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sop soptwo

Magritte question

Hi,

First of all, please excuze me if it's a stupid question, I'm a newbie with Magritte.

Is there a way to add conditions do descriptions "on the fly"? For example I have an object with descriptions, and when I do asComponent addValidatedForm, I would like to add a condition to a description, but this time only.

Cheers,

Sop

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Ramon Leon-5

RE: Magritte question

ct: Magritte question

>
> Hi,
>
> First of all, please excuse me if it's a stupid question, I'm
> a newbie with Magritte.
>
> Is there a way to add conditions do descriptions "on the
> fly"? For example I have an object with descriptions, and
> when I do asComponent addValidatedForm, I would like to add a
> condition to a description, but this time only.
>
> Cheers,
>
> Sop

buildEditorFor: aModel
^(aModel description
addCondition:[:memento | ];
asComponentOn: aModel)
addValidatedForm;
yourself

Ramon Leon
http://onsmalltalk.com

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sop soptwo

RE: Magritte question

> From: [hidden email]
> To: [hidden email]
> Subject: RE: Magritte question
> Date: Fri, 7 Sep 2007 14:19:31 -0700
>
> ct: Magritte question
> >
> > Hi,
> >
> > First of all, please excuse me if it's a stupid question, I'm
> > a newbie with Magritte.
> >
> > Is there a way to add conditions do descriptions "on the
> > fly"? For example I have an object with descriptions, and
> > when I do asComponent addValidatedForm, I would like to add a
> > condition to a description, but this time only.
> >
> > Cheers,
> >
> > Sop
>
> buildEditorFor: aModel
> ^(aModel description
> addCondition:[:memento | ];
> asComponentOn: aModel)
> addValidatedForm;
> yourself

Thanks, I Tried this :

buildEditorFor: anItem
(anItem description
addCondition: [:item | (Item repository contains: [:each | each id = item id) not];
asComponentOn: anItem)
addValidatedForm;
yourself

It seems to work fine, but the condition dosen't disappear until the session expires.
What am I missing ?
>
> Ramon Leon
> http://onsmalltalk.com
>
>
> _______________________________________________
> SmallWiki, Magritte, Pier and Related Tools ...
> https://www.iam.unibe.ch/mailman/listinfo/smallwiki

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Ramon Leon-5

RE: Magritte question

> Thanks, I Tried this :
>
> buildEditorFor: anItem
> (anItem description
> addCondition: [:item | (Item repository contains: [:each |
> each id = item id) not];
> asComponentOn: anItem)
> addValidatedForm;
> yourself
>
> It seems to work fine, but the condition dosen't disappear
> until the session expires.
> What am I missing ?
> >
> > Ramon Leon
> > http://onsmalltalk.com

Likely that you're using the same component for the entire length of the
session. You may want to copy the description as well, I don't recall if
Magritte still caches its descriptions, so say anItem description copy
addCondtion.

Ramon Leon
http://onsmalltalk.com

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Lukas Renggli-2

Re: Magritte question

> Likely that you're using the same component for the entire length
> of the
> session. You may want to copy the description as well, I don't
> recall if
> Magritte still caches its descriptions, so say anItem description copy
> addCondtion.

Yes, you have to copy the description, else your globally cached
description ends up with a whole set of conditions.

Caching can be disabled by using a different description-builder,
however need the descriptions a lot (e.g. searching, persistency) it
is really worth to let Magritte only build them once and then cache
them.

Lukas

--
Lukas Renggli
http://www.lukas-renggli.ch

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sop soptwo

RE: Magritte question

> From: [hidden email]
> Subject: Re: Magritte question
> Date: Sat, 8 Sep 2007 11:42:15 +0200
> To: [hidden email]
>
> > Likely that you're using the same component for the entire length
> > of the
> > session. You may want to copy the description as well, I don't
> > recall if
> > Magritte still caches its descriptions, so say anItem description copy
> > addCondtion.
>
> Yes, you have to copy the description, else your globally cached
> description ends up with a whole set of conditions.
>
> Caching can be disabled by using a different description-builder,
> however need the descriptions a lot (e.g. searching, persistency) it
> is really worth to let Magritte only build them once and then cache
> them.
>

Thank you for your help.

Now I have another problem :

buildEditorFor: anItem
    ^(anItem description copy
            addCondition: [:memento | (Item repository
                contains: [:each | memento model id = each not]) not]
            labelled: 'An item with that id already exists';
            asComponentOn: anItem)
        addValidatedForm;
        yourself

The memento model id doesn't change it's value when I edit it. I saw MACheckedMemento has a #cache and a #original method, maybe I should use them, but I don't know how.

Sebastien

> Lukas
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
>
>
> _______________________________________________
> SmallWiki, Magritte, Pier and Related Tools ...
> https://www.iam.unibe.ch/mailman/listinfo/smallwiki

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sop soptwo

RE: Magritte question

From: [hidden email]
To: [hidden email]
Subject: RE: Magritte question
Date: Sat, 8 Sep 2007 15:31:57 +0200

> From: [hidden email]
> Subject: Re: Magritte question
> Date: Sat, 8 Sep 2007 11:42:15 +0200
> To: [hidden email]
>
> > Likely that you're using the same component for the entire length
> > of the
> > session. You may want to copy the description as well, I don't
> > recall if
> > Magritte still caches its descriptions, so say anItem description copy
> > addCondtion.
>
> Yes, you have to copy the description, else your globally cached
> description ends up with a whole set of conditions.
>
> Caching can be disabled by using a different description-builder,
> however need the descriptions a lot (e.g. searching, persistency) it
> is really worth to let Magritte only build them once and then cache
> them.
>
Thank you for your help.

Now I have another problem :

buildEditorFor: anItem
    ^(anItem description copy
            addCondition: [:memento | (Item repository
                contains: [:each | memento model id = each not]) not]
            labelled: 'An item with that id already exists';
            asComponentOn: anItem)
        addValidatedForm;
        yourself

Of course it was : contains: [:each | memento model id = each id]) not]

The memento model id doesn't change it's value when I edit it. I saw MACheckedMemento has a #cache and a #original method, maybe I should use them, but I don't know how.

Sebastien

> Lukas
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
>
>
> _______________________________________________
> SmallWiki, Magritte, Pier and Related Tools ...
> https://www.iam.unibe.ch/mailman/listinfo/smallwiki

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Ramon Leon-5

RE: Magritte question

In reply to this post by sop soptwo

> Thank you for your help.
>
> Now I have another problem :
>
> buildEditorFor: anItem
> ^(anItem description copy
> addCondition: [:memento | (Item repository
> contains: [:each | memento model id = each not]) not]
> labelled: 'An item with that id already exists';
> asComponentOn: anItem)
> addValidatedForm;
> yourself
>
> The memento model id doesn't change it's value when I edit
> it. I saw MACheckedMemento has a #cache and a #original
> method, maybe I should use them, but I don't know how.
>
> Sebastien

That's because the memento doesn't write to the model until after it passes
all its validations. You need to check the pending values, which are in the
memento keyed by your descriptions. You don't want to say "memento model
id" in your rule, you want to say "memento cache at: YouModel descriptionId"
to see it's pending value.

Ramon Leon
http://onsmalltalk.com

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sop soptwo

RE: Magritte question

> From: [hidden email]
> To: [hidden email]
> Subject: RE: Magritte question
> Date: Sat, 8 Sep 2007 13:46:46 -0700
>
> > Thank you for your help.
> >
> > Now I have another problem :
> >
> > buildEditorFor: anItem
> > ^(anItem description copy
> > addCondition: [:memento | (Item repository
> > contains: [:each | memento model id = each not]) not]
> > labelled: 'An item with that id already exists';
> > asComponentOn: anItem)
> > addValidatedForm;
> > yourself
> >
> > The memento model id doesn't change it's value when I edit
> > it. I saw MACheckedMemento has a #cache and a #original
> > method, maybe I should use them, but I don't know how.
> >
> > Sebastien
>
> That's because the memento doesn't write to the model until after it passes
> all its validations. You need to check the pending values, which are in the
> memento keyed by your descriptions. You don't want to say "memento model
> id" in your rule, you want to say "memento cache at: YouModel descriptionId"
> to see it's pending value.
>

Thank you very much Ramon !

> Ramon Leon
> http://onsmalltalk.com
>
>
> _______________________________________________
> SmallWiki, Magritte, Pier and Related Tools ...
> https://www.iam.unibe.ch/mailman/listinfo/smallwiki

keith1y

Re: Magritte question

In reply to this post by Lukas Renggli-2

> Yes, you have to copy the description, else your globally cached
> description ends up with a whole set of conditions.
>
> Caching can be disabled by using a different description-builder,
>
Hi Lukas,

Here you are suggesting the idea of providing a specialized
description-builder.

May I take the liberty of pointing out again that since the existing
description builder uses a class var for "Default" rather than a class
instance var as would be preferable for subclassing the existing
description builder.

best regards

Keith
> however need the descriptions a lot (e.g. searching, persistency) it
> is really worth to let Magritte only build them once and then cache
> them.
>
> Lukas
>
>

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Lukas Renggli-2

Re: Magritte question

> May I take the liberty of pointing out again that since the existing
> description builder uses a class var for "Default" rather than a class
> instance var as would be preferable for subclassing the existing
> description builder.

Yes, that's exactly the reason I use a class var ;-)

All the users of a description builder use

MADescriptionBuilder default

If you want to use your own custom description builder, you assign a
different one to be used as default:

MADescriptionBuilder default: SpecialBuilder new

Regards,
Lukas

--
Lukas Renggli
http://www.lukas-renggli.ch

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keith1y

Re: Magritte question

Lukas Renggli wrote:

>> May I take the liberty of pointing out again that since the existing
>> description builder uses a class var for "Default" rather than a class
>> instance var as would be preferable for subclassing the existing
>> description builder.
>>
>
> Yes, that's exactly the reason I use a class var ;-)
>
> All the users of a description builder use
>
> MADescriptionBuilder default
>
> If you want to use your own custom description builder, you assign a
> different one to be used as default:
>
> MADescriptionBuilder default: SpecialBuilder new
>
> Regards,
> Lukas
>
>

Ah I see.

My typical use case is to use my specialized builder in specific
circumstances.
I do a

SpecialBuilder default

to obtain the builder that I want, so I shall change that to
SpecialBuilder instance, instead and have instance as the class instance
var.

thanks

Keith

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keith1y

Re: Magritte question

I have updated the CustomBuilder pacakge and posted it to the
magritteaddons repository.

Could you do me a favour and delete the version mistakenly posted to
pier addons.

many thanks

Keith

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keith1y

Re: Magritte question

Keith Hodges wrote:

> I have updated the CustomBuilder pacakge and posted it to the
> magritteaddons repository.
>
> Could you do me a favour and delete the version mistakenly posted to
> pier addons.
>
> many thanks
>
> Keith
>

actually, hold fire on that, I am struggling to access magritteaddons
for some reason, though pier addons is fine.

Keith

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Lukas Renggli-2

Re: Magritte question

In reply to this post by keith1y

> Ah I see.
>
> My typical use case is to use my specialized builder in specific
> circumstances.
> I do a
>
> SpecialBuilder default
>
> to obtain the builder that I want, so I shall change that to
> SpecialBuilder instance, instead and have instance as the class
> instance
> var.

Indeed. I had a different use-case in mind than you do. Of course we
can have both strategies together.

Lukas

--
Lukas Renggli
http://www.lukas-renggli.ch

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