def load_thesaurus(self, input_file, name, store):
g = Graph()
# if the input_file is an UploadedFile object rather than a file path the Graph.parse()
# method may not have enough info to correctly guess the type; in this case supply the
# name, which should include the extension, to guess_format manually...
rdf_format = None
if isinstance(input_file, UploadedFile):
self.stderr.write(self.style.WARNING(f"Guessing RDF format from {input_file.name}..."))
rdf_format = guess_format(input_file.name)
g.parse(input_file, format=rdf_format)
# An error will be thrown here there is more than one scheme in the file
scheme = g.value(None, RDF.type, SKOS.ConceptScheme, any=False)
if scheme is None:
raise CommandError("ConceptScheme not found in file")
default_lang = getattr(settings, 'THESAURUS_DEFAULT_LANG', None)
available_titles = [t for t in g.objects(scheme, DC.title) if isinstance(t, Literal)]
thesaurus_title = value_for_language(available_titles, default_lang)
description = g.value(scheme, DC.description, None, default=thesaurus_title)
date_issued = g.value(scheme, DCTERMS.issued, None, default="")
self.stderr.write(self.style.SUCCESS(f'Thesaurus "{thesaurus_title}", desc: {description} issued at {date_issued}'))
thesaurus = Thesaurus()
thesaurus.identifier = name
thesaurus.description = description
thesaurus.title = thesaurus_title
thesaurus.about = str(scheme)
thesaurus.date = date_issued
if store:
thesaurus.save()
for lang in available_titles:
if lang.language is not None:
thesaurus_label = ThesaurusLabel()
thesaurus_label.lang = lang.language
thesaurus_label.label = lang.value
thesaurus_label.thesaurus = thesaurus
if store:
thesaurus_label.save()
for concept in g.subjects(RDF.type, SKOS.Concept):
pref = g.preferredLabel(concept, default_lang)[0][1]
about = str(concept)
alt_label = g.value(concept, SKOS.altLabel, object=None, default=None)
if alt_label is not None:
alt_label = str(alt_label)
else:
available_labels = [t for t in g.objects(concept, SKOS.prefLabel) if isinstance(t, Literal)]
alt_label = value_for_language(available_labels, default_lang)
self.stderr.write(self.style.SUCCESS(f'Concept {str(pref)}: {alt_label} ({about})'))
tk = ThesaurusKeyword()
tk.thesaurus = thesaurus
tk.about = about
tk.alt_label = alt_label
if store:
tk.save()
for _, pref_label in g.preferredLabel(concept):
lang = pref_label.language
label = str(pref_label)
self.stderr.write(self.style.SUCCESS(f' Label {lang}: {label}'))
tkl = ThesaurusKeywordLabel()
tkl.keyword = tk
tkl.lang = lang
tkl.label = label
if store:
tkl.save()
def load_thesaurus(self, input_file, name, store):
RDF_URI = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'
XML_URI = 'http://www.w3.org/XML/1998/namespace'
ABOUT_ATTRIB = f"{{{RDF_URI}}}about"
LANG_ATTRIB = f"{{{XML_URI}}}lang"
ns = {
'rdf': RDF_URI,
'foaf': 'http://xmlns.com/foaf/0.1/',
'dc': 'http://purl.org/dc/elements/1.1/',
'dcterms': 'http://purl.org/dc/terms/',
'skos': 'http://www.w3.org/2004/02/skos/core#'
}
tfile = dlxml.parse(input_file)
root = tfile.getroot()
scheme = root.find('skos:ConceptScheme', ns)
if not scheme:
raise CommandError("ConceptScheme not found in file")
titles = scheme.findall('dc:title', ns)
default_lang = getattr(settings, 'THESAURUS_DEFAULT_LANG', None)
available_lang = get_all_lang_available_with_title(titles, LANG_ATTRIB)
thesaurus_title = determinate_value(available_lang, default_lang)
descr = scheme.find('dc:description', ns).text if scheme.find(
'dc:description', ns) else thesaurus_title
date_issued = scheme.find('dcterms:issued', ns).text
about = scheme.attrib.get(ABOUT_ATTRIB)
print(f'Thesaurus "{thesaurus_title}" issued at {date_issued}')
thesaurus = Thesaurus()
thesaurus.identifier = name
thesaurus.title = thesaurus_title
thesaurus.description = descr
thesaurus.about = about
thesaurus.date = date_issued
if store:
thesaurus.save()
for lang in available_lang:
if lang[0] is not None:
thesaurus_label = ThesaurusLabel()
thesaurus_label.lang = lang[0]
thesaurus_label.label = lang[1]
thesaurus_label.thesaurus = thesaurus
thesaurus_label.save()
for concept in root.findall('skos:Concept', ns):
about = concept.attrib.get(ABOUT_ATTRIB)
alt_label = concept.find('skos:altLabel', ns)
if alt_label is not None:
alt_label = alt_label.text
else:
concepts = concept.findall('skos:prefLabel', ns)
available_lang = get_all_lang_available_with_title(
concepts, LANG_ATTRIB)
alt_label = determinate_value(available_lang, default_lang)
print(f'Concept {alt_label} ({about})')
tk = ThesaurusKeyword()
tk.thesaurus = thesaurus
tk.about = about
tk.alt_label = alt_label
if store:
tk.save()
for pref_label in concept.findall('skos:prefLabel', ns):
lang = pref_label.attrib.get(LANG_ATTRIB)
label = pref_label.text
print(f' Label {lang}: {label}')
tkl = ThesaurusKeywordLabel()
tkl.keyword = tk
tkl.lang = lang
tkl.label = label
if store:
tkl.save()