Databases
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    <p>*I'm using <a href="http://docs.jboss.org/hibernate/validator/5.1/reference/en-US/html_single/" rel="nofollow noreferrer">Hibernate Validator APIs</a> to validate my beans. To preserve form data along with displaying error messages, you need to do these 3 things:</p> <ol> <li>Annotate your bean (eg. @NotEmpty, @Pattern, @Length, @Email etc.)</li> </ol> <p><img src="https://i.stack.imgur.com/spEsB.png" alt="enter image description here"></p> <ol start="2"> <li><p>Inside controller:</p> <p>@Controller public class RegistrationController {</p> <pre><code>@Autowired private RegistrationService registrationService; @RequestMapping(value="register.htm", method=RequestMethod.GET, params="new") public String showRegistrationForm(Model model) { if (!model.containsAttribute("employee")) { model.addAttribute("employee", new Employee()); } return "form/registration"; } @RequestMapping(value="register.htm", method=RequestMethod.POST) public String register(@Valid @ModelAttribute("employee") Employee employee, BindingResult bindingResult, RedirectAttributes redirectAttributes) { if (bindingResult.hasErrors()) { redirectAttributes.addFlashAttribute("org.springframework.validation.BindingResult.employee", bindingResult); redirectAttributes.addFlashAttribute("employee", employee); return "redirect:register.htm?new"; } registrationService.save(employee); return "workspace"; } // .... </code></pre> <p>}</p></li> <li><p>Update your view/jsp to hold error messages:</p></li> </ol> <p><img src="https://i.stack.imgur.com/Ku0kS.png" alt="enter image description here"></p> <p>This <a href="http://gerrydevstory.com/2013/07/11/preserving-validation-error-messages-on-spring-mvc-form-post-redirect-get/*" rel="nofollow noreferrer">article</a> can surely be helpful.</p>
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    1. POSpringMVC controller: how to stay on page if form validation error occurs
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    1. COWhile this link may answer the question, it is better to include the essential parts of the answer [here](http://meta.stackexchange.com/a/8259) and provide the link for reference. Link-only answers can become invalid if the linked page changes.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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