TableView Filter doesnu00B4t work for added columns

Question

In my model I have a column type SPRAS with a language key, but I want to render the language text so in the iterator I added a new column (hiding the one with the lang key), and I fill this new column with the following code:
  DATA: lang_txt TYPE string.
  DATA: lang_key LIKE sy-langu.
  FIELD-SYMBOLS: <fs> LIKE model->client.
  ASSIGN p_row_data_ref->* TO <fs>.
  lang_key = <fs>-spras.
  SELECT SINGLE sptxt FROM t002t INTO lang_txt
       WHERE spras = sy-langu
       AND   sprsl = lang_key.
  p_replacement_bee = cl_htmlb_textview=>factory(
       id = p_cell_id
       text = lang_txt ).
It works good, but the problem comes because filtering doesn´t work with this column.
Adding a new column to the model would be a solution but I don´t like it very much, it´d be better to solve this problem here in a class associated with the view/rendering od the data instead of changing the model.
Best Regards!
Jonathan.

Answer 1

You can't use a column for filtering which isn't acutally present in your table. With an iterator you only control/change the rendering of your tableview, but the table data stays the same. (Unless you change the data, which would make the iterator useless?) You can not filter values that are not present in your table.
So, if you want to filter an iterator-changed column, make sure the column contains data to sort/filter, and also provide a way for the user to be able to use the filter (as it doesn't make much sense to enter a filter value when the displayed data does not correspond to the table data.
Have a look at this thread, it describes how you can add a dropdown to your filter:
TableView: Filter as Dropdown
Now if you alter this dropdown generating code to use your descriptive text (that you use in your iterator for display in column) as dropdown display values, then you should have a working filter for your tableview.
Max
(goes off writing the weblog promised in the mentioned thread)