def other_story_links(self, instance, story):
edges = set()
nodes = set()
type_str = Edge._type_string_from_model(instance)
outgoing = Edge.objects.filter(verb="primary", subject_id=instance.id, subject_type=type_str).exclude(story=story)
second_out = Edge.objects.filter(verb="secondary", subject_id=instance.id, subject_type=type_str, story=story)
incoming = Edge.objects.filter(verb="primary", object_id=instance.id, object_type=type_str).exclude(story=story)
second_in = Edge.objects.filter(verb="secondary", object_id=instance.id, object_type=type_str, story=story)
outgoing = outgoing or second_out
incoming = incoming or second_in
for edge in outgoing:
node = edge.object
node.horizontal_position = -self.node_separation
node.story = edge.story
nodes.add(node)
edges.add(edge)
for edge in incoming:
# The incoming links kink the wrong way on the map. Reversing the link fixes this. We do it in the view
edge.incoming = True
node = edge.subject
node.horizontal_position = self.node_separation
node.story = edge.story
nodes.add(node)
edges.add(edge)
return nodes,edges
def import_from_json(data, clean=False, verbose=False):
"""
Given an already-parsed JSON object, imports the data within
into the database.
"""
# If we're cleaning, clean.
if clean:
for model in Node.all_child_classes + [Edge]:
model.objects.all().delete()
# First pass: insert the things into the database
relationships = []
object_cache = {}
for thing in data:
# Get the class it maps to
try:
klass = type_map[thing['type']]
except KeyError:
raise ValueError("Invalid thing (bad type): %r" % thing)
# Get the object if it exists
instance = klass.objects.get_or_create(name=thing['name'])[0]
# Delete all edges coming off of the object
instance.outgoing().delete()
# Store relationships for later use
for verb, targets in thing['relationships'].items():
for target in targets:
relationships.append((instance, target, verb))
# Cache object
object_cache[thing['name']] = instance
if verbose:
print "Imported %s" % thing['name']
# Second pass: create relationships
if verbose:
print "Creating relationships..."
for subject, object_name, verb in relationships:
for verb, targets in thing['relationships'].items():
edge = Edge(verb=verb)
edge.subject = instance
try:
edge.object = object_cache[object_name]
except KeyError:
raise ValueError("Relationship from %s to non-existent object %s" % (subject, object_name))
edge.save()
def save_m2m_real(self):
try:
self.instance.incoming("described_by").get(story__isnull=False)
except Edge.DoesNotExist:
edge = Edge(verb="described_by")
edge.subject = self.cleaned_data['subject']
edge.object = self.instance
edge.story = self.cleaned_data['story']
edge.save()
def realise_objects(wanted, needed):
to_get = {}
for item in needed:
to_get.setdefault(item.data['type'][0], []).append(item)
for model, items in to_get.iteritems():
model = Edge._model_from_type_string('core.' + model)
objs = model.objects.in_bulk([int(item.data['id'][0]) for item in items])
for item in items:
item.object = objs[int(item.data['id'][0])]
def get_context_data(self):
context = get_layout_data()
context["story"] = self.request.GET.get('story')
# See if there's currently a node
current_node = self.request.GET.get("current_node")
if current_node:
type_string, pk = current_node.split(":")
model_class = Edge._model_from_type_string(type_string)
instance = model_class.objects.get(pk=pk)
context["current_node"] = instance
node_story_names = [s.name.lower() for s in instance.stories()]
if context["story"] not in node_story_names:
context["story"] = node_story_names[0]
context['under_map'] = True
return context
def other_story_links(self, instance, story):
edges = set()
nodes = set()
type_str = Edge._type_string_from_model(instance)
outgoing = Edge.objects.filter(
verb="primary", subject_id=instance.id,
subject_type=type_str).exclude(story=story)
second_out = Edge.objects.filter(verb="secondary",
subject_id=instance.id,
subject_type=type_str,
story=story)
incoming = Edge.objects.filter(
verb="primary", object_id=instance.id,
object_type=type_str).exclude(story=story)
second_in = Edge.objects.filter(verb="secondary",
object_id=instance.id,
object_type=type_str,
story=story)
outgoing = outgoing or second_out
incoming = incoming or second_in
for edge in outgoing:
node = edge.object
node.horizontal_position = -self.node_separation
node.story = edge.story
nodes.add(node)
edges.add(edge)
for edge in incoming:
# The incoming links kink the wrong way on the map. Reversing the link fixes this. We do it in the view
edge.incoming = True
node = edge.subject
node.horizontal_position = self.node_separation
node.story = edge.story
nodes.add(node)
edges.add(edge)
return nodes, edges
def import_from_json(data, clean=False, verbose=False):
"""
Given an already-parsed JSON object, imports the data within
into the database.
"""
# If we're cleaning, clean.
if clean:
for model in Node.all_child_classes + [Edge]:
model.objects.all().delete()
# First pass: insert the things into the database
relationships = []
object_cache = {}
for thing in data:
# Get the class it maps to
try:
klass = type_map[thing['type']]
except KeyError:
raise ValueError("Invalid thing (bad type): %r" % thing)
# Get the object if it exists
instance = klass.objects.get_or_create(name=thing['name'])[0]
# Delete all edges coming off of the object
instance.outgoing().delete()
# Store relationships for later use
for verb, targets in thing['relationships'].items():
for target in targets:
relationships.append((instance, target, verb))
# Cache object
object_cache[thing['name']] = instance
if verbose:
print "Imported %s" % thing['name']
# Second pass: create relationships
if verbose:
print "Creating relationships..."
for subject, object_name, verb in relationships:
for verb, targets in thing['relationships'].items():
edge = Edge(verb=verb)
edge.subject = instance
try:
edge.object = object_cache[object_name]
except KeyError:
raise ValueError(
"Relationship from %s to non-existent object %s" %
(subject, object_name))
edge.save()
def clean(self, value):
subject_string, pk = value.split(":")
subject_model = Edge._model_from_type_string(subject_string)
return subject_model.objects.get(pk=pk)
def test_model_from_type_string(self):
self.assertEqual(Person, Edge._model_from_type_string("core.person"))
def test_type_string_generation(self):
person = Person.objects.get(pk=1)
self.assertEqual("core.person", Edge._type_string_from_model(person))
concept = Concept.objects.get(pk=1)
self.assertEqual("core.concept", Edge._type_string_from_model(concept))
def test_model_from_type_string(self):
self.assertEqual(Person, Edge._model_from_type_string("core.person"))
def test_type_string_generation(self):
person = Person.objects.get(pk=1)
self.assertEqual("core.person", Edge._type_string_from_model(person))
concept = Concept.objects.get(pk=1)
self.assertEqual("core.concept", Edge._type_string_from_model(concept))
