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First try at implementing required / optional metadata

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This commit is contained in:
Roberto Rosario
2011-02-08 02:18:02 -04:00
parent 9a985028eb
commit e146e2f0e2
2 changed files with 33 additions and 73 deletions
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85
apps/documents/models.py
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@@ -43,27 +43,6 @@ def populate_file_extension_and_mimetype(instance, filename):
#remove prefix '.'
instance.file_extension = extension[1:]
'''
def custom_eval(format, dictionary):
try:
#Do a normal substitution
return format % dictionary
except:
#Use exception to catch unknown elements
(exc_type, exc_info, tb) = sys.exc_info()
key = unicode(exc_info)[2:-1]
try:
#Resolve unknown element
dictionary[key] = eval(key, dictionary)
#Call itself again, but with an additional resolved element in
#the dictionary
return custom_eval(format, dictionary)
except Exception, e:
#Can't resolve elemtent, give up
(exc_type, exc_info, tb) = sys.exc_info()
print exc_info
raise Exception(e)
'''
class DocumentType(models.Model):
name = models.CharField(max_length=32, verbose_name=_(u'name'))
@@ -93,7 +72,6 @@ class Document(models.Model):
ordering = ['-date_updated', '-date_added']
def __unicode__(self):
#return self.uuid
return '%s.%s' % (self.file_filename, self.file_extension)
@models.permalink
@@ -125,36 +103,23 @@ class Document(models.Model):
for metadata_index in self.document_type.metadataindex_set.all():
if metadata_index.enabled:
fabricated_directory = eval(metadata_index.expression, metadata_dict)
target_directory = os.path.join(FILESYSTEM_FILESERVING_PATH, fabricated_directory)
try:
os.makedirs(target_directory)
except OSError, exc:
if exc.errno == errno.EEXIST:
pass
else:
raise OSError(ugettext(u'Unable to create metadata indexing directory: %s') % exc)
next_available_filename(self, metadata_index, target_directory, slugify(self.file_filename), slugify(self.file_extension))
#try:
# os.symlink(os.path.abspath(self.file.path), filepath)
#except OSError, exc:
# raise OSError(ugettext(u'Unable to create symbolic link: %s') % exc)
'''
try:
filepath = create_symlink(os.path.abspath(self.file.path), target_directory, slugify(self.file_filename), slugify(self.file_extension))
document_metadata_index = DocumentMetadataIndex(
document=self, metadata_index=metadata_index,
filename=filepath)
document_metadata_index.save()
except Exception, e:
raise Exception(ugettext(u'Unable to create metadata indexing symbolic link: %s') % e)
'''
fabricated_directory = eval(metadata_index.expression, metadata_dict)
target_directory = os.path.join(FILESYSTEM_FILESERVING_PATH, fabricated_directory)
try:
os.makedirs(target_directory)
except OSError, exc:
if exc.errno == errno.EEXIST:
pass
else:
raise OSError(ugettext(u'Unable to create metadata indexing directory: %s') % exc)
next_available_filename(self, metadata_index, target_directory, slugify(self.file_filename), slugify(self.file_extension))
except NameError:
#Error in eval
#TODO: find way to notify user
pass
def delete_fs_links(self):
if FILESYSTEM_FILESERVING_ENABLE:
@@ -232,23 +197,6 @@ def next_available_filename(document, metadata_index, path, filename, extension,
raise Exception(ugettext(u'Maximum rename count reached, not creating symbolic link'))
return next_available_filename(document, metadata_index, path, filename, extension, suffix+1)
'''
def create_symlink(source, path, filename, extension, suffix=0):
try:
target = filename
if suffix:
target = '_'.join([filename, unicode(suffix)])
filepath = os.path.join(path, os.extsep.join([target, extension]))
os.symlink(source, filepath)
return filepath
except OSError, exc:
if exc.errno == errno.EEXIST:
if suffix > FILESYSTEM_MAX_RENAME_COUNT:
raise Exception(ugettext(u'Maximum rename count reached, not creating symbolic link'))
return create_symlink(source, path, filename, extension, suffix+1)
else:
raise OSError(ugettext(u'Unable to create symbolic link: %s') % exc)
'''
available_functions_string = (_(u' Available functions: %s') % ','.join(['%s()' % name for name, function in AVAILABLE_FUNCTIONS.items()])) if AVAILABLE_FUNCTIONS else ''
available_models_string = (_(u' Available models: %s') % ','.join([name for name, model in AVAILABLE_MODELS.items()])) if AVAILABLE_MODELS else ''
@@ -276,9 +224,8 @@ class MetadataType(models.Model):
class DocumentTypeMetadataType(models.Model):
document_type = models.ForeignKey(DocumentType, verbose_name=_(u'document type'))
metadata_type = models.ForeignKey(MetadataType, verbose_name=_(u'metadata type'))
#create_directory_link = models.BooleanField(verbose_name=_(u'create directory link'))
required = models.BooleanField(default=True, verbose_name=_(u'required'))
#TODO: override default for this document type
#TODO: required? -bool
def __unicode__(self):
return unicode(self.metadata_type)