Trouble building scaffolded site.

Re: Re: Thank you

Re: Re: Thank you

Re: Re: Thank you

Re: Trouble building scaffolded site.

I just uploaded a new version of yesod-platform that updates some of
the dependencies. Can you see if that solves the problem?

On Fri, Jun 1, 2012 at 5:06 AM, Daniel Santa Cruz <dstcruz@...> wrote:
> I'm now unable to build a scaffolded site, with a relatively clean ghc and
> cabal install.  Am not sure what I'm doing wrong. Here are the specifics:
>
>> cd ~/src
>> mkdir yesod-platform-bin
>> cd yesod-platform-bin
>> cabal-dev install yesod-platform
>
>> cd ~/src
>> ./yesod-platform-bin/cabal-dev/bin/yesod init  # project name: project
>> cd project
>> cabal-dev install
> Resolving dependencies...
> cabal: Could not resolve dependencies:
> trying: project-0.0.0 (user goal)
> trying: http-conduit-1.4.1.7 (dependency of project-0.0.0)
> trying: attoparsec-0.10.2.0 (dependency of http-conduit-1.4.1.7)
> next goal: yesod-platform (dependency of project-0.0.0)
> rejecting: yesod-platform-1.0.4.1, 1.0.4, 1.0.3.4, 1.0.3.3, 1.0.3.2, 1.0.2,
> 1.0.1, 1.0.0 (conflict: attoparsec==0.10.2.0, yesod-platform =>
> attoparsec==0.10.1.1)
> rejecting: yesod-platform-0.10.3, 0.10.2 (conflict: project =>
> yesod-platform>=1.0 && <1.1)
>
>> ghc --version
> The Glorious Glasgow Haskell Compilation System, version 7.0.4
>
>> cabal --version
> cabal-install version 0.14.0
> using version 1.14.0 of the Cabal library
>
>> cabal-dev --version
> cabal-dev 0.9.1
> built with Cabal 1.14.0
>
>> ghc-pkg list
> /usr/local/Cellar/ghc/7.0.4/lib/ghc-7.0.4/package.conf.d:
>     Cabal-1.10.2.0
>     array-0.3.0.2
>     base-4.3.1.0
>     bin-package-db-0.0.0.0
>     bytestring-0.9.1.10
>     containers-0.4.0.0
>     directory-1.1.0.0
>     extensible-exceptions-0.1.1.2
>     ffi-1.0
>     filepath-1.2.0.0
>     (ghc-7.0.4)
>     (ghc-binary-0.5.0.2)
>     ghc-prim-0.2.0.0
>     (haskell2010-1.0.0.0)
>     haskell98-1.1.0.1
>     hpc-0.5.0.6
>     integer-gmp-0.2.0.3
>     old-locale-1.0.0.2
>     old-time-1.0.0.6
>     pretty-1.0.1.2
>     process-1.0.1.5
>     random-1.0.0.3
>     rts-1.0
>     template-haskell-2.5.0.0
>     time-1.2.0.3
>     unix-2.4.2.0
>
> /Users/dansan/.ghc/x86_64-darwin-7.0.4/package.conf.d:
>     Cabal-1.14.0
>     HTTP-4000.2.3
>     deepseq-1.3.0.0
>     mtl-2.0.1.0
>     mtl-2.1.1
>     network-2.3.0.13
>     parsec-3.1.2
>     tar-0.3.2.0
>     text-0.11.2.1
>     transformers-0.2.2.0
>     transformers-0.3.0.0
>     zlib-0.5.3.3
>

"Maybe" in a relation

Hi,

I have a declaration of entities like this:

Account
  username String
  infoId OptionalInfoId Maybe

OptionalInfo
  name String
  pet String

Not every Account has an associated OptionalInfo record, so the
`infoId` field in the database may be NULL. When I compile the
application and execute it, however, Yesod first runs this migration:

  ALTER TABLE "Account" ALTER COLUMN "infoId" SET NOT NULL

Since the database contains records where infoId is NULL, the
application crashes.
Why is "Maybe" ignored on `infoId`? Does the relation imply that the
field may not be NULL? Why?

(I'm dealing with an existing PostgreSQL database and I should not
modify the schema too much.)

-- rekado

Re: Trouble building scaffolded site.

The other day I had to replace all the "==" to ">=" in the
dependencies list in yesod-platform.cabal, some packages in the
development build were newer; if ignored, I got broken packages.

Is there a reason why is "==" preferred?

2012/6/1 Michael Snoyman <michael@...>:
> I just uploaded a new version of yesod-platform that updates some of
> the dependencies. Can you see if that solves the problem?
>
> On Fri, Jun 1, 2012 at 5:06 AM, Daniel Santa Cruz <dstcruz@...> wrote:
>> I'm now unable to build a scaffolded site, with a relatively clean ghc and
>> cabal install.  Am not sure what I'm doing wrong. Here are the specifics:
>>
>>> cd ~/src
>>> mkdir yesod-platform-bin
>>> cd yesod-platform-bin
>>> cabal-dev install yesod-platform
>>
>>> cd ~/src
>>> ./yesod-platform-bin/cabal-dev/bin/yesod init  # project name: project
>>> cd project
>>> cabal-dev install
>> Resolving dependencies...
>> cabal: Could not resolve dependencies:
>> trying: project-0.0.0 (user goal)
>> trying: http-conduit-1.4.1.7 (dependency of project-0.0.0)
>> trying: attoparsec-0.10.2.0 (dependency of http-conduit-1.4.1.7)
>> next goal: yesod-platform (dependency of project-0.0.0)
>> rejecting: yesod-platform-1.0.4.1, 1.0.4, 1.0.3.4, 1.0.3.3, 1.0.3.2, 1.0.2,
>> 1.0.1, 1.0.0 (conflict: attoparsec==0.10.2.0, yesod-platform =>
>> attoparsec==0.10.1.1)
>> rejecting: yesod-platform-0.10.3, 0.10.2 (conflict: project =>
>> yesod-platform>=1.0 && <1.1)
>>
>>> ghc --version
>> The Glorious Glasgow Haskell Compilation System, version 7.0.4
>>
>>> cabal --version
>> cabal-install version 0.14.0
>> using version 1.14.0 of the Cabal library
>>
>>> cabal-dev --version
>> cabal-dev 0.9.1
>> built with Cabal 1.14.0
>>
>>> ghc-pkg list
>> /usr/local/Cellar/ghc/7.0.4/lib/ghc-7.0.4/package.conf.d:
>>     Cabal-1.10.2.0
>>     array-0.3.0.2
>>     base-4.3.1.0
>>     bin-package-db-0.0.0.0
>>     bytestring-0.9.1.10
>>     containers-0.4.0.0
>>     directory-1.1.0.0
>>     extensible-exceptions-0.1.1.2
>>     ffi-1.0
>>     filepath-1.2.0.0
>>     (ghc-7.0.4)
>>     (ghc-binary-0.5.0.2)
>>     ghc-prim-0.2.0.0
>>     (haskell2010-1.0.0.0)
>>     haskell98-1.1.0.1
>>     hpc-0.5.0.6
>>     integer-gmp-0.2.0.3
>>     old-locale-1.0.0.2
>>     old-time-1.0.0.6
>>     pretty-1.0.1.2
>>     process-1.0.1.5
>>     random-1.0.0.3
>>     rts-1.0
>>     template-haskell-2.5.0.0
>>     time-1.2.0.3
>>     unix-2.4.2.0
>>
>> /Users/dansan/.ghc/x86_64-darwin-7.0.4/package.conf.d:
>>     Cabal-1.14.0
>>     HTTP-4000.2.3
>>     deepseq-1.3.0.0
>>     mtl-2.0.1.0
>>     mtl-2.1.1
>>     network-2.3.0.13
>>     parsec-3.1.2
>>     tar-0.3.2.0
>>     text-0.11.2.1
>>     transformers-0.2.2.0
>>     transformers-0.3.0.0
>>     zlib-0.5.3.3
>>

Re: "Maybe" in a relation

On Fri, Jun 1, 2012 at 7:47 AM, Ricardo Wurmus
<ricardo.wurmus@...> wrote:
> Hi,
>
> I have a declaration of entities like this:
>
> Account
>  username String
>  infoId OptionalInfoId Maybe
>
> OptionalInfo
>  name String
>  pet String
>
> Not every Account has an associated OptionalInfo record, so the
> `infoId` field in the database may be NULL. When I compile the
> application and execute it, however, Yesod first runs this migration:
>
>  ALTER TABLE "Account" ALTER COLUMN "infoId" SET NOT NULL
>
> Since the database contains records where infoId is NULL, the
> application crashes.
> Why is "Maybe" ignored on `infoId`? Does the relation imply that the
> field may not be NULL? Why?
>
> (I'm dealing with an existing PostgreSQL database and I should not
> modify the schema too much.)
>
> -- rekado

When I run your code, I get:

Migrating: CREATE TABLE "account"("id" SERIAL PRIMARY KEY
UNIQUE,"username" VARCHAR NOT NULL,"info_id" INT8 NULL REFERENCES
"optional_info")

And no ALTER TABLE. Can you provide a reproducing test case that shows
your result?

Michael

Re: Trouble building scaffolded site.

This approach is actually designed to *avoid* dependency hell. So far
it's been mostly successful, but I'm not surprised that there are
hiccups. The only real solution to the problem is fixing
cabal-install, which thankfully has been improving greatly recently.
The new version (0.14.0) has worked much better for me at least.

On Fri, Jun 1, 2012 at 9:19 AM, Carlos López Camey <c.lopez@...> wrote:
> The other day I had to replace all the "==" to ">=" in the
> dependencies list in yesod-platform.cabal, some packages in the
> development build were newer; if ignored, I got broken packages.
>
> Is there a reason why is "==" preferred?
>
> 2012/6/1 Michael Snoyman <michael@...>:
>> I just uploaded a new version of yesod-platform that updates some of
>> the dependencies. Can you see if that solves the problem?
>>
>> On Fri, Jun 1, 2012 at 5:06 AM, Daniel Santa Cruz <dstcruz@...> wrote:
>>> I'm now unable to build a scaffolded site, with a relatively clean ghc and
>>> cabal install.  Am not sure what I'm doing wrong. Here are the specifics:
>>>
>>>> cd ~/src
>>>> mkdir yesod-platform-bin
>>>> cd yesod-platform-bin
>>>> cabal-dev install yesod-platform
>>>
>>>> cd ~/src
>>>> ./yesod-platform-bin/cabal-dev/bin/yesod init  # project name: project
>>>> cd project
>>>> cabal-dev install
>>> Resolving dependencies...
>>> cabal: Could not resolve dependencies:
>>> trying: project-0.0.0 (user goal)
>>> trying: http-conduit-1.4.1.7 (dependency of project-0.0.0)
>>> trying: attoparsec-0.10.2.0 (dependency of http-conduit-1.4.1.7)
>>> next goal: yesod-platform (dependency of project-0.0.0)
>>> rejecting: yesod-platform-1.0.4.1, 1.0.4, 1.0.3.4, 1.0.3.3, 1.0.3.2, 1.0.2,
>>> 1.0.1, 1.0.0 (conflict: attoparsec==0.10.2.0, yesod-platform =>
>>> attoparsec==0.10.1.1)
>>> rejecting: yesod-platform-0.10.3, 0.10.2 (conflict: project =>
>>> yesod-platform>=1.0 && <1.1)
>>>
>>>> ghc --version
>>> The Glorious Glasgow Haskell Compilation System, version 7.0.4
>>>
>>>> cabal --version
>>> cabal-install version 0.14.0
>>> using version 1.14.0 of the Cabal library
>>>
>>>> cabal-dev --version
>>> cabal-dev 0.9.1
>>> built with Cabal 1.14.0
>>>
>>>> ghc-pkg list
>>> /usr/local/Cellar/ghc/7.0.4/lib/ghc-7.0.4/package.conf.d:
>>>     Cabal-1.10.2.0
>>>     array-0.3.0.2
>>>     base-4.3.1.0
>>>     bin-package-db-0.0.0.0
>>>     bytestring-0.9.1.10
>>>     containers-0.4.0.0
>>>     directory-1.1.0.0
>>>     extensible-exceptions-0.1.1.2
>>>     ffi-1.0
>>>     filepath-1.2.0.0
>>>     (ghc-7.0.4)
>>>     (ghc-binary-0.5.0.2)
>>>     ghc-prim-0.2.0.0
>>>     (haskell2010-1.0.0.0)
>>>     haskell98-1.1.0.1
>>>     hpc-0.5.0.6
>>>     integer-gmp-0.2.0.3
>>>     old-locale-1.0.0.2
>>>     old-time-1.0.0.6
>>>     pretty-1.0.1.2
>>>     process-1.0.1.5
>>>     random-1.0.0.3
>>>     rts-1.0
>>>     template-haskell-2.5.0.0
>>>     time-1.2.0.3
>>>     unix-2.4.2.0
>>>
>>> /Users/dansan/.ghc/x86_64-darwin-7.0.4/package.conf.d:
>>>     Cabal-1.14.0
>>>     HTTP-4000.2.3
>>>     deepseq-1.3.0.0
>>>     mtl-2.0.1.0
>>>     mtl-2.1.1
>>>     network-2.3.0.13
>>>     parsec-3.1.2
>>>     tar-0.3.2.0
>>>     text-0.11.2.1
>>>     transformers-0.2.2.0
>>>     transformers-0.3.0.0
>>>     zlib-0.5.3.3
>>>

Re[4]: Re: Multiple static pages

Hello Kirill,

Wednesday, May 30, 2012, 2:39:46 PM, you wrote:

> Bulat, why don't you use Hakyll[1] for that?

thank you for suggestion. those static pages were only the first step,
i'm already adding some intelligence to them. so i'm searching for
application server like node.js 

yesod looks the best choice for me - because i already know haskell,
and because it promises great performance and scalability. now i
use nginx for reverse proxying and static files, plus apache for
ssi/fcgi and hope to replace them all with yesod-based app server

--

-- 
Best regards,
 Bulat                            mailto:Bulat.Ziganshin@...