the Datagrid don't display

[gwadity]

Hi,

I want to display the data of a table with the next columns

• id
• name
• countryId
  And the column 'countryId' is an integer but in the example country is an string
  i don't know what i hav to write
• $grid->addColumn('countryId', 'Country', 'integer', fetch_pairs($mysqli,'SELECT id, name FROM Country'),true );
• $grid->addColumn('countryId', 'Country', 'string', fetch_pairs($mysqli,'SELECT id, name FROM Country'),true );
  When I test one of the two codes, the datagrid don't display.

What have I to do ?