ExtJS using CheckboxSelectionModel to select multiple rows

I'm new to ExtJS, the version is 3.4.0. Now what I want to do is when I select one row, all the other rows which have the same ''actionId'' will be selected too. Any ideas? Here is part of my code

var xg = Ext.grid;
var checkboxSelector = new xg.CheckboxSelectionModel({
  header: '',
  handleMouseDown: Ext.emptyFn,
  listeners: {
    'rowselect': function(selectionModel, rowIndex, record) {
      var valueSelected = record.get('actionId');
    }
  }
});
var erroneousActionsGrid = new xg.GridPanel({
      id: 'erroneousActionsPanel',
      layout: 'fit',
      store: store,
      cm: new xg.ColumnModel([
        checkboxSelector, {
          header: "Action Name",
          width: 80,
          sortable: true,
          dataIndex: 'actionName'
        }, {
          header: "Action Id",
          width: 30,
          sortable: true,
          dataIndex: 'actionId'
        }, {
          id: 'files',
          header: "File Id",
          width: 30,
          sortable: true,
          dataIndex: 'fileId',
          renderer: function(value, metaData, record, rowIndex, colIndex, store) {
            return '<a href=file/lifeCycleFile/' + value + '>' + value + '</a>';
          }
        }, {
          header: "Task Id",
          width: 30,
          sortable: true,
          dataIndex: 'taskId'
        }, {
          header: "User Name",
          width: 50,
          sortable: true,
          dataIndex: 'userName'
        }, {
          header: "Execute Date",
          width: 30,
          sortable: true,
          dataIndex: 'executeDate',
          renderer: Ext.util.Format.dateRenderer('Y/m/d H:i:s')
        }
      ]),
      bbar: actionListPagingBar,
      plugins: [{
        ptype: 'perpagefield',
        beforeText: ''
      }],
      sm: checkboxSelector,

thanks in advance!