how to assign default value to attribute?

[Former Member]

is it possible to assign a default value to a given attribute of a node instance upon creation?

e.g. when a new instance of a node is created, i always want an attribute to contain a certain default value...

cheers

--MIKE

[cyclingfisch_]

Hi Mike,

you can create a determination which is triggered on create. In this determination you can set values.

Cheers,

Martni

[Former Member]

Which release? We are on SAP_BW_FND 7.31 SP 4 and i cannot see the trigger "on create"...

[Former Member]

Hi Mike,

For Martins solution you need to set the request node on create and only on create:

And Then configure under node category assignement after modify (and also only after modify):

But for node default values there is a better approach provided: The node class

In the conf_ui you can configure a node class on node level:

There you can enter a class which implements the interface /BOBF/IF_FRW_NODE. This interface provides a method for setting node default values:

Kind Regards

Aiko

[Former Member]

any ideas, why this code is not working?

  data:
    root_records        type /sesi/t_mw_root,
    root_record         type ref to /sesi/s_mw_root.



  io_read->retrieve( exporting iv_node      = is_ctx-node_key
                               it_key       = it_key
                               iv_fill_data = abap_true
                     importing et_data      = root_records ).

  loop at root_records reference into root_record.
    root_record->state = 'A'.

    io_modify->update( iv_node = is_ctx-node_key
                       iv_key  = root_record->key
                       is_data = root_record ).
  endloop.

the node instance is created, but attribute STATE remains initial...

[cyclingfisch_]

yes, you have to declare which attributes you want to change.

Use the parameter IT_CHANGED_FIELDS of the update method for that.

[Former Member]

thanks martin. doesnt work ... sorry...

  data:
    root_records        type /sesi/t_mw_root,
    root_record         type ref to /sesi/s_mw_root,
    changed_field       type line of /bobf/t_frw_name,
    changed_fields      type /bobf/t_frw_name.


  io_read->retrieve( exporting iv_node      = is_ctx-node_key
                               it_key       = it_key
                               iv_fill_data = abap_true
                     importing et_data      = root_records ).


  changed_field = 'STATE'.
  insert changed_field into table changed_fields.


  loop at root_records reference into root_record.
    root_record->state = 'A'.

    io_modify->update( iv_node           = is_ctx-node_key
                       iv_key            = root_record->key
                       is_data           = root_record
                       it_changed_fields = changed_fields ).
  endloop.

[cyclingfisch_]

For me the code looks good at first sight.

But it is better to use the constants for the attribute names instead of a text literal.

There should be a generated constant interface for your business object and you can find the attributes there:

<constant interface of your BO>=>sc_node_attribute-root-state

[Former Member]

I use the constant now, but it does not work... any other suggestions?

[Former Member]

Which way did you choose? Via Determination or Node Class? Did you set a Break-Point in the code and checked, if he stopped there during creation of an instance?

[Former Member]

I implemented a Node class. I can see that all this is running successfully in debugger, but unfortunately, nothing is really changed in the newly created node instance...