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ODataService CallFunction

CallFunction action is used to execute OData FunctionImport or ActionImport.

The properties defined in Action are also applicable to this action.

ODataService CallFunction Properties

Property Type Required
Headers object Optional
RequestOptions RequestOptions Optional
Target CallFunctionTarget Required
_Type const Required


Custom headers to be included as part of the request to the OData Service in key/value pair format

  • type: object


Options for processing of data requests



  • type: const

The value of this property must be equal to:



  1. CallFunction action returns an empty string in the offline mode. The App user needs to upload the pending changes to the backend to complete the transaction. Offline mode can support HTTP POST, PUT, PATCH/MERGE, and DELETE requests. It does not support GET requests because GET requests are executed locally and there is no way to predict or simulate what the GET response will be when executed on the backend. Similarly, other HTTP requests (POST, PUT, PATCH, DELETE) made locally have no impact on the local data, again, because the effect cannot be predicted in the way that the effect for standard CRUD operations can.

  2. CallFunction will store the results in the ActionBinding automatically. The App can bind it to Control directly like the example below. The parameter Target is the CallFunction name and case senstive.

  "ObjectCell": {
    "Footnote": "{CategoryName}",
    "Title": "{CategoryID}"
  "Target": "{GetOneCategory}",
  "_Name": "SectionObjectCollection0",
  "_Type": "Section.Type.ObjectCollection"

Action Result

Refer to the MDK Guide to understand what an action result is.

The success ActionResult of this action is of a JS primitive type, object or a JS array. The failure ActionResult is an error message.


  "_Type": "Action.Type.ODataService.CallFunction",
  "Target": {
    "Function": {
      "Name": "UpdateCustomerDetail",
      "Parameters": {
        "FirstName": "Lewis",
        "LastName": "Black",
        "Emails": [
        "Address": {
          "Street": "187 Suffolk Ln.",
          "City": "Boise"
    "Service": "/MyMDKApp/Services/MyOData.service"