[FIXED] Thymeleaf access field of class

Issue

I have a class, called A with multiple fields, and another class called B that has an object of class A. In the form the th:object is of class B Then in the html file I want to get the input using thymeleaf for a field in class A in th:field So normally I would do th:field="*{field}", but the field is not inside class B it is inside class A...so how do i do th:field="{B.Aobj.field}" please? I have tried

Solution

You don't need to add A to the model. You can access attributes of child objects just by adding extra dots .. For example, if your classes look like this:

class Directions {
  private int miles;
  private Location source;
  private Location destination;

  // all the getters and setters
}

class Location {
  private String name;
  private String address;
  
  // all the getters and setters
}

You can access both A and B's attributes by dot-walking.

<form th:object="${directions}">
  <!-- properties of a -->
  <input type="text" th:field="*{miles}" />

  <!-- properties of b -->
  <input type="text" th:field="*{source.name}" />
  <input type="text" th:field="*{source.address}" />

  <input type="text" th:field="*{destination.name}" />
  <input type="text" th:field="*{destination.address}" />
</form>

Answered By - Metroids
Answer Checked By - David Marino (JavaFixing Volunteer)