crud

I'm trying to learn how to do CRUD operations, but I can't seem to figure out how to update an existing row in my DB. I've gotten the create and delete part working, but I don't really know how to solve the update part. I've googled a lot about it, but I can't find a explanation that I fully understand. import java.util.List; import javax.ejb.Stateless; import javax.persistence.EntityManager; import javax.persistence.EntityTransaction; import javax.persistence.PersistenceContext; import javax.persistence.Query; @Stateless public class Modell { @PersistenceContext(unitName = "mess") private

Say I have a Companies table which has a many-many relationship with an Employees table. I have an add/edit Companies page, but I also want to be able to find/add new/existing Employees as well, without having to open up another CRUD page for each Employee first. I'll be inputting an English name and a Japanese name for each Employee, so the usual trick that blog software uses for editing tags won't be too good. It doesn't need to be too pretty since it's for internal use. What would be a practical way to do this? I'm guessing I should use jQuery, but I hardly know how to use it. I'm familiar

I am trying to use AngularJS $resource to DELETE data from my server. However, when I write the result to console, I do not see the data. However, when I go to "Network" in Chrome's console, I see the DELETE in the Name Path left column. When I click on the "info, I see five tabs on the right panel. Under the Preview and Response tabs, I see the correct data. I just don't know how to see or retrieve that in my Javascript. Here is the javascript service code: var MyServices = angular.module('MyServicesName', ['ngResource']); MyServices.factory('AAAService', function($resource) { return

My requirement is to do a CREATE operation by providing the user with a form in a JSP with input fields from two entities (e.g. UserDetails and EmploymentDetails ) What is the most effective way to update two forms in a single jsp using a single submit? One approach I know of is to combine the two entities into a single wrapper-class and then send that object as Model. Is that the only solution? Kindly guide. It's a common practice to put any number of objects in a wrapper class and use this one to submit data with a single form. Additionally, you can use JSR-303 validation in any of objects:

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Hello Does anybody know of any examples of a Google Web Took (GWT) - based Create Read Update and Delete application. That is, an application which uses the GWT to manipulate and display the contents of a database. Thanks GWT is a client side technology, so basically gives you only the UI. Any CRUD process would happen in the server side, which could be any J2EE code. Anyway you can take a look to the StockWatcher Example which gives you a good approach to your question (you need to implement the server side storage) Also take a look to the RequestFactory documentation Does it help you? There