I try to set default values for my columns. My problem is that the default 
value is only a string. I use the migration framework for different 
databases.
Each database has an own dialect for a default value. E.g. Oracle use 
"EMPTY_BLOB()" for an empty binary column and MSSQL use "0x".

I think it is necessary to extend the SqlType class with a method like 
"GetDefaultValue(byte[] value) : DefaultValue" and the Dialect class should 
convert the DefaultValue to an SQL string.

Would my idea fit into the concept?


Am Freitag, 19. Dezember 2014 19:00:11 UTC+1 schrieb Jeffrey Becker:
>
> So here's my conundrum. I'd really like to break the majority of the code 
> out into a separate library; there's a lot of ancillary stuff in there. 
> Because of how baked-in and dialect dependent ddl generation is, I don't 
> think its possible to implement this as purely a layer-on-top.
>
> As I see it there are distinct several components in my work so far:
>
>    - The core ddl generation framework -- an OO framework for 
>    representing ddl operations
>    - The mapping diff engine -- Take two Configurations, look at their 
>    mappings and generate a set of operations which goes from A to B
>    - The migration framework & executor
>    - The fluent builder interface
>    
> I  feel like the first two are things which need to be in the core 
> nhibernate where as the last two are stuff which is obviously better to 
> separate out. 
> On Wednesday, December 10, 2014 8:04:02 AM UTC-5, Gunnar Liljas wrote:
>>
>> I agree with Ricardo. I really like the idea, but it should be in a 
>> separate project.
>>
>> /G
>>
>> 2014-12-10 13:47 GMT+01:00 Jeffrey Becker <jeffrey....@gmail.com>:
>>
>>> I'll fix this shortly.
>>> On Dec 10, 2014 7:45 AM, "Jan Schubert" <xp.dev....@gmail.com> wrote:
>>>
>>>> The fix works great! But the column names are still quoted. I changed 
>>>> this and pushed it as a pull request.
>>>>
>>>> Am Dienstag, 9. Dezember 2014 16:59:41 UTC+1 schrieb Jeffrey Becker:
>>>>>
>>>>> Fixes are in and your pull request is merged in the migrations branch.
>>>>>
>>>>> On Monday, December 8, 2014 3:44:15 AM UTC-5, Jan Schubert wrote:
>>>>>>
>>>>>> What exactly would you change in line 404?
>>>>>>
>>>>>> Am Donnerstag, 4. Dezember 2014 20:30:22 UTC+1 schrieb Jeffrey Becker:
>>>>>>>
>>>>>>> The behavior described seems to be centered in 
>>>>>>> Table.GetThreePartName; Table.cs Line 404.  Stripping out the behavior 
>>>>>>> is 
>>>>>>> causing a lot of unit-test failures which I don't have time to address 
>>>>>>> today.
>>>>>>>
>>>>>>> On Thursday, December 4, 2014 2:05:22 PM UTC-5, Jeffrey Becker wrote:
>>>>>>>>
>>>>>>>> I've found it.  I'm just stripping it out.
>>>>>>>>
>>>>>>>> On Wednesday, December 3, 2014 11:05:14 AM UTC-5, Jan Schubert 
>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>> I have a problem with the SchemaExport class. Without your changes 
>>>>>>>>> for the migration framework, the tables wasn't quoted automaticly. 
>>>>>>>>> So, if I 
>>>>>>>>> use PostgreSQL as database, the table names are upper case. 
>>>>>>>>> PostgreSQL 
>>>>>>>>> enables uppercase names automaticly, if a name is quoted. I need 
>>>>>>>>> lower case 
>>>>>>>>> table names for PostgreSQL and CamelCase names for MSSQL table names. 
>>>>>>>>> I 
>>>>>>>>> have the same problem in my "IMigration" class.
>>>>>>>>>
>>>>>>>>> Is it possible to use the auto-quote setting of NHibernate?
>>>>>>>>>
>>>>>>>>> I try to fix the problem, but I can't do this with my insufficient 
>>>>>>>>> knowledge.
>>>>>>>>>
>>>>>>>>> PS: The last commit of your branch "migrations" is not compilable. 
>>>>>>>>> Some files are missing.
>>>>>>>>>
>>>>>>>>> Am Freitag, 14. November 2014 16:38:44 UTC+1 schrieb Jeffrey 
>>>>>>>>> Becker:
>>>>>>>>>>
>>>>>>>>>> I'd like some feedback on how people feel about the current state 
>>>>>>>>>> of the migrations feature. I've used the existing code in a project 
>>>>>>>>>> and it 
>>>>>>>>>> seems to work pretty well.  That said, I haven't finished all the 
>>>>>>>>>> features 
>>>>>>>>>> that I originally wanted.  The key points I've hit so far are:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>    - Unified DDL generation framework (no weirdness like EF 
>>>>>>>>>>    where different exports generate different sql)
>>>>>>>>>>    - Migration Factory & Version Store
>>>>>>>>>>    - Usable Configuration 
>>>>>>>>>>    - Fluent Builder
>>>>>>>>>>    
>>>>>>>>>> That said, generating migrations auto-magically is turning out to 
>>>>>>>>>> be much more work than I'd originally anticipated.  I think the 
>>>>>>>>>> feature is 
>>>>>>>>>> definitely achievable, I just don't have the time to do it right 
>>>>>>>>>> now.  I'm 
>>>>>>>>>> proud of what the migrations code-base looks like right now.  I 
>>>>>>>>>> think its 
>>>>>>>>>> the right approach. I'm also concerned about having this sit 
>>>>>>>>>> unmerged for 
>>>>>>>>>> too long.  The longer I'm a fork the more work I have to keep track 
>>>>>>>>>> of the 
>>>>>>>>>> upstream. Pending some positive feedback and cleanup work I think 
>>>>>>>>>> I'd like 
>>>>>>>>>> to try to get this merged.  Are people comfortable with this?
>>>>>>>>>>
>>>>>>>>>  -- 
>>>>
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