java - hibernate/jpa criteria, query if an object exists in a many to many relation -


i have class offer many many relation department:

class offer {      @manytomany(fetch = fetchtype.eager, cascade = { cascadetype.merge, cascadetype.refresh })     @jointable(name = "offer_department", joincolumns = @joincolumn(name = "offer_id"), inversejoincolumns = @joincolumn(name = "namecode_id"))     private set<namedcode> department;      ... }

how can use jpa criteriabuilder search offer objects contain department (namedcode).

this should part of greater query (see todo part):

criteriabuilder builder = getsession().getcriteriabuilder(); criteriaquery<offer> criteria = builder.createquery(offer.class); root<offer> root = criteria.from(offer.class);  list<predicate> restrictions = new arraylist<>(); if (fromdate != null && todate != null) {     restrictions.add(builder.between(root.get("entrydate"), fromdate, todate)); } if (department != null) {     // todo check if offer object has assigned passed department } // add more restrictions  criteria.orderby(builder.asc(root.get("entrydate")));

i figured out, have use join after all:

restrictions.add(builder.equal(root.join("department").get("id"), department.getid()));

-

Comments

Post a Comment

Popular posts from this blog

angular - Is it possible to get native element for formControl? -

i've got angular2 reactive form . created formcontrol s , assigned input fields by [formcontrol]=... . understand creates nativeelement <-> formcontrol link. my question: possible nativeelement formcontrol ? wanna myformcontrol.nativeelement.focus() i can share 1 terrible solution works me. in reactive forms can use either 1) formcontroldirective ts mycontrol = new formcontrol('') template <input type="text" [formcontrol]="mycontrol"> or 2) formcontrolname ts myform: formgroup; constructor(private fb: formbuilder) {} ngoninit() { this.myform = this.fb.group({ foo: '' }); } template <form [formgroup]="myform"> <input type="text" formcontrolname="foo"> </form> so these directives write patch like 1) formcontroldirective const originformcontrolngonchanges = formcontroldirective.prototype.ngonchanges; formcontroldirective.proto
Read more

unity3d - Rotate an object to face an opposite direction -

i have object , b. when click on object b, rotates object b (a faces b). b doesn't face a. need following : when faces b, need face opposite direction. have code rotating @ b. how rotate face opposite direction after that? vector3 targetdirection = target - transform.position; float step = speed * time.deltatime; vector3 newdirection = vector3.rotatetowards (turretdome.transform.forward, targetdirection, step, 0.0f); turretdome.transform.rotation = quaternion.lookrotation (newdirection); you object facing object b, want inverse direction of object after that? objecta.transform.rotation = quaternion.inverse(objecta.transform.rotation) but lets assume example turretdome object a, (negate direction): turretdome.transform.rotation = quaternion.lookrotation (-newdirection); naturally, both of these snippets not show how smoothen rotation, seem know how use time.deltatime. just incase unsure, quaternion.lerp this
Read more

javascript - Why jQuery Select box change event is now working? -

i working on product filters user select select box according his/her preference not getting selected value user in jquery. html code:- <select name="product_filter" id="product_filter"> <option value="price_low_first">price : low high</option> <option value="price_high_first">price : high low</option> <option value="latest">latest</option> <option value="popular">most popular</option> </select> jquery code: $(function () { $("#product_filter").change(function () { alert("hi") var selectedtext = $(this).find("option:selected").text(); var selectedvalue = $(this).val(); alert("selected text: " + selectedtext + " value: " + selectedvalue); }); }); hi believe code perfect. once please check jquery.min.js
Read more