hibernate - What is the best way to map data of junction table in Java entity? -


I have three tables that present my very simple project. 

  make table company (id INT) not original primary key AUTO_INCREMENT, name VARCHAR (250)) Faucet; Create table worker (id INT not original primary key AUTO_INCREMENT, name VARCHAR tap (250)); Make Table Company (Employee) (Company_ID not INT, Employee_ID not INT, Rent_Data Date, Error Zero, Regina_Data DATE DEFUILT Faucet, Foreign Key (company_id) Reference Company (ID), Foreign Key (employee_id) Reference Person (ID);   
 and I have Java rendering  
  @ entity @Table (name = "employee") public class employee serialjob {@Id @GeneratedValue (strategy = generation) Type AOTO) integer ID; @column (name = "name") string name; @ManyToMany (mapped = "employee") private list & lt; Company & gt; Companies; @Entity @Table (name = "company") operates a public class company serializable {@Id @GeneratedValue (strategy = GenerationType.AUTO) private integer ID; @column (name = "name") private string name; @ManyToMany (fetch = FetchType.EAGER, cascade = CascadeType.ALL) @JoinTable (name = "company_ employee", included column = {@JoinColumn (name = "company_id")}, inverseJoinColumns = {@JoinColumn (name = "employee_id ")}) Private Collections & lt; Employee & gt; Employees;   
 I do not know where I can store history data. In the history data, I will have to store fare, agginess will be needed and all the companies of every amplicy must also be stored. So my question is, can I manage such kind of information and what is the best way to store history history?   "post-text" itemprop = "text"> 
 There are many relationships with these qualities for many I believe that you can understand how to deal with this one basic example :

Comments

Post a Comment

Popular posts from this blog

Verilog Error: output or inout port "Q" must be connected to a structural net expression -

I get the error every time, I try to compile. I'm not sure why anyone can help is? I'm new to verilog. Module D_FF (clerk, d, reset_n, q); Input D, Clack, reset_en; Output Q; reg Q; lab4_gdl f1 (.lk (~ clk), d (d), .q.m (qm)); lab4_GDL f2 (.Clk (Clk), D (QM), .Q (Q)); Always start at @ (posedge clk, neggeous reset_n) (Reset_n == 0) Q & lt; = 0; Other questions & lt; = D; Edit End: The problem is what we are asking to do: In this section, you apply the memory / registration circuit on the AlterEdie 2 board. will do. The circuit has the following specifications: The present value of swift SW15-0 on the D2 board should be shown in four hexadecimal four sections of HEX3-0. This part of the circuit will be combination logic. To use an active-less asynchronous reset and KEY1 to use KEY0 as the clock input, you must store SW15-0in in a 16-bit register in the value The register should be enabled to have a 16-bit positive edge, which uses the embedded D flip-flo
Read more

jasper reports - How to center align barcode using jasperreports and barcode4j -

I use iReport 5.5.0 . How to align a barcode component to the center The relevant piece of my jrxml is below & Lt; JR: Code 128 xmlns: JR = "http://jasperreports.sourceforge.net/jasperreports/components" xsi: schemaLocation = "http://jasperreports.sourceforge.net/jasperreports/components http: //jasperreports.sourceforge Purge / xsd / components.xsd "textPosition =" bottom "& gt; & Lt; Jr: codeExpression & gt; & Lt; [CDATA [$ F {number}]] & gt; & Lt; / Jr: codeExpression & gt; & Lt; / Jr: Code 128 & gt; & Lt; / componentElement & gt; "Text" itemprop = "text"> Create a style after this, it is called "barcode", like: & lt; Style name = "barcode" fontName = "Helvetica" fONTSIZE = "10" hAlign = "center" valign = "center" /> and set the property of your barcode element to "barcode".
Read more

c# - ASP.NET MVC - Attaching an entity of type 'MODELNAME' failed because another entity of the same type already has the same primary key value -

In brief, the wrapper module is inserted during posting and the status of an entry is changed to 'modified' . Before changing the state, the state is set to 'separate', but calling attachments () causes the same error to be thrown away. I am using EF 6. Model / wrapper class public class avi model {public A is a {get; Set; } Public listing & lt; B & gt; B {received; Set; } Public cc {receipt; Set; }} Administrator edit public functioning (int? id) {if (id == null) {new HttpStatusCodeResult (HttpStatusCode.BadRequest); } If (! Conveyor Access (id.Value)) new HTTPTitus code result (HTTP status code. Forbidden); Var aViewModel = new AViewModel (); aViewModel.A = db.As.Find (id); If (aViewModel.Receipt == zero) {return HttpNotFound (); } aViewModel.b = db.Bs.Where (x => x.aid == id.Value) .Oolist (); AViewModel.Vendor = db.Cs.Where (x => x.cid == aViewModel.a.cID) .FirstOrDefault (); See Return (aViewModel); } [HTPFost] [Valid AntitiferousTeacon
Read more