Free jqGrid restoring date with custom formatter after cancelling inline edit - date

Question

After inline edit is cancelled, the date column comes back as undefined instead of restoring the original value. Column is defined as following (dates are coming in 1970-01-01 format):
{name:'Release<br>Date',index:'Street_Date', sorttype:"date", width:70,
formatter: function (cellvalue, options, rowObject) {
return cellvalue === ('1970-01-01') ? "" : $.fn.fmatter.call(this, "date", cellvalue, options, rowObject);
},
formatoptions: {newformat:'d M y'},
editable:true,
editoptions: {
size:9,
dataInit: function(el, options) {
$(el).datepicker({
dateFormat: "d M y",
defaultDate: '01 Jan 70',
onSelect: function(dateText, inst) {
}
});
}
},
searchoptions: {
sopt: ['eq','ne','ge','le'],
dataInit: function (elem) {
$(elem).datepicker({ showButtonPanel: true, dateFormat: 'yy-mm-dd' })
}
}
},
The inline edit is setup as following:
ondblClickRow: function (rowid) {
var savedRows = $grid.jqGrid("getGridParam", "savedRow");
if (savedRows.length > 0 && savedRows[0].id !== rowid) {
// cancel editing
$grid.jqGrid("restoreRow", savedRows[0].id);
}
if (savedRows.length === 0) {
$grid.jqGrid("editRow", rowid, editOptions);
}
}
When Grid is loaded, the date shown like 07 Aug 18, entering the inline editing by double click, the date is still 07 Aug 18. After cancelling the edit either by clicking away or clicking Cancel button, date becomes NaN undefined N. After refresh, it comes back correctly though.
How to preserve the correct date after cancelling editing?
Grid behaves correctly with formatter: date
free jqGrid v jqGrid 4.13.5

Answer 1

Maybe the author of free-jqGrid will help better, but I would recommend you to add additional parameter (action='edit') when the formatter is called. Code below:
formatter: function (cellvalue, options, rowObject) {
return cellvalue === ('1970-01-01') ? "" : $.fn.fmatter.call(this, "date", cellvalue, options, rowObject, "edit");
},
Note the last parameter in $.fn.fmatter.call
UPDATE
This is working in my tests.
Since you use a custom date fomatter it is needed the value in savedRows to be unformated in order to be saved correct. In case of default formatter = date this is done automatically.
Below is the code that can be used, suppose you know the index of the field in colModel:
ondblClickRow: function (rowid) {
var savedRows = $grid.jqGrid("getGridParam", "savedRow");
if (savedRows.length > 0 && savedRows[0].id !== rowid) {
// cancel editing
savedRows[0].Release_Date = $.unformat.date.call($grid[0], savedRows[0].Release_Date, $grid[0].p.colModel[1]);
$grid.jqGrid("restoreRow", savedRows[0].id);
}
if (savedRows.length === 0) {
$grid.jqGrid("editRow", rowid, editOptions);
}
}