How to update specific path of a module from running DS to startup DS about sysrepo HOT 6 CLOSED

Well, you should be able to do that simply by retrieving the specific data from sysrepo (sr_get_data()) and then just using these data for sr_edit_batch(), without involving any XML or JSON data.

from sysrepo.

Then what operation should I use in sr_edit_batch(), "merge" or "replace"?
If I use merge, seems I can't delete item.
If I use replace, seems the whole module will be replaced, that is not I want.

from sysrepo.

If you require specific operations, not just simple merge, then it will not be that simple. You can add operations on the specific paths in the retrieved data (lyd_new_meta(), operation attribute), for example.

from sysrepo.

I tried the following steps, but seems the whole module is replaced, while I only want to update data in "xpath".
Is there anything wrong?

1. sr_get_data(session, xpath, 0, 0, 0, &data)
2. sr_session_switch_ds(session, SR_DS_STARTUP)
3. lyd_print_mem(&xml_str, data->tree, LYD_XML, LYD_PRINT_WITHSIBLINGS | LYD_PRINT_SHRINK);
4. step_load_data(ly_ctx, xml_str, LYD_XML, 0, 0, &node)
5. lyd_new_meta(NULL, node, NULL, "ietf-netconf:operation", "replace", 0, NULL)
6. sr_edit_batch(session, node, "merge")
7. sr_session_switch_ds(session, SR_DS_RUNNING)

from sysrepo.

Please skip step 2 and 3, they are completely redundant. Other than that, perhaps contrary to what one may expect, sr_get_data() always returns a tree starting at the top, not only the XPath you use. So the steps would roughly be:

1. sr_get_data(session, xpath, 0, 0, 0, &data)
2. lyd_find_path(data->tree, xpath, &node)
3. lyd_new_meta(NULL, node, NULL, "ietf-netconf:operation", "replace", 0, NULL)
4. sr_edit_batch(session, data->tree, "merge")

from sysrepo.

It works now, thank you very much!

from sysrepo.