Call a "Service Method" from a DataAbstractService

Data Abstract
1

Hello,
I am trying to call a “Service Method” that is stored in a DataAbstractService class.
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The _intf file is also created correctly and the call can be included.
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Everything works but when I try to implement functions or even prodedures in the data module I get an exception on client access violation.

What am I doing wrong… or do I have a thinking error

2

Hi,

Can you create a simple testcase that reproduces this issue, pls?
you can attach it here or drop email to support@ for keeping privacy.

btw, how did you create CodeFirst version of DataAbstractService - manually or via conversion wizard?

3

with the conversion wizard…

4

Ok,
anbei ein Demo mit der gleichen vorgehensweise wie in meiner Applikation.
Erstellt mit Wizzard dann in Code First convertiert.

DemoApp.zip (67.3 KB)

5

Sorry Text in English

Ok,
Here is a demo with the same procedure as in my application.
Created with Wizerd then converted to Code First

6

Hi,

You have used the same GUID for both services:

  [ROService('DataService', '{7C8217D5-B91C-40CA-AF70-7218427B34D0}')]
  [RONamespace('DemoApp')]
  TDataService = class(TDataAbstractService)

  [ROService('DemoService', '{7C8217D5-B91C-40CA-AF70-7218427B34D0}')]
  [RONamespace('DemoApp')]
  TDemoService = class(TDataAbstractService)

as a result, it returns IDataService instance instead of IDemoService and it causes this issue.

workaround:

  • change guid (or even remove it as):
  [ROService('DemoService')]
  • regenerate Interface files from .remoteRODL
  • retest
7

Oops … sorry in stupid careless mistake … thanks for your help …