Jugalam | Create custom fields for a custom entity in the control panel

Indeed, you read correctly—from the control panel, you can make custom fields for custom entities. But hold on, it's not OOTB. For this, you must write a single component class.

Here you go.

In your module, create a component class and include the component declaration listed below.

@Component(property = "javax.portlet.name=" + ObjectPortletKeys.OBJECT_DEFINITIONS, service = CustomAttributesDisplay.class)
Ensure that the class "BaseCustomAttributesDisplay" is extended by yours.

public class ObjectDefinitionCustomAttributesDisplay extends BaseCustomAttributesDisplay

Include the following methods in the class.

@Override
  public String getClassName() {
    return ObjectDefinition.class.getName();//for this class it will add custom field section in control panel 
  }


  @Override
  public String getIconCssClass() {
    return "relationship";
  }

This is how your class will now appear.

import org.osgi.service.component.annotations.Component;

import com.liferay.expando.kernel.model.BaseCustomAttributesDisplay;
import com.liferay.expando.kernel.model.CustomAttributesDisplay;
import com.liferay.object.constants.ObjectPortletKeys;
import com.liferay.object.model.ObjectDefinition;


@Component(property = "javax.portlet.name="
    + ObjectPortletKeys.OBJECT_DEFINITIONS, service = CustomAttributesDisplay.class)
public class ObjectDefinitionCustomAttributesDisplay extends BaseCustomAttributesDisplay {
  
  @Override
  public String getClassName() {
    return ObjectDefinition.class.getName();
  }


  @Override
  public String getIconCssClass() {
    return "relationship";
  } 
}

Deploy this portlet now, then use the control panel to examine the custom field area. There, the object definition will be shown.

Create Custom Fields For A Custom Entity In The Control Panel