total price as shown in the figure: Code: http: jsrun.net IBhKp embedd... ...
webpack.config.base.js "start": ". node_modules .bin webpack-dev-server --inline --config webpack.dev.config.js" what s wrong with running start; ? The project run cannot be refreshed in real time, and the page can only be refresh...
for example, the statement select * from table_a join table_b on table_a.id=table_b.a_id and table_a.name= smith join table_c where table_a.priority=3 and table_b.seq=8 and table_c.sales=1998; in the operation of embedded loops in concatenated tab...