def add_annotation(self, metadata, key, value):
""" Adds an Annotation to a Metadata Object
of one namespace
if the key is already included the value
will be updated. if the key is not there, a new annotation
will be created
"""
try:
Annotation.get(imgmeta=metadata, an_key=key)
newimgmetaversion = metadata.version
newimgmetaversion = newimgmetaversion + 1
meta_query = metadata.update(version=newimgmetaversion)
meta_query.execute()
anno_query = Annotation.update(an_value=value).where(imgmeta=metadata, an_key=key)
anno_query.execute()
return
except Annotation.DoesNotExist:
imganno = Annotation.create(
imgmeta = metadata,
an_key = key,
an_value = value,)
imganno.save()
return imganno
def image_detail(imageid):
"""
function that is when a specific image is requested
the metadata of the requested image is loaded (if there is one)
and given to the template
"""
try:
image = Image.get(id=imageid)
imgfrag = ImageFragment.get(image=image, x=0, y=0, visible=True)
imgmeta = Metadata.get(imgfrag=imgfrag, namespace="http://www.w3.org/ns/ma-ont#")
annos = Annotation.get(imgmeta=imgmeta)
return render_template('image_detail.html', img=image,imgmeta=imgmeta)
except Imageuri.DoesNotExist:
flash('Die Bildnummer wurde nicht gefunden. Bitte waehle ein anderes Bild.', 'error')
return render_template('images.html')
except ImageFragment.DoesNotExist:
return render_template('image_detail.html', img=image)
