Обсуждение: ORM

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ORM

От
marcelo
Дата:
For a new big and convoluted project I (am/was) using Devart´s 
LinqConnect as ORM.
But today I experienced some inexplicable "object reference not set to 
an instance of an object" exceptions or other more specific to this 
libraries.
I would wish to change the ORM.
Some experiences would be appreciated. Of course, I prefer open source 
software, at least to chase errors thru debugging.
TIA

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Re: ORM

От
Adrian Klaver
Дата:
On 9/28/18 3:49 PM, marcelo wrote:
> For a new big and convoluted project I (am/was) using Devart´s 
> LinqConnect as ORM.
> But today I experienced some inexplicable "object reference not set to 
> an instance of an object" exceptions or other more specific to this 
> libraries.
> I would wish to change the ORM.
> Some experiences would be appreciated. Of course, I prefer open source 
> software, at least to chase errors thru debugging.

Information that might help folks steer you to alternatives:

1) What programming language(s) are you using?

2) The OS'es involved

3) Are you using any frameworks between the database and the end user?

4) Is an ORM even necessary?


> TIA
> 
> ---
> El software de antivirus Avast ha analizado este correo electrónico en 
> busca de virus.
> https://www.avast.com/antivirus
> 
> 
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com

Re: ORM

От
marcelo
Дата:


On 28/09/2018 21:39 , Adrian Klaver wrote:
On 9/28/18 3:49 PM, marcelo wrote:
For a new big and convoluted project I (am/was) using Devart´s LinqConnect as ORM.
But today I experienced some inexplicable "object reference not set to an instance of an object" exceptions or other more specific to this libraries.
I would wish to change the ORM.
Some experiences would be appreciated. Of course, I prefer open source software, at least to chase errors thru debugging.

Information that might help folks steer you to alternatives:

1) What programming language(s) are you using?
C#, from 4.5 framework.

2) The OS'es involved
Linux for the database server, Windows for client machines.

3) Are you using any frameworks between the database and the end user?
Yes, a very big one, developed by me (or using open source libraries at some spots), which tries to implement MVP pattern. It´s near completely agnostic regarding the DAL layer, but I cannot deny that it may be somewhat influenced by the Devart´s model.

4) Is an ORM even necessary?
Yes; there are around 50 entities and with lots of foreign keys. It´s well worth to have pre-plumbed the code to get "fathers" and "child collections". Ah, and I´m working alone.


TIA

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Re: ORM

От
Adrian Klaver
Дата:
On 9/29/18 6:47 AM, marcelo wrote:
> 
> 
> On 28/09/2018 21:39 , Adrian Klaver wrote:
>> On 9/28/18 3:49 PM, marcelo wrote:
>>> For a new big and convoluted project I (am/was) using Devart´s 
>>> LinqConnect as ORM.
>>> But today I experienced some inexplicable "object reference not set 
>>> to an instance of an object" exceptions or other more specific to 
>>> this libraries.
>>> I would wish to change the ORM.
>>> Some experiences would be appreciated. Of course, I prefer open 
>>> source software, at least to chase errors thru debugging.
>>
>> Information that might help folks steer you to alternatives:
>>
>> 1) What programming language(s) are you using?
> /C#, from 4.5 framework./


Have you looked at:

http://www.npgsql.org/

>>
>> 2) The OS'es involved
> /Linux for the database server, Windows for client machines.//
> /
>> //
>> 3) Are you using any frameworks between the database and the end user?
> /Yes, a very big one, developed by me (or using open source libraries at 
> some spots), which tries to implement MVP pattern. It´s near completely 
> agnostic regarding the DAL layer, but I cannot deny that it may be 
> somewhat influenced by the Devart´s model.//
> /
>> //
>> 4) Is an ORM even necessary?
> /Yes; there are around 50 entities and with lots of foreign keys. It´s 
> well worth to have pre-plumbed the code to get "fathers" and "child 
> collections". Ah, and I´m working alone./
>>
>>
>>> TIA
>>>
>>> ---
>>> El software de antivirus Avast ha analizado este correo electrónico 
>>> en busca de virus.
>>> https://www.avast.com/antivirus
>>>
>>>
>>>
>>
>>
> 
> 
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> 
>     Libre de virus. www.avast.com 
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> 
> 
> 
> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>


-- 
Adrian Klaver
adrian.klaver@aklaver.com

Re: ORM

От
Edson Carlos Ericksson Richter
Дата:
Em 28/09/2018 19:49, marcelo escreveu:
> For a new big and convoluted project I (am/was) using Devart´s 
> LinqConnect as ORM.
> But today I experienced some inexplicable "object reference not set to 
> an instance of an object" exceptions or other more specific to this 
> libraries.
> I would wish to change the ORM.
> Some experiences would be appreciated. Of course, I prefer open source 
> software, at least to chase errors thru debugging.
> TIA
>
> ---
> El software de antivirus Avast ha analizado este correo electrónico en 
> busca de virus.
> https://www.avast.com/antivirus
>
>
>

For .Net I know nothing.
For Java, at other side, EclipseLink is fantastic.

Regards,

Edson.

Re: ORM

От
Dmitry Igrishin
Дата:
сб, 29 сент. 2018 г. в 1:50, marcelo <marcelo.nicolet@gmail.com>:
>
> For a new big and convoluted project I (am/was) using Devart´s
> LinqConnect as ORM.
> But today I experienced some inexplicable "object reference not set to
> an instance of an object" exceptions or other more specific to this
> libraries.
> I would wish to change the ORM.
The best ORM is vanila SQL.

Re: ORM

От
marcelo
Дата:

On 29/09/2018 16:09 , Edson Carlos Ericksson Richter wrote:
> Em 28/09/2018 19:49, marcelo escreveu:
>> For a new big and convoluted project I (am/was) using Devart´s 
>> LinqConnect as ORM.
>> But today I experienced some inexplicable "object reference not set 
>> to an instance of an object" exceptions or other more specific to 
>> this libraries.
>> I would wish to change the ORM.
>> Some experiences would be appreciated. Of course, I prefer open 
>> source software, at least to chase errors thru debugging.
>> TIA
>>
>> ---
>> El software de antivirus Avast ha analizado este correo electrónico 
>> en busca de virus.
>> https://www.avast.com/antivirus
>>
>>
>>
>
> For .Net I know nothing.
> For Java, at other side, EclipseLink is fantastic.
>
> Regards,
>
> Edson.
>
>
Thank you. Do you know about a porting to .NET?


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