Unable to Render Empty(null) column inside Grid in Extjs

Question

I'm using Extjs for rendering some information inside grid. Columns properties are like:

SEValue: {
        dataIndex: "SEValue",
        header: MCW.lr.s_lbl_sevalue,
        hidden: false,
        renderer: MCW.common.DeviceHelper.renderSEValue,
        infoGroup: 30
    },

Below method is used for manipulation of rendered values:

MCW.common.DeviceHelper.renderSEValue = function (value) {
    if (value) return value;
   return "Not Available";
};

Problem is that, whenever column value is '' or Null in DB, it doesn't show that column and in case of any value it shows the column.

Answer 1

M.b. need in field dataIndex: "SEValue", from which to draw the column's value set allowNull = true?