value of defaultSortField in discovery.xml is not considered as default sort field

[saschaszott]

Bug Description

The value of <property name="defaultSortField" ref="xxx" /> is not considered as default sort field. Instead the first list value in <property name="sortFields"> is considered.

This bug is caused by this line in search.component.ts:

dspace-angular/src/app/shared/search/search.component.ts

Line 317 in f53c77b

const defaultSort: SortOptions = searchSortOptions[0];

Steps to reproduce

Change the value of <property name="defaultSortField" ref="sortLastModified" /> to <property name="defaultSortField" ref="sortTitleAsc" /> in discovery.xml (bean with id workspaceConfiguration):

https://github.com/DSpace/DSpace/blob/96ba07197adbced95ffd743295e07bf7bb271953/dspace/config/spring/api/discovery.xml#L751

Restart the backend (reload the changed configuration)

Go to http://your-ds-host/mydspace?configuration=workspace

Observe that the default sort field is NOT changed to Title Ascending.

Expected behavior

In the given example: the default sort field is Title Ascending (sortTitleAsc)