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Dolmen content-type extension : image

Project description

menhir.contenttype.image provides an image-centered content type for Dolmen based Grok applications.


The menhir.contenttype.image Image content provides a custom schema, extending the IDescriptiveSchema interface, from

>>> from import IDescriptiveSchema
>>> from menhir.contenttype.image import IImage

>>> IImage.isOrExtends(IDescriptiveSchema)

The IImage interface describes the image field, that is to store the uploaded image data. The field comes from dolmen.file:

>>> for attr, doc in IImage.namesAndDescriptions():
...   print attr, ':', doc
image : <dolmen.file.field.ImageField object at ...>


The menhir.contenttype.image Image content uses a ZODB Blob to store the data. The image attribute of the factory class, Image, is a blob property from dolmen.blob:

>>> from menhir.contenttype.image import Image
>>> Image.image
< object at ...>

The instanciation is fairly straightforward:

>>> import os.path
>>> path = os.path.join(os.path.dirname(__file__), 'image.png')

>>> imagefile = open(path)
>>> image = Image(title=u"My Image", image=imagefile)
>>> imagefile.close()

The factory is protected by a common right:

>>> from dolmen.content import require
>>> print require.bind().get(image)


The content registers an icon, thanks to the package:

>>> from zope.component import getMultiAdapter
>>> from zope.publisher.browser import TestRequest

>>> request = TestRequest()
>>> icon = getMultiAdapter((image, request), name="icon")
>>> print icon
<zope.browserresource.icon.IconView object at ...>


The content registers its own index view. It displays the image and a download link. To be able to display the content, we need it persisted in a locatable tree, as the links depend on the urls:

>>> from zope.component.hooks import getSite
>>> site = getSite()
>>> site['image'] = image

We can now summon the view and render it. The view is a Page:

>>> from import Page
>>> index = getMultiAdapter((image, request), name="index")
>>> isinstance(index, Page)

>>> index.update()
>>> print index.content()
<h1>My Image</h1>
<div class="content">
  <p class="download">
    <a href=""
    <span>1 KB</span>
  <div class="image">
    <a href=""
       class="image-link" title="My Image">
      <img src="" />


0.4 (2011-02-14)

  • The schema now inherits from IDescriptiveSchema from and no longer from IBaseContent from dolmen.content. This adds a description attribute along with the already existing title.

0.3 (2011-01-13)

  • Resources are now registered and declared thanks to fanstatic.

0.2 (2010-07-27)

  • Packaging corrections.

0.1 (2010-07-21)

  • Initial release

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