context node does not contain any elements

[Former Member]

Hi Masters,

I create a node dynamically from structure using CL_WD_DEMO_DYN_MODEL->create_nodeinfo_from_struct method. my code as

nd_field_info = nd_field->get_node_info( ).

wd_this->zwd_assist->create_nodeinfo_from_struct( EXPORTING

parent_info = nd_field_info

structure_name = dotablename

is_multiple = abap_true ).

When am set the data to context then it gives the error like node does not contain any elements, but i verified the attributes using nodeinfo then all attributes will be displayed, but when value inserting time it throws error.

Waiting for Your Response...

Advance Thankyou

Regards,

Sathya

[Former Member · Accepted solution]

Hi sathya ,

the method you using is absolute , the replacement for the methos is if_wd_context_node_info->add_new_child_node

pls refer the sample code to create a dynamic Node .

DATA: pa0001  TYPE REF TO cl_abap_structdescr,
           comp_tab     TYPE cl_abap_structdescr=>component_table,
           struct_type     TYPE REF TO cl_abap_structdescr,

          ls_pa0001   ?= cl_abap_typedescr=>describe_by_name('P0001').
          comp_tab      = p0001->get_components( ).
          struct_type   = cl_abap_structdescr=>create( comp_tab ).

  struct_type = cl_abap_structdescr=>create( comp_tab ).

* now the nodeinfo is created
  node_info = wd_context->get_node_info( ).
  node_info = node_info->add_new_child_node(
    name                         = 'MY_NODE'
    IS_MANDATORY                 = ABAP_true
    IS_MULTIPLE                  = ABAP_true
    STATIC_ELEMENT_RTTI          = struct_type
    IS_STATIC                    = ABAP_false
       ).

refer DEMODYNAMIC component for dynamic creation of node

regards

Chinnaiya P

Edited by: chinnaiya pandiyan on Dec 15, 2010 2:07 PM

[Former Member · Accepted solution]

Hi

Thanqu for response in short time.As your code my problem is solved. Can u explain following code.

 ls_pa0001   ?= cl_abap_typedescr=>describe_by_name('P0001').
 comp_tab      = p0001->get_components( ).
 struct_type   = cl_abap_structdescr=>create( comp_tab ).

[Former Member · Accepted solution]

Hi sathya ,

pls look into the below sdn wiki link . you can get better understanding what the runtime time type service class do

[http://wiki.sdn.sap.com/wiki/display/ABAP/RuntimeTypeServices%28RTTS%29|http://wiki.sdn.sap.com/wiki/display/ABAP/RuntimeTypeServices%28RTTS%29]

there are lot of post regarding thin in SDN

Regards

Chinnaiya P

[Former Member]

Hi

it seems to be the issue of the cardinality. Your node is having attributes but the cardinality might me set to 0:n or 0:1 by default that's why node does not have any element Please make it 1:1 or 1:n as per your requirement.

You need to set IS_MANDATORY = ABAP_TRUE

now if is multiple is true, cardinality is 1:n and if is multiple is false then cardinality is 1:1