javascript - Cannot read property 'then' of undefined in MdDataTable -

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i'm using mddatatable display data want retrieve server. want use pagination. angular code:

    $scope.paginatorcallback = function(page, pagesize){         var offset = (page-1) * pagesize;          mysrv.getdata.get(             {                 offset: offset,                 pagesize: pagesize             }, function (data) {                 return {                                           results: data.list,                         totalresultcount: data.totalresults                     }             }, function (error) {                alert(error);             }         )     }

this html code:

 <mdt-table     paginated-rows="{isenabled: true, rowsperpagevalues: [5,10,20,50]}"     mdt-row-paginator="paginatorcallback(page, pagesize)"     mdt-row-paginator-error-message="error happened during loading nutritions."     mdt-row="{         'table-row-id-key': 'fields.item_id',         'column-keys': [             'fields.item_name',             'fields.nf_calories',             'fields.nf_total_fat',             'fields.nf_total_carbohydrate',             'fields.nf_protein',             'fields.nf_sodium',             'fields.nf_calcium_dv',             'fields.nf_iron_dv'         ],     }">     <mdt-header-row>         <mdt-column align-rule="left">dessert (100g serving)</mdt-column>         <mdt-column align-rule="right">calories</mdt-column>         <mdt-column align-rule="right">fat (g)</mdt-column>         <mdt-column align-rule="right">carbs (g)</mdt-column>         <mdt-column align-rule="right">protein (g)</mdt-column>         <mdt-column align-rule="right">sodium (mg)</mdt-column>         <mdt-column align-rule="right">calcium (%)</mdt-column>         <mdt-column align-rule="right">iron (%)</mdt-column>     </mdt-header-row> </mdt-table>

it call server , retrieve data correctly (so not problem of server), can't see data in html , have error in console:

angular.js:13708 typeerror: cannot read property 'then' of undefined @ mdtajaxpaginationhelper.fetchpage (http://localhost/vendor/mddatatable/md-data-table.js:629:17) @ new mdtajaxpaginationhelper (http://localhost/vendor/mddatatable/md-data-table.js:586:18) @ object.getinstance (http://localhost/vendor/mddatatable/md-data-table.js:677:24) @ inittablestorageserviceandbindmethods (http://localhost/vendor/mddatatable/md-data-table.js:208:85) @ new mdttablecontroller (http://localhost/vendor/mddatatable/md-data-table.js:197:17) @ object.invoke (http://localhost/vendor/angular/angular.js:4709:19) @ $controllerinit (http://localhost/vendor/angular/angular.js:10234:34) @ nodelinkfn (http://localhost/vendor/angular/angular.js:9147:34) @ http://localhost/vendor/angular/angular.js:9553:13 @ processqueue (http://localhost/vendor/angular/angular.js:16170:28) undefined


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