gopf-devel — Gentle development

Re: [gentle] Gentle 1.5 and PostgreSQL

[Arne L. <arn...@ya...>]

Morten Mertner wrote:

Thanks for your answers. I solved the problem using the latest npgsql-driver (2.0.4). Gentle comes with version 1.0.0... After recompiling Gentle with the latest driver everything works fine without doing any other change.

Thanks 
Arne.

> Hi Arne,
> 
> it looks like an issue with mismatching encodings or possibly wrong
> data type for the database column (doesn't Postgres have an NVarChar
> data type? the VarChar type usually does not allow "special"
> characters).
> 
> If that does not solve it, perhaps this info will help. .NET uses
> UTF-16 (LE) internally and whatever your database uses probably
> depends on the host operating system and schema options. To the best
> og my knowledge the Npgsql provider will convert the string
> appropriately, but you may need to specify an encoding (such as UTF8)
> for the database you're working against (rather than relying on system
> defaults).
> 
> Yours,
> Morten
> 
> 
> On Mar 11, 2009, at 7:46 PM, Arne Lindner wrote:
> 
>> I am new to develop webapps with Gentle and ASP.Net.
>> When using Gentle 1.5 with PostgreSQL everything works fine if I do
>> not use german special characters in string-values to store in
>> database. If I try to store e. g. 'Bärchen' into a varchar-field of
>> the database I got the error message
>> FEHLER: 22021: ungültige Byte-Sequenz für Kodierung »UTF8«:
>> 0xe47263
>>
>> How can I solve this fault?
>>
>> Greetings Arne
>>
>>
>> ------------------------------------------------------------------------------
>> Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM)
>> are
>> powering Web 2.0 with engaging, cross-platform capabilities. Quickly
>> and
>> easily build your RIAs with Flex Builder, the Eclipse(TM)based
>> development
>> software that enables intelligent coding and step-through debugging.
>> Download the free 60 day trial.
>> http://p.sf.net/sfu/www-adobe-com_______________________________________________
>> Gopf-devel mailing list Gop...@li...
>> https://lists.sourceforge.net/lists/listinfo/gopf-devel
> 
> 
> ------------------------------------------------------------------------------
> Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are
> powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
> easily build your RIAs with Flex Builder, the Eclipse(TM)based development
> software that enables intelligent coding and step-through debugging.
> Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com

Re: [gentle] Gentle 1.5 and PostgreSQL

[Morten M. <mo...@me...>]

Hi Arne,

it looks like an issue with mismatching encodings or possibly wrong  
data type for the database column (doesn't Postgres have an NVarChar  
data type? the VarChar type usually does not allow "special"  
characters).

If that does not solve it, perhaps this info will help. .NET uses  
UTF-16 (LE) internally and whatever your database uses probably  
depends on the host operating system and schema options. To the best  
og my knowledge the Npgsql provider will convert the string  
appropriately, but you may need to specify an encoding (such as UTF8)  
for the database you're working against (rather than relying on system  
defaults).

Yours,
Morten


On Mar 11, 2009, at 7:46 PM, Arne Lindner wrote:

> I am new to develop webapps with Gentle and ASP.Net.
> When using Gentle 1.5 with PostgreSQL everything works fine if I do  
> not use german special characters in string-values to store in  
> database. If I try to store e. g. 'Bärchen' into a varchar-field of  
> the database I got the error message
> FEHLER: 22021: ungültige Byte-Sequenz für Kodierung »UTF8«:  
> 0xe47263
>
> How can I solve this fault?
>
> Greetings Arne
>
>
> ------------------------------------------------------------------------------
> Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM)  
> are
> powering Web 2.0 with engaging, cross-platform capabilities. Quickly  
> and
> easily build your RIAs with Flex Builder, the Eclipse(TM)based  
> development
> software that enables intelligent coding and step-through debugging.
> Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com_______________________________________________
> Gopf-devel mailing list
> Gop...@li...
> https://lists.sourceforge.net/lists/listinfo/gopf-devel

Re: [gentle] Gentle 1.5 and PostgreSQL

[Bennett Y. <ben...@gm...>]

It should be a PostgreSQL error message. Please try to use unicode data type
(nvarchar/nchar) or use the correct charset to create the database if you
want to use varchar/char data type. I have no idea about German special
characters (I am a Chinese user). I think you should use try different
iso-8859-x charset (from iso-8859-1 to iso-8859-15) because these charsets
contains most of European characters in many languages.

You can find the list of *PostgreSQL Character Sets* in the following URLs:
http://www.postgresql.org/docs/8.0/interactive/multibyte.html
http://www.postgresql.org/docs/8.1/interactive/multibyte.html
http://www.postgresql.org/docs/8.2/interactive/multibyte.html
http://www.postgresql.org/docs/8.3/interactive/multibyte.html

Hope it may help you.

Bennett

On Thu, Mar 12, 2009 at 2:46 AM, Arne Lindner <arn...@ya...>wrote:

> I am new to develop webapps with Gentle and ASP.Net.
> When using Gentle 1.5 with PostgreSQL everything works fine if I do not use
> german special characters in string-values to store in database. If I try to
> store e. g. 'Bärchen' into a varchar-field of the database I got the error
> message
> FEHLER: 22021: ungültige Byte-Sequenz für Kodierung »UTF8«: 0xe47263
>
> How can I solve this fault?
>
> Greetings Arne
>
>
>
>
> ------------------------------------------------------------------------------
> Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are
> powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
> easily build your RIAs with Flex Builder, the Eclipse(TM)based development
> software that enables intelligent coding and step-through debugging.
> Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
> _______________________________________________
> Gopf-devel mailing list
> Gop...@li...
> https://lists.sourceforge.net/lists/listinfo/gopf-devel
>
>


-- 
Work Hard, Play Hard

[gentle] Gentle 1.5 and PostgreSQL

[Arne L. <arn...@ya...>]

I am new to develop webapps with Gentle and ASP.Net.
When using Gentle 1.5 with PostgreSQL everything works fine if I do not use german special characters in string-values to store in database. If I try to store e. g. 'Bärchen' into a varchar-field of the database I got the error message
FEHLER: 22021: ungültige Byte-Sequenz für Kodierung »UTF8«: 0xe47263

How can I solve this fault?

Greetings Arne

Re: [gentle] Bug in Gentle 1.5.0

[Morten M. <mo...@me...>]

Hi Bill,

> I'm assuming you mean the Microsoft Entity Framework? I'm not sure if
> this is the place for this, but I (for one) would be very interested in
> your opinions of the EF. What does it offer that Gentle.NET does not?
> What are its strengths and weaknesses? How does it perform/scale? Why
> did you choose it (if you were involved in the decision)?

My primary source of income is from being instructor on various .NET
programming classes (mostly but not exclusively MOC material), so I
try to force-feed myself most new things that come out ;)

EF is Microsoft's first bid (not counting everything that was never
really released) at producing an ORM and if they follow up on promises
to make it a first-class citizen in many of their business-line products
(like MOSS, SQL Server, etc) then it will soon be unavoidable anyway. It
also builds on LINQ and the whole F#/lambda she-bang, which is really
clever and something I wanted to experiment with anyway.

Before I get to EF I'd like to comment that I actually started out by
trying NHibernate with Castle ActiveRecord, but either I wasn't
competent enough to figure it out or it's a hopeless framework. I
spent inordinate amounts of time doing fairly simple stuff and in the
end wasn't very pleased with anything but it's ability to auto-create
the database schema. YMMW ;)

To keep this post within a reasonable length, I've listed various key
points in response to your questions. Let me know if you want me to
elaborate on any of them.

EF pro/con:
+ Graphical designer (buggy/unfinished but already nice as is)
- Beta2 will not serialize entity graphs (but final will according to
  blogs), and so is unsuitable for WCF.
+ LINQ for queries = type safety = good.
- Because LINQ is unified across many targets there's no option to
  specify the kind of join you want (always an inner join). This is
  likely to cause some frustration here and there.
- Many standard LINQ operators unsupported at this time (which
  translates into not being able to use database queries for some
  filtering tasks).
- Objects are change-tracked; this is both a plus because EF can be
  clever at times, but makes stuff more complicated when you aren't
  using the same tracker instance (which you won't be for stateless
  applications, e.g. ASP.NET and WCF stuff). Since I do mostly web
  development this is a minus although it's supposedly a feature.
  It also sometimes forces you to retrieve objects (or cache their
  entity key) just to be able to add a relation or child entity.
o I find myself writing helper methods for CRUD and other operations.
  Complex queries are fairly easy to compose although some Googling
  is required to figure out the exact syntax. I'm still undecided
  whether this is good or bad, but think there is room for the code
  generator to provide more assistance for simple/obvious things.
+ It's easy to do both lazy and eager loading, as well as static
  sorting (sort key embedded as part of query).
- Dynamic sorting based on string parameter is only possible by
  constructing a custom lambda expression (complex but reusable).
- No enum support (yet), not even in queries. No casting inside
  queries either so working with enums is bothersome.
+ Reasonably fast. Although I have no numbers to back this up my
  initial experience is that performance is good.
+ Model generator (schema -> entity model). Final is supposed to also
  support the other way around.
o Code generator produces big single file. Nicer to include in VS
  projects but not very nice for locating/inspecting things. I wish
  they'd generate an entire Model project with individual files in it.
- Still quite a few bugs and limitations in the current beta.

EF vs Gentle:
- I really dislike that you have to be connected to the data store to
  compose a query.
+ Because the code generator analyzes the schema there is no runtime
  overhead for this as there is with Gentle. OTOH is has to parse lots
  of XML so it might not be much ;-)
- Because you have to be connected to the data store to compose
  queries there is a tendency for the data layer to seep upwards unless
  you explicitly create helper classes to keep it out.
+ LINQ, designer support, joins and complex queries, lazy/eager
  loading, type-safe queries, etc. All scores for EF.
o No NullValue support. It's a primitive solution but nonetheless
  works rather well (except for bools). Using Nullable<T> leads to lots
  of HasValue/Value checks which I find is smelly code.

That's all I can think of right now ;)

Yours,
Morten

Re: [gentle] Bug in Gentle 1.5.0

[Bill S. <bso...@id...>]

Hi Morten,

I'm assuming you mean the Microsoft Entity Framework? I'm not sure if
this is the place for this, but I (for one) would be very interested in
your opinions of the EF. What does it offer that Gentle.NET does not?
What are its strengths and weaknesses? How does it perform/scale? Why
did you choose it (if you were involved in the decision)?

Thanks much,
Bill Sorensen


-----Original Message-----
From: gop...@li...
[mailto:gop...@li...] On Behalf Of Morten
Mertner
Sent: Monday, April 21, 2008 9:59 AM
To: Gentle development
Subject: Re: [gentle] Bug in Gentle 1.5.0

[snip]
given that I'm primarily using Entity Framework myself it's unlikely
that there'll be any improvements beyond this.
[snip]

Re: [gentle] Bug in Gentle 1.5.0

[Morten M. <mo...@me...>]

Hi Bill,

> For our company, we changed [...]
> quite some time ago. I think this was a good move.

I probably should have too, but then it only affected people not
using the analyzer, which I suspect isn't very many.

Yours,
Morten

Re: [gentle] Bug in Gentle 1.5.0

[Bill S. <bso...@id...>]

For our company, we changed

public override long GetDbType( Type type )

in SqlServerFactory (Gentle.Provider.SQLServer) to use:

  else if( type.Equals( typeof(string) ) )
  {
    result = SqlDbType.NVarChar;  // was Text
  }

quite some time ago. I think this was a good move.

Thanks,
Bill Sorensen
 

-----Original Message-----
From: gop...@li...
[mailto:gop...@li...] On Behalf Of Morten
Mertner
Sent: Monday, April 21, 2008 10:07 AM
To: Gentle development
Subject: Re: [gentle] Bug in Gentle 1.5.0

Hi Bill,

> Yes, I had Analyzer set to None. Sorry, I didn't think of that.
> Thanks much for reviewing these!

You're welcome.

Btw, I forgot to mention what might be important to some:

I modified the default type mapping for string (.NET) from Text to
NVarChar, as the test cases would otherwise need additional TableColumn
decorations to work without analyzer. This might affect people who
aren't using the analyzer at all but is generally much nicer as the Text
data type has severe query restrictions.

Yours,
Morten

Re: [gentle] Bug in Gentle 1.5.0

[Morten M. <mo...@me...>]

Hi Bill,

> Yes, I had Analyzer set to None. Sorry, I didn't think of that.
> Thanks much for reviewing these!

You're welcome.

Btw, I forgot to mention what might be important to some:

I modified the default type mapping for string (.NET) from Text to
NVarChar, as the test cases would otherwise need additional
TableColumn decorations to work without analyzer. This might affect
people who aren't using the analyzer at all but is generally much
nicer as the Text data type has severe query restrictions.

Yours,
Morten

Re: [gentle] Bug in Gentle 1.5.0

[Morten M. <mo...@me...>]

Hi Martín,

>> Good news; the change has been checked in to Subversion.
> This will trigger a 1.5.1 release and we'll be back on the road, with
> "periodic" gentle releases. :)

Haha, we'll see. I'm happy to invest a little time fixing bugs when
people can supply me with specifics to guide me, but given that I'm
primarily using Entity Framework myself it's unlikely that there'll
be any improvements beyond this.

> Morten, you can't escape Gentle that easily. ;)

Obviously :) but as long as time permits I enjoy working on it.
Always fun to revisit old code (cough, cough ;-)

> Ok; I was dreaming.

[Morten swings into a suit and puts on a CEO cap]

Codeworks will be happy to have Morten spend his time developing Gentle
features. I'm sure a very reasonable rate can be negotiated for such
custom developments ;-)

[Morten swings back into comfy gear]

Such a nice boss to have! ;)

Yours,
Morten

Re: [gentle] Bug in Gentle 1.5.0

[Bill S. <bso...@id...>]

Hi Morten,

Yes, I had Analyzer set to None. Sorry, I didn't think of that.

Thanks much for reviewing these!

- Bill Sorensen
 

-----Original Message-----
From: gop...@li...
[mailto:gop...@li...] On Behalf Of Morten
Mertner
Sent: Monday, April 21, 2008 9:48 AM
To: Gentle development
Subject: Re: [gentle] Bug in Gentle 1.5.0

Hi Bill,

thank you for being such a thorough fellow :-)

> TestDateTimeNullValue.TestMinValue - There is no NullValue defined on 
> the TableColumn for the business object.

This should be fine, as Gentle is supposed to assign a default NullValue
when no explicit value is specified.

Additional thinking on this reveals that Gentle only assigns a default
NullValue when the schema analyzer is enabled. Most likely you have
disabled it in the configuration file (the tests did work here with
Analyzer enabled).

I've changed the initialization order in FieldMap so that the default
NullValue isn't overwritten by an unspecified null value (which used to
be what the analyzer would later re-correct). Hence, the analyzer is no
longer required to get proper defaults.

> TestList.TestAnalyzerWithView - The MSSQLServer.sql script does not 
> set up the MailingList view.

MailingList actually maps to a regular table. Fixed by commenting the
test case.

I believe it once did test a view, but my test database doesn't have a
view either. My guess is that someone (myself included) fixed the test
by mapping the MailingList class to the List table rather than by
creating the appropriate database view.

Adding some tests exercising views would be useful, but is somewhat
beyond the quick-fix efforts I do throw at Gentle.

> TestObjectMap.TestMapConstruction - fm.NullValue is null.

> TestPropertyHolder.TestCRUD - Also assumes DateTime.MinValue will 
> result in NULL being written.

Enabling the schema analyzer (or grabbing the latest from Subversion)
will also fix these.

Yours,
Morten

Re: [gentle] Bug in Gentle 1.5.0

[Morten M. <mo...@me...>]

Hi Bill,

thank you for being such a thorough fellow :-)

> TestDateTimeNullValue.TestMinValue - There is no NullValue defined on
> the TableColumn for the business object.

This should be fine, as Gentle is supposed to assign a default
NullValue when no explicit value is specified.

Additional thinking on this reveals that Gentle only assigns a default
NullValue when the schema analyzer is enabled. Most likely you have
disabled it in the configuration file (the tests did work here with
Analyzer enabled).

I've changed the initialization order in FieldMap so that the default
NullValue isn't overwritten by an unspecified null value (which used
to be what the analyzer would later re-correct). Hence, the analyzer
is no longer required to get proper defaults.

> TestList.TestAnalyzerWithView - The MSSQLServer.sql script does not set
> up the MailingList view.

MailingList actually maps to a regular table. Fixed by commenting the
test case.

I believe it once did test a view, but my test database doesn't have
a view either. My guess is that someone (myself included) fixed the
test by mapping the MailingList class to the List table rather than by
creating the appropriate database view.

Adding some tests exercising views would be useful, but is somewhat
beyond the quick-fix efforts I do throw at Gentle.

> TestObjectMap.TestMapConstruction - fm.NullValue is null.

> TestPropertyHolder.TestCRUD - Also assumes DateTime.MinValue will result
> in NULL being written.

Enabling the schema analyzer (or grabbing the latest from Subversion)
will also fix these.

Yours,
Morten

Re: [gentle] log4net version included with Gentle 1.5.0

[Morten M. <mo...@me...>]

Hi Bill,

> FYI, the log4net version included with Gentle 1.5.0 (several places
> in the distribution) is the .NET 1.1 build, not the .NET 2.0 build.

Fixed in Subversion.

Yours,
Morten

[gentle] log4net version included with Gentle 1.5.0

[Bill S. <bso...@id...>]

FYI, the log4net version included with Gentle 1.5.0 (several places in
the distribution) is the .NET 1.1 build, not the .NET 2.0 build.

Re: [gentle] Bug in Gentle 1.5.0

[Martín M. <mar...@gm...>]

On Apr 17, 2008, at 5:25 PM, Morten Mertner wrote:

> Good news; the change has been checked in to Subversion.
This will trigger a 1.5.1 release and we'll be back on the road, with  
"periodic" gentle releases. :)

Morten, you can't escape Gentle that easily. ;)

Ok; I was dreaming.

--
Martin Marconcini
"A complex part of programming doesn't even involve writing code. I am  
referring to the interaction between computer programs and people.  
User interaction is a complex subject that has been the subject of  
many books." Annonymous.

Re: [gentle] Bug in Gentle 1.5.0

[Bill S. <bso...@id...>]

I set up a test database using the MSSQLServer script and got most of
the official Gentle.NET 1.5.0 framework unit tests to run after setting
up a Gentle.config and disabling all the non-MSSQL tests. (I wasn't
testing caching or uniquing, either.)

Four tests still failed. I believe the TableColumn attribute is defined
incorrectly on one of the test business objects, and the script did not
set up a required view. In other words, these are test bugs, not bugs in
Gentle.

Details:

TestDateTimeNullValue.TestMinValue - There is no NullValue defined on
the TableColumn for the business object.

TestList.TestAnalyzerWithView - The MSSQLServer.sql script does not set
up the MailingList view.

TestObjectMap.TestMapConstruction - fm.NullValue is null.

TestPropertyHolder.TestCRUD - Also assumes DateTime.MinValue will result
in NULL being written.

Just an FYI for anyone trying to get the tests to work.

Thanks,
Bill Sorensen
Objects and Infrastructure
Integrated DNA Technologies 

-----Original Message-----
From: gop...@li...
[mailto:gop...@li...] On Behalf Of Morten
Mertner
Sent: Thursday, April 17, 2008 10:25 AM
To: Gentle development
Subject: Re: [gentle] Bug in Gentle 1.5.0

Hi Bill,

> Thank you! That makes the test results consistent. (I did not do 
> extensive additional testing, though.)

Good news; the change has been checked in to Subversion.

Yours,
Morten

Re: [gentle] Bug in Gentle 1.5.0

[Morten M. <mo...@me...>]

Hi Bill,

> Thank you! That makes the test results consistent. (I did not do
> extensive additional testing, though.)

Good news; the change has been checked in to Subversion.

Yours,
Morten

Re: [gentle] Bug in Gentle 1.5.0

[Bill S. <bso...@id...>]

Thank you! That makes the test results consistent. (I did not do
extensive additional testing, though.)

-Bill Sorensen


-----Original Message-----
From: gop...@li...
[mailto:gop...@li...] On Behalf Of Morten
Mertner
Sent: Wednesday, April 16, 2008 5:56 PM
To: Gentle development
Subject: Re: [gentle] Bug in Gentle 1.5.0

[snip]

Without having tested the code, I believe changing line 123 of CM to the
following will fix the problem:

if( fm.NullValue != null ||
    ( row[ i ] != null &&
      fm.Type != row[ i ].GetType() &&
      ! fm.IsGenericNullableType ) )

In the ideal world one would instead check that the type argument of the
nullable type matches the row type, but that is left as an exercise for
the reader in case the above fix works ;)

Yours,
Morten

Re: [gentle] Bug in Gentle 1.5.0

[Morten M. <mo...@me...>]

Hi Bill,

> A coworker (Neil McEntaggart) suggested the following alternative to eliminate the string constant:
>  
>   return memberType.IsGenericType &&
> (memberType.GetGenericTypeDefinition() == typeof(Nullable<>));

Much nicer, thanks! Fixed in Subversion.

> This bug was rather difficult to locate; there appears to be an
> issue with the isPerfectMatch field in ConstructorMap. When public
> IEntity Construct( object[] row, PersistenceBroker broker ) is
> called, isPerfectMatch can return different values for the same
> business object and row values. Our unit tests (separate from the
> Gentle.NET tests) would fail sometimes due to the generic bug
> (isPerfectMatch was false, so GetParams was called) but would
> succeed if run individually (isPerfectMatch would then return true).
> Given the same persistent object and the same row, I would think
> isPerfectMatch would not vary.

Hmm, it's not perfectly clear to me what the cause could be for this, but
two things do come to mind. The first is that Gentle caches the
ConstructorMap instance, and that its field values are determined
using the column names and associated row values passed in initially.
When the same column names are encountered later the cached CM is
retrieved and reused under the assumption that the data row will be
compatible.

My best guess is that because Gentle does not convert data read from
the database to nullable types, the CM might get initialized
erroneously if the initial row contains data and later rows contain
nulls (and possibly vice versa too).

Without having tested the code, I believe changing line 123 of CM to
the following will fix the problem:

if( fm.NullValue != null ||
    ( row[ i ] != null &&
      fm.Type != row[ i ].GetType() &&
      ! fm.IsGenericNullableType ) )

In the ideal world one would instead check that the type argument of
the nullable type matches the row type, but that is left as an
exercise for the reader in case the above fix works ;)

Yours,
Morten

Re: [gentle] Bug in Gentle 1.5.0

[Bill S. <bso...@id...>]

Hi Morten,
 
Thanks for updating that - I don't have much experience with Subversion.
 
I ran into another bug, this one in the FieldMap class:
 
  public bool IsGenericNullableType
  { get { return memberType.FullName.StartsWith( "System.NullableType" )
&& memberType.IsGenericType; }

The type names will actually start with just "System.Nullable".
 
A coworker (Neil McEntaggart) suggested the following alternative to
eliminate the string constant:
 
  return memberType.IsGenericType &&
(memberType.GetGenericTypeDefinition() == typeof(Nullable<>));
 
This bug was rather difficult to locate; there appears to be an issue
with the isPerfectMatch field in ConstructorMap. When public IEntity
Construct( object[] row, PersistenceBroker broker ) is called,
isPerfectMatch can return different values for the same business object
and row values. Our unit tests (separate from the Gentle.NET tests)
would fail sometimes due to the generic bug (isPerfectMatch was false,
so GetParams was called) but would succeed if run individually
(isPerfectMatch would then return true). Given the same persistent
object and the same row, I would think isPerfectMatch would not vary.
 
Thanks again,
Bill Sorensen
Objects and Infrastructure
Integrated DNA Technologies

________________________________

From: gop...@li...
[mailto:gop...@li...] On Behalf Of Morten
Mertner
Sent: Wednesday, April 16, 2008 3:38 PM
To: Gentle development
Subject: Re: [gentle] Bug in Gentle 1.5.0


Hi Bill,

Thanks - fixed in Subversion. I changed the GetDefaultProvider() to call
the destination method directly as it saves a method call.

As for the C# 3.0'isms.. to the best of my knowledge these are compiler
improvements and not CLR improvements, so the code will run fine on .NET
2.0 despite the use of more modern constructs. For instance, you can use
the "var" keyword or the ?? operator and the code still runs fine on a
2.0 CLR. You will need to use the VS 2008 compiler though (aka csc.exe
from .NET 3.5), but since the project files are VS 2008 this shouldn't
be a major problem.

Yours,
Morten



On Wed, Apr 16, 2008 at 9:44 PM, Bill Sorensen <bso...@id...>
wrote:


	In ProviderFactory.cs:
	 
	  public static IGentleProvider GetProvider( Type type )
	  {
	   NamespaceProvider np =
NamespaceProviders.GetNamespaceProvider( type );
	   if( np != null )
	   {
	    return GetProvider( np.ProviderName, np.ConnectionString,
np.Schema );  // BUG
	   }
	   else
	   {
	    // use the default provider
	    return GetProvider( null, null );
	   }
	  }
	
	The marked line needs to pass a null as the initial parameter to
call the correct overload. Here's the corrected source (I also changed
the call to get the default provider):
	 
	  public static IGentleProvider GetProvider( Type type )
	  {
	   NamespaceProvider np =
NamespaceProviders.GetNamespaceProvider( type );
	 
	   if( np != null )
	   {
	    return GetProvider( null, np.ProviderName,
np.ConnectionString, np.Schema );
	   }
	   else
	   {
	     return GetDefaultProvider();
	   }
	  }
	 
	 
	Bill Sorensen
	Objects and Infrastructure
	Integrated DNA Technologies


	
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-- 
Yours,
Morten 

Re: [gentle] Bug in Gentle 1.5.0

[Morten M. <mo...@me...>]

Hi Bill,

Thanks - fixed in Subversion. I changed the GetDefaultProvider() to call the
destination method directly as it saves a method call.

As for the C# 3.0'isms.. to the best of my knowledge these are compiler
improvements and not CLR improvements, so the code will run fine on .NET 2.0
despite the use of more modern constructs. For instance, you can use the
"var" keyword or the ?? operator and the code still runs fine on a 2.0 CLR.
You will need to use the VS 2008 compiler though (aka csc.exe from .NET
3.5), but since the project files are VS 2008 this shouldn't be a major
problem.

Yours,
Morten


On Wed, Apr 16, 2008 at 9:44 PM, Bill Sorensen <bso...@id...> wrote:

>  In ProviderFactory.cs:
>
>   public static IGentleProvider GetProvider( Type type )
>   {
>    NamespaceProvider np = NamespaceProviders.GetNamespaceProvider( type );
>    if( np != null )
>    {
>     return GetProvider( np.ProviderName, np.ConnectionString, np.Schema
> );  // BUG
>    }
>    else
>    {
>     // use the default provider
>     return GetProvider( null, null );
>    }
>   }
> The marked line needs to pass a null as the initial parameter to call the
> correct overload. Here's the corrected source (I also changed the call to
> get the default provider):
>
>   public static IGentleProvider GetProvider( Type type )
>   {
>    NamespaceProvider np = NamespaceProviders.GetNamespaceProvider( type );
>
>    if( np != null )
>    {
>     return GetProvider( null, np.ProviderName, np.ConnectionString,
> np.Schema );
>    }
>    else
>    {
>      return GetDefaultProvider();
>    }
>   }
>
>
> Bill Sorensen
> Objects and Infrastructure
> Integrated DNA Technologies
>
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference
> Don't miss this year's exciting event. There's still time to save $100.
> Use priority code J8TL2D2.
>
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> _______________________________________________
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>


-- 
Yours,
Morten

[gentle] Bug in Gentle 1.5.0

[Bill S. <bso...@id...>]

In ProviderFactory.cs:
 
  public static IGentleProvider GetProvider( Type type )
  {
   NamespaceProvider np = NamespaceProviders.GetNamespaceProvider( type
);
   if( np != null )
   {
    return GetProvider( np.ProviderName, np.ConnectionString, np.Schema
);  // BUG
   }
   else
   {
    // use the default provider
    return GetProvider( null, null );
   }
  }

The marked line needs to pass a null as the initial parameter to call
the correct overload. Here's the corrected source (I also changed the
call to get the default provider):
 
  public static IGentleProvider GetProvider( Type type )
  {
   NamespaceProvider np = NamespaceProviders.GetNamespaceProvider( type
);
 
   if( np != null )
   {
    return GetProvider( null, np.ProviderName, np.ConnectionString,
np.Schema );
   }
   else
   {
     return GetDefaultProvider();
   }
  }
 
 
Bill Sorensen
Objects and Infrastructure
Integrated DNA Technologies

Re: [gentle] Gentle 1.5.0 released!

[Bill S. <bso...@id...>]

Thanks Morten!

Just FYI, there are some .NET 3.0-isms in the 1.5.0 source code. There
aren't many, but it does take a few minutes to get the code to compile
under .NET 2.0.

Thanks,
Bill Sorensen 

-----Original Message-----
From: gop...@li...
[mailto:gop...@li...] On Behalf Of Morten
Mertner
Sent: Friday, March 14, 2008 11:43 AM
To: Gentle
Subject: [gentle] Gentle 1.5.0 released!

Hi All,

I've made a project wrap-up release that updates Gentle to .NET 2.0
(project files are updated to Visual Studio 2008).

It adds support for generic access methods and I did a few tests that
indicate NullableType<T> support is also working (YMMW).

Additionally, it contains bugfixes and improvements made since the last
release almost 2 years ago as well as updated provider libraries. Note
that the included libraries are all for 32-bit .NET 2.0 platforms, so
depending on your deployment target you may need to recompile against a
different version.
 
I want to extend special thanks to everybody on this list - I know you
wanted Gentle to succeed and I appreciate all the effort you've poured
into making it so.

I also wish to apologize for keeping your hopes up that Gentle 2 would
ever be released - being independent does mean you have to be more
careful with how you spend your time and Gentle 2 was just too big a
chunk of work for me to tackle. It got close, but never really made it. 
Sigh! :o)

I hope we will meet again working on some other interesting project! :-)

PS: I've turned list moderation on to get rid of spam, so there might be
slight delays before any posts appear. Also note that I'll be shutting
down the list entirely in another month or so.

Yours,
Morten


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Re: [gentle] Gentle 1.5.0 released!

[Morten M. <mo...@me...>]

Hi Martin,


> I'd like to thank you for all these years of hard work and patience.
> Gentle did certainly change the way I developed. I still use it these
> days, compiled with warnings and all under 2.0.
>

1.5.0 compiles cleanly (almost anyway; it still uses 2 deprecated methods
that I didn't want to touch).

Well, you know how to find me and I know how to find you so this is
> not a goodbye but rather a "see you later". :)
>
> I still owe you e beer.


You do indeed :D .. Maybe TechEd 2008?

P.D.: I think that -if possible- it would be great to have the prj
> files for VS2005 (that is, if VS2008 files are not backwards
> compatible, I know for sure that 2005-2003 were not).


Too late =)

In any case, Gentle should compile nicely with just the Express edition that
you can download for free. VS 2008 also supports cross-compilation so people
can compile for their preferred target framework from a single set of
project files.


> To the rest of the people on this list, thank for your time and
> support as well. As long as we keep using Gentle, it won't die. :)
>
 There's always the off chance that someone decides to pick up development
or uses it as inspiration for producing something even more useful ;-)

I know I'll still be using it whenever I need an SQLite backend or for
prototyping stuff.

Yours,
Morten

Re: [gentle] Gentle 1.5.0 released!

[Martin M. <ma...@ma...>]

Dear Morten & All,

I'd like to thank you for all these years of hard work and patience.  
Gentle did certainly change the way I developed. I still use it these  
days, compiled with warnings and all under 2.0.

Well, you know how to find me and I know how to find you so this is  
not a goodbye but rather a "see you later". :)

I still owe you e beer.


P.D.: I think that -if possible- it would be great to have the prj  
files for VS2005 (that is, if VS2008 files are not backwards  
compatible, I know for sure that 2005-2003 were not).

To the rest of the people on this list, thank for your time and  
support as well. As long as we keep using Gentle, it won't die. :)


Yours,

--
Martin Marconcini
"A complex part of programming doesn't even involve writing code. I am  
referring to the interaction between computer programs and people.  
User interaction is a complex subject that has been the subject of  
many books." Annonymous.