arotto8719

Posted on May 21, 2020 • Updated on May 22, 2020

Edit Item in Intellij IDEA

#homecontroller #java #intellij #edititem

@RequestMapping(value="edit/{postId}", method = RequestMethod.GET)
public String displayEditForm(Model model, @PathVariable int postId, Error error){
Artifact thePost = artifactRepository.findById(postId).get();
artifactRepository.save(thePost);
model.addAttribute("thePost", thePost);
return "edit";
}

@RequestMapping(value="edit", method=RequestMethod.POST)
public String processEditForm(@RequestParam(value="post_id") int post_id, @RequestParam(value="name") String name, @RequestParam(value="location") String location, @RequestParam(value="description") String description, Model model) {
    Artifact thePost = artifactRepository.findById(post_id).get();
    thePost.setName(name);
    thePost.setLocation(location);
    thePost.setDescription(description);
    artifactRepository.save(thePost);
    return "index";
}

I need help with this java code. It won't save when I edit an item.

Top comments (17)

Ravi Yasas • May 21 '20

You need to autowire the repository like below

@Autowired
    private ArtifactRepository artifactRepository;

    @RequestMapping(value="edit", method= RequestMethod.POST)
    public String processEditForm(@RequestParam(value="post_id") int post_id, @RequestParam(value="name") String name, @RequestParam(value="location") String location, @RequestParam(value="description") String description, Model model) {

        ThePost thePost = artifactRepository.findById(post_id).get();
        thePost.setName(name);
        thePost.setLocation(location);
        thePost.setDescription(description);
        artifactRepository.save(thePost);
        return "index";
    }

declanTreanor • May 21 '20

in which case the OP would have gotten a Nullpointer, which wasn't shared. A bit more detail would be helpful but, certainly, not autowiring that dependency would cause problems.

arotto8719 • May 21 '20

I have no idea what a null pointer is

arotto8719 • May 21 '20

github.com/arotto8719/app

arotto8719 • May 21 '20

Trying But I’m having trouble uploading photos. Any ideas?

arotto8719 • May 21 '20

github.com/arotto8719/app

The whole code is on here.

Ravi Yasas • May 22 '20

When we are creating a Spring web application, the business logic should be in a separate layer as a Service. So we have Controller, Service, Repositories, and Models. Please check this github.com/raviyasas/spring-boot-hibernate-demo.git

arotto8719 • May 22 '20 • Edited

I have all that on there but I need to know what to put in the exact lines so I can save and edited item.

Something besides the Post or whatever.

I have artifact repository.

Am I supposed to copy and paste what you have or do I have to make mine similar to yours?

Ravi Yasas • May 22 '20

It is better if you can write your own code like mine or you can use my one. It is the best practice to write code in mvc pattern. That is why I mentioned it.

arotto8719 • May 21 '20

I already have that on top of home controller

arotto8719 • May 22 '20

@RequestMapping(value="edit/{post_id}", method=RequestMethod.POST)
public String processEditForm(@RequestParam(value="edit/{post_id}") @PathVariable int post_id, @RequestParam(value="name") String name, @RequestParam(value="location") String location, @RequestParam(value="description") String description, Model model) {
    Artifact thePost = artifactRepository.findById(post_id).get();
    thePost.setName(name);
    thePost.setLocation(location);
    thePost.setDescription(description);
    artifactRepository.save(thePost);
    return "index";
}

This is the problem area. I need exact words and descriptions on what it's supposed to look like.

arotto8719 • May 22 '20

package org.launchcode.app.controllers;

import org.launchcode.app.data.Artifact;
import org.launchcode.app.data.ArtifactRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.Errors;
import org.springframework.web.bind.annotation.*;

import javax.persistence.Id;
import javax.validation.Valid;
import java.util.HashMap;

@Controller
public class HomeController {

@Autowired
private ArtifactRepository artifactRepository;

@RequestMapping(value = "/")
public String index(Model model) {

// model.addAttribute("database", "Database");
// model.addAttribute("images", "Images");
model.addAttribute("add", "Add");
model.addAttribute("search", "Search");
model.addAttribute("edit", "Edit");
model.addAttribute("delete", "Delete");
// model.addAttribute("thePost", thePost);
model.addAttribute("artifacts", artifactRepository.findAll());
HashMap actionChoices = new HashMap<>();
return "index";
}

@GetMapping("add")
public String displayAddArtifactForm(Model model) {
    model.addAttribute(new Artifact());
    model.addAttribute("artifact", new Artifact());
    return "add";
}

@PostMapping("add")
@ResponseBody
public String processAddArtifactForm(@ModelAttribute @Valid Artifact newArtifact,
                                     Errors errors) {
    if (errors.hasErrors()) {
        return "add";
    } else {
        artifactRepository.save(newArtifact);
        return "index";
    }
}

@RequestMapping(value="edit/{postId}", method = RequestMethod.GET)
public String displayEditForm(Model model, @PathVariable int postId, Error error){
    Artifact thePost = artifactRepository.findById(postId).get();
    artifactRepository.save(thePost);
    model.addAttribute("thePost", thePost);
    return "edit";
}

@RequestMapping(value="edit/{post_id}", method=RequestMethod.POST)
public String processEditForm(@RequestParam(value="edit/{post_id}") @PathVariable int post_id, @RequestParam(value="name") String name, @RequestParam(value="location") String location, @RequestParam(value="description") String description, Model model) {
    Artifact thePost = artifactRepository.findById(post_id).get();
    thePost.setName(name);
    thePost.setLocation(location);
    thePost.setDescription(description);
    artifactRepository.save(thePost);
    return "index";
}
@RequestMapping(value = "delete/{id}", method = RequestMethod.GET)
public String delete(@PathVariable("id") int id) {
        artifactRepository.deleteById(id);
    return "index";
}

@GetMapping("view/{artifactId}")
public String displayViewArtifactId(Model model, @PathVariable int Id) {
    return "index";
}

// @GetMapping("view/{Images}")
// public String displayViewImagesId(Model model, @PathVariable int Id) {
// return "images";
// }
}

Ok moving on
This is my entire home controller.

arotto8719 • May 22 '20

Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.
Fri May 22 17:14:24 CDT 2020
There was an unexpected error (type=Bad Request, status=400).
Required int parameter 'edit/{post_id}' is not present
org.springframework.web.bind.MissingServletRequestParameterException: Required int parameter 'edit/{post_id}' is not present
at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.handleMissingValue(RequestParamMethodArgumentResolver.java:204)
at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:114)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:167)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1591)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:830)