Thymeleaf list within list input

Question

I have a data structure like this :-

WorkHistory{
    List jobs;
}
Jobs{
   List workDoneSentences;
}

Basically, I am

Answer 1

<td><a class="btn btn-primary btn-md" id="work_done0" name="work_done0"  th:href="Modal">Work done</a></td>

The Modal part should be configured per your own demand

Answer 2

I've tried as follows and it works properly.

Template: Create unique "modal" for each job. (work-list.html)

<form method="post" action="#" th:action="@{/work-list}" th:object="${workHistoryDetails}">
 <table>
  <thead>
   <tr>
    <th>
      <button type="submit" name="addRow" th:text="'Add Row'">Add row</button>
    </th>
   </tr>
  </thead>
  <tbody>
   <tr id='addr_work0' th:each="workRow, rowStat : *{jobs}">
    <td th:text="${rowStat.index + 1}"></td>
      <td><input type="text" 
                placeholder='Company Name'  class="form-control" th:field="*{jobs[__${rowStat.index}__].companyName}"/></td>
      <td><input type="text" 
                placeholder='Company city' class="form-control" th:field="*{jobs[__${rowStat.index}__].city}"/></td>


      <td><button type="button" class="btn btn-primary" data-toggle="modal" th:attr="data-target='#myModal'+${rowStat.index}" >Open modal</button></td>

      <!-- The Modal -->
      <div class="modal fade" th:id="'myModal'+${rowStat.index}">
       <div class="modal-dialog">
        <div class="modal-content">

         <!-- Modal Header -->
         <div class="modal-header">
           <h4 class="modal-title">Modal Heading</h4>
           <button type="button" class="close" data-dismiss="modal">&times;</button>
         </div>

         <!-- Modal body -->
         <div class="modal-body">
           <input type="text"
                placeholder='Company Name'  class="form-control" th:field="*{jobs[__${rowStat.index}__].workDoneSentences[0]}"/>
           <input type="text" 
                placeholder='Company city' class="form-control" th:field="*{jobs[__${rowStat.index}__].workDoneSentences[1]}"/>
         </div>

         <!-- Modal footer -->
         <div class="modal-footer">
           <button type="button" class="btn btn-danger" data-dismiss="modal">Close</button>
         </div>

        </div>
       </div>
      </div>
    </tr>
   </tbody>
  </table>
 <input type="submit" name="submit" value="Add" class="btn btn-danger" />
</form> 

Controller:

@ModelAttribute("workHistoryDetails")
public WorkHistory populateWorkHistories() {
    return this.workHistory.getAllHistoryDetail();
}

@Autowired
WorkHistoryService workHistory;

@GetMapping("/work-list")
public String greeting(final WorkHistory workHistoryDetails) {
    return "work-list";
}

@RequestMapping(value="/work-list",method=RequestMethod.POST)
public String create(final WorkHistory workHistoryDetails) {

   this.workHistory.setJobs(workHistoryDetails);
   return "work-list";
}

// for adding new row job to jobs list
@RequestMapping(value="/work-list", params={"addRow"})
public String addRow(final WorkHistory workHistoryDetails, Model model) {

    Jobs jobRow = new Jobs("","",new ArrayList<>());
    workHistoryDetails.getJobs().add(jobRow);
    model.addAttribute("workHistoryDetails", workHistoryDetails);
    return "work-list";
}

Service: Just for the sake of testing:

@Service
public class WorkHistoryService {

    static WorkHistory workHistoryDetails =new WorkHistory();
    static{
        List<String> workDones = new ArrayList<>();
        workDones.add("angular");
        workDones.add("description");
        List<String> workDones1 = new ArrayList<>();
        workDones1.add("java,c++");
        workDones1.add("description also");

        Jobs job1 = new Jobs("Twitter", "USA",workDones); 
        Jobs job2 = new Jobs("Microsoft", "USA",workDones1);
        List<Jobs> jobList = new ArrayList<>();
        jobList.add(job1);
        jobList.add(job2);
        workHistoryDetails.setJobs(jobList);
    }

    public WorkHistory getAllHistoryDetail(){

        return workHistoryDetails;
    }

    public void setJobs(WorkHistory workHistory){
        workHistoryDetails.getJobs().clear();
        List<Jobs> jobs = workHistory.getJobs();
        for (Jobs job : jobs) {
            workHistoryDetails.getJobs().add(job);
        }
    }
}

Jobs domain:

public class Jobs {
   private String companyName;
   private String city;
   private List<String> workDoneSentences;
    //default constructor important!   
    public Jobs() {
    super();
    }
   //setter getter
}

I hope it helps you.