DataTables Error: “Requested unknown parameter”

Question

I\'m new to the DataTables jquery plugin. After discovering that IE 8 had performance issues with Javascript I decided to change the way I use DataTables to do server side

Answer 1

I ran into the same warning as well, but the cause was different. I had null values in my data. The JSON format was correct, but DataTables does not know have a default rule for displaying nulls. The solution was to use the sDefaultContent property.

Sample aaData:

aaData: [
  { "Field1": "Foo", "Field2":null },
  { "Field1": "Bar", "Field2":null },
]

And then on the aoColumns, you can use the property as follows:

aoColumns: [
  { "mData": "Field1", sDefaultContent: "n/a" },
  { "mData": "Field2", sDefaultContent: "" }
]

This is not your current problem, but you may encounter this issue in the future.

Hope this was helpful.

Answer 2

sDefaultContent option prevents displaying alert boxes only. Data tables wil not find the rule for displaying null values.

Changing null values in the table will eliminate this warning..

Answer 3

If it helps anyone I had a similar error because I had periods in my mRender function name:
My.Namespace.MyFunction(data, row);

This line:
var a = _fnSplitObjNotation( src );

Splits that into separate objects, which obviously generates an error.

Using

My_Namespace_MyFunction(data, row);

Additionally I noticed this error when passing a string function name instead of the JavaScript function object.

Answer 4

To avoid this error, your table number of "th" columns should equal to returning data columns(in numbers), in the above problem it is aaData.

"aaData" : [ 
  [
   "person_id" : "888888",
   "ID" : "999999",
  ],
  [
   "person_id" : "8888889",
   "ID" : "9999990",
  ]
]

This is correct format to return data from server side language. I have solved my problem in same way.

Answer 5

I was having this same problem this morning. You need to have the aoColumns parameter and use mDataProp As in this:

https://gist.github.com/1660712

At least it solved my problem.