Whether using PHP or JavaScript (jQuery), when the null value is programmatically filtered in the Grid's column, e.g., {field:"year",value:null,operator:"isnull"}, the Grid operates correctly; however, the column's filter is not set visibly.
This seems to be a bug.
Please note that even overriding the null value with a string "null" and operator "isnull" with "eq" does not help, even though the filter's drop-down-list contains checkbox with a string "null" for both the value and the text.
Whether using PHP or JavaScript (jQuery), when the null value is programmatically filtered in the Grid's column, e.g.,
{field:"year",value:null,operator:"isnull"}
, the Grid operates correctly; however, the column's filter is not set visibly.This seems to be a bug.
Please note that even overriding the null value with a string "null" and operator "isnull" with "eq" does not help, even though the filter's drop-down-list contains checkbox with a string "null" for both the value and the text.