Using PIL in a method of a content type

3 messages

Jan Pokorny () Using PIL in a method of a content type

Reply Threaded

Hello,

I have a custum content type "SightFolder" with a field "img" of
"image" type. I would like to use some PIL transformations on the
image saved in the image field, so I have added a method into the
content type class. But all my attempts fail.

I import PIL as:

from PIL import Image

A field is defined as:

ImageField(
name='img',
widget=ImageField._properties['widget'](
label="Map",
),
searchable=0,
required=0,
storage=AnnotationStorage(),
),

A method in the class is defined as:

security.declarePublic('Rotate')
def Rotate(self, img):
out = img.rotate(45)
return out

And I try to call it from a template as:



But i generates the following error:

Module Products.PageTemplates.ZRPythonExpr, line 49, in __call__
- __traceback_info__: context.Rotate(context.img).tag()
Module PythonExpr, line 1, in <expression>
Module Products.Sightseeing.SightFolder, line 142, in Rotate
AttributeError: rotate

Do you have any idea what is wrong? Is there any better way how to
input an image from a field into a method?

Thanks a lot for any help in advance.

Jan

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Zdych Lukáš () Re: Using PIL in a method of a content type

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Hi Jan,

it seems that your issue is that you are trying to call PIL's
image object's method "Rotate" on Archetypes ImageField instance which
can't work for sure .. but you should have a look at your current
ATContentTypes package where these operations are already implemented
somewhere in the module: Products.ATContentTypes/Products/
ATContentTypes/lib/imagetransform.py

Btw: These operations would be accessable easily if you include
ATContentTypes.content.image.Image class as one of your's class parent
or you can use these transforms directly maybe .. but all that depends
on what is your goal.

Kind Regards

Lukas

On Aug 11, 2009, at 11:12 PM, Jan Pokorný wrote:

> Hello,
>
> I have a custum content type "SightFolder" with a field "img" of
> "image" type. I would like to use some PIL transformations on the
> image saved in the image field, so I have added a method into the
> content type class. But all my attempts fail.
>
> I import PIL as:
>
> from PIL import Image
>
> A field is defined as:
>
> ImageField(
> name='img',
> widget=ImageField._properties['widget'](
> label="Map",
> ),
> searchable=0,
> required=0,
> storage=AnnotationStorage(),
> ),
>
> A method in the class is defined as:
>
> security.declarePublic('Rotate')
> def Rotate(self, img):
> out = img.rotate(45)
> return out
>
> And I try to call it from a template as:
>
> python:context.Rotate(context.img).tag()">
>
> But i generates the following error:
>
> Module Products.PageTemplates.ZRPythonExpr, line 49, in __call__
> - __traceback_info__: context.Rotate(context.img).tag()
> Module PythonExpr, line 1, in <expression>
> Module Products.Sightseeing.SightFolder, line 142, in Rotate
> AttributeError: rotate
>
> Do you have any idea what is wrong? Is there any better way how to
> input an image from a field into a method?
>
> Thanks a lot for any help in advance.
>
> Jan
>
>
>
>
> _______________________________________________
> Product-Developers mailing list
> [hidden email]
> http://lists.plone.org/mailman/listinfo/product-developers

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Espen Moe-Nilssen () Re: Using PIL in a method of a content type

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Some javascript/style in this post has been disabled (why?)

You could maybe call the "action" rotate "after the object is created.

There is also a product called "Image Cropping Field" (?) that might be worth taking a look at (=to see how pil is used here)

Not too much related, but take a look at Products.Imageeditor, a great product

Espen Moe-Nilssen

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Den 11. aug. 2009 kl. 23.32 skrev Zdych Lukáš:

Hi Jan,

it seems that your issue is that you are trying to call PIL's image object's method "Rotate" on Archetypes ImageField instance which can't work for sure .. but you should have a look at your current ATContentTypes package where these operations are already implemented somewhere in the module: Products.ATContentTypes/Products/ATContentTypes/lib/imagetransform.py

Btw: These operations would be accessable easily if you include ATContentTypes.content.image.Image class as one of your's class parent or you can use these transforms directly maybe .. but all that depends on what is your goal.

Kind Regards

Lukas

On Aug 11, 2009, at 11:12 PM, Jan Pokorný wrote:

Hello,

I have a custum content type "SightFolder" with a field "img" of "image" type. I would like to use some PIL transformations on the image saved in the image field, so I have added a method into the content type class. But all my attempts fail.

I import PIL as:

from PIL import Image

A field is defined as:

 ImageField(
 name='img',
 widget=ImageField._properties['widget'](
 label="Map",
 ),
 searchable=0,
 required=0,
 storage=AnnotationStorage(),
 ),

A method in the class is defined as:

 security.declarePublic('Rotate')
 def Rotate(self, img):
out = img.rotate(45)
return out

And I try to call it from a template as:



But i generates the following error:

Module Products.PageTemplates.ZRPythonExpr, line 49, in __call__
- __traceback_info__: context.Rotate(context.img).tag()
Module PythonExpr, line 1, in <expression>
Module Products.Sightseeing.SightFolder, line 142, in Rotate
AttributeError: rotate

Do you have any idea what is wrong? Is there any better way how to input an image from a field into a method?

Thanks a lot for any help in advance.

Jan

_______________________________________________
Product-Developers mailing list
[hidden email]
http://lists.plone.org/mailman/listinfo/product-developers

_______________________________________________
Product-Developers mailing list
[hidden email]
http://lists.plone.org/mailman/listinfo/product-developers

_______________________________________________
Product-Developers mailing list
[hidden email]
http://lists.plone.org/mailman/listinfo/product-developers