hi there,

I have a set of DB entity class in a library and creating Object from another project which linked with the library returns Null.

I don't know what's wrong there.

the source is like this:

  a. I have a library with such a structure:
     gwlib/source/gwlib/entity/nsconf.d

    with content:

   --------------
    module gwlib.entity.nsconf;

    class NSconf
    {
        String name;
        ...
    }
   --------------

  b. I use this gwlib library in another project named testobj

     testobj/source/app.d :

    --------------
     import gwlib.entity.nsconf;

     void main()
     {
          writeln(Object.factory("gwlib.entity.nsconf.NSConf"));
     }
    --------------

     this print out `null`.

    dub file cofig is :
    -----------------
    "dependencies": {
		"gwlib": {"path":"../gwlib"}
    },
    -----------------

And I just tested with DMD and LDC2, the result is a little different, but all the two is returning a null object.

I don't know what's the reason.


Could someone help with this? Thanks!

  > I posted the dub version of the whole project on github:
    https://github.com/dangbinghoo/DObjectCreatTest
    one can just clone and reproduce the result.


-------
binghoo dang

On Tuesday, 28 May 2019 at 09:25:51 UTC, dangbinghoo wrote:
> 
>     class NSconf
>     {
>         String name;
>         ...
>     }

Does this class have a non-default constructor?

On Tuesday, 28 May 2019 at 09:25:51 UTC, dangbinghoo wrote:
> writeln(Object.factory("gwlib.entity.nsconf.NSConf"));

Typo, should be NSconf.

On Tuesday, 28 May 2019 at 14:16:44 UTC, Nick Treleaven wrote:
> On Tuesday, 28 May 2019 at 09:25:51 UTC, dangbinghoo wrote:
>> 
>>     class NSconf
>>     {
>>         String name;
>>         ...
>>     }
>
> Does this class have a non-default constructor?

yes, I didn't provide constructor, as Class will have a default one if not supplied.

> Typo, should be NSconf.

yeah, I made a typo mistake in the forum post, but the code in github repo is really with no typo problem.

This seems to be a serious problem, I found it works when I using Ldc2 1.12 version even on ARM target.

On Tuesday, 28 May 2019 at 14:24:30 UTC, dangbinghoo wrote:
> On Tuesday, 28 May 2019 at 14:16:44 UTC, Nick Treleaven wrote:
>> On Tuesday, 28 May 2019 at 09:25:51 UTC, dangbinghoo wrote:
>>> 
>
> yeah, I made a typo mistake in the forum post, but the code in github repo is really with no typo problem.
>
> This seems to be a serious problem, I found it works when I using Ldc2 1.12 version even on ARM target.

hi there,

Anyone help with this?

Not a typo problem, even this
-------
	writeln(Object.factory(ns.toString()));
-------

result in `null`.

just try the github demo project:

https://github.com/dangbinghoo/DObjectCreatTest.git



Thanks!
-----------
binghoo dang

Object.factory is pretty unreliable and has few supporters among the developers. I wouldn't suggest relying on it and instead building your own factory functions.

On Wednesday, 29 May 2019 at 02:42:23 UTC, Adam D. Ruppe wrote:
> Object.factory is pretty unreliable and has few supporters among the developers. I wouldn't suggest relying on it and instead building your own factory functions.

oh, that's bad news, but the hibernated library is using this feature. what should I do with this?

On Wednesday, 29 May 2019 at 05:04:54 UTC, dangbinghoo wrote:
> On Wednesday, 29 May 2019 at 02:42:23 UTC, Adam D. Ruppe wrote:
>> Object.factory is pretty unreliable and has few supporters among the developers. I wouldn't suggest relying on it and instead building your own factory functions.
>
> oh, that's bad news, but the hibernated library is using this feature. what should I do with this?

now we found that, class from a module library won't work, if I move gwlib to testobj/source, it works.

change gwlib buildtype to sourceLibrary solves the problem, but it should work for static or shared library.