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Java Spring with Hibernate Getting Started with CRUD in Spring + Hibernate Add a controller method for saving a new contact

Posted by Morgan Strnad
Morgan Strnad
14,292 Points

Bummer! No `add` method detected that accepts one parameter of type `Contact` and that returns a `String`

What am I getting wrong on this? My objective is: Annotate the controller's add method so that it captures a POST request to "/contacts", and includes a Contact parameter whose value comes from a form submission. Then, before the return statement, use the autowired ContactService field to save the Contact parameter value.

com/teamtreehouse/contactmgr/controller/ContactController.java 
package com.teamtreehouse.contactmgr.controller;

import com.teamtreehouse.contactmgr.service.ContactService;
import com.teamtreehouse.contactmgr.model.Contact;

import org.springframework.stereotype.Controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class ContactController {
  @Autowired
  private ContactService contactService;
  @RequestMapping(value = "/contacts", method = RequestMethod.POST)
  public String add() {
    contactService.save(contact);
    model.addAttribute(contact);
    return "redirect:/contacts/" + contact.getId();  
  }
}

1 Answer

Sergey Podgornyy
Sergey Podgornyy
20,660 Points
Sergey Podgornyy
Sergey Podgornyy
20,660 Points

You forgot to pass parameter to function

@RequestMapping(value = "/contacts", method = RequestMethod.POST)
  public String add(Contact contact) {
    // TODO: Save the Contact object
    contactService.save(contact);
    model.addAttribute(contact);

    return "redirect:/contacts/" + contact.getId();  
  }
Chris Jones
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Chris Jones
Java Web Development Techdegree Graduate 23,933 Points
Chris Jones
.a{fill-rule:evenodd;}techdegree seal-36
Chris Jones
Java Web Development Techdegree Graduate 23,933 Points

I'm sorry, I don't understand why your method above works. Can you help me understand?

The challenge says "Annotate the controller's add method so that it captures a POST request to '/contacts', and includes a Contact parameter whose value comes from a form submission". How does your method capture the Contact object that comes from the form submission? And where does the Model object come from? I don't see it instantiated in the method or passed into the method's parameter.

Overall, could you just explain how your method works?

Here is what I was trying:

@RequestMapping(value = "/contacts", method = RequestMethod.POST)
  public String add(@Valid Contact contact) {
    // TODO: Save the Contact object
    contactService.save(contact);
    return "redirect:/contacts/" + contact.getId();  
  }