why does propertygrid not show my fields with null values

[crafter]

Hi All

I am setting the source of a propertygrid to the records source of an editable grid.

   grid.on('cellclick', function(grid, rowIndex, columnIndex, e) {
        var record = grid.getStore().getAt(rowIndex);  // Get the Record

         this.quickInfoGrid = new Ext.grid.PropertyGrid({
            renderTo:'properties-grid-container',
            autoWidth: true,
            autoScroll: true,
            autoHeight: true,
            enableColumnMove: false,
            stripeRows: true,
            loadMask: true,
         });

   this.quickInfoGrid.setSource(record.json);
   var mysurce = this.quickInfoGrid.setSource(record.json);
   this.quickInfoGrid.render();

   },this); 

Some of the values set in the grid source is set to null. If a list the values in the debugger, for example, the source looks like this:

json     Object id=48 title=Dr. firstname=Benôit surname= ANTHEAUME
active            : "false"
byline            : ""
comments    :    null
date_created : null
designation   : "Institut de Recherche pour le Développement"
email             : ""
firstname      : "Benôit"
homepage    : null
id                  : "48" 

If I look at the propertygrid source (mySource in the code snippet, it shows the null values.

In the propertygrid, fields like byline and email will render, but fields like comments, date_created and homepage will not. If I change the value to the non-null value, then the feilds show.

I cannot figure out why. Do you know what I must do to get the filds to show (other than setting the null values to non-null ones).

Thank you.

[NathanWolf]

I realize this post is very, very old- but I have the same question for extjs4.1

The behavior is still present, and I'm not sure why. I'd like to be able to use a properties grid to edit properties that may be null.

[honzakuchar]

...same question... Or we have to do our custom implementation of PropertyGrid?

and I think problem is in Reader, see this function:
http://docs.sencha.com/ext-js/4-1/source/Store2.html#Ext-grid-property-Store-method-getReader

you will see something like this:

// private
isEditableValue: function(val){
return Ext.isPrimitive(val) || Ext.isDate(val);
}