X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/ee3caf3725902f963a7857684c5f686d6228b68e..d2015bc39e4517540efae2f4f5cc1c77683a6f77:/models.py diff --git a/models.py b/models.py index bacaefd..878d3d4 100644 --- a/models.py +++ b/models.py @@ -10,7 +10,7 @@ from django.template import add_to_builtins as register_templatetags from django.template import Template as DjangoTemplate from django.template import TemplateDoesNotExist from django.template import Context, RequestContext -from django.core.exceptions import ObjectDoesNotExist +from django.core.exceptions import ObjectDoesNotExist, ValidationError try: import json except ImportError: @@ -21,28 +21,15 @@ from django.template.loader_tags import ExtendsNode, ConstantIncludeNode, Includ from django.template.loader import get_template from django.http import Http404, HttpResponse, HttpResponseServerError, HttpResponseRedirect from django.core.servers.basehttp import FileWrapper - - -_value_models = {} -_value_models_ct_pks = [] +from django.conf import settings def register_value_model(model): - if issubclass(model, models.Model): - if model not in _value_models: - _value_models[model] = ContentType.objects.get_for_model(model) - _value_models_ct_pks.append(_value_models[model].pk) - else: - raise TypeError('philo.models.register_value_model only accepts subclasses of django.db.models.Model') + pass def unregister_value_model(model): - if issubclass(model, models.Model): - if model in _value_models: - _value_models_ct_pks.remove(_value_models[model].pk) - del _value_models[model] - else: - raise TypeError('philo.models.unregister_value_model only accepts subclasses of django.db.models.Model') + pass class Attribute(models.Model): @@ -72,7 +59,7 @@ class Relationship(models.Model): entity_object_id = models.PositiveIntegerField(verbose_name='Entity ID') entity = generic.GenericForeignKey('entity_content_type', 'entity_object_id') key = models.CharField(max_length=255) - value_content_type = models.ForeignKey(ContentType, related_name='relationship_value_set', limit_choices_to={'pk__in': _value_models_ct_pks}, verbose_name='Value type') + value_content_type = models.ForeignKey(ContentType, related_name='relationship_value_set', verbose_name='Value type') value_object_id = models.PositiveIntegerField(verbose_name='Value ID') value = generic.GenericForeignKey('value_content_type', 'value_object_id') @@ -123,17 +110,14 @@ class CollectionMemberManager(models.Manager): use_for_related_fields = True def with_model(self, model): - if model in _value_models: - return model._default_manager.filter(pk__in=self.filter(member_content_type=_value_models[model]).values_list('member_object_id', flat=True)) - else: - raise TypeError('CollectionMemberManager.with_model only accepts models previously registered with philo.models.register_value_model') + return model._default_manager.filter(pk__in=self.filter(member_content_type=ContentType.objects.get_for_model(model)).values_list('member_object_id', flat=True)) class CollectionMember(models.Model): objects = CollectionMemberManager() collection = models.ForeignKey(Collection, related_name='members') index = models.PositiveIntegerField(verbose_name='Index', help_text='This will determine the ordering of the item within the collection. (Optional)', null=True, blank=True) - member_content_type = models.ForeignKey(ContentType, limit_choices_to={'pk__in': _value_models_ct_pks}, verbose_name='Member type') + member_content_type = models.ForeignKey(ContentType, verbose_name='Member type') member_object_id = models.PositiveIntegerField(verbose_name='Member ID') member = generic.GenericForeignKey('member_content_type', 'member_object_id') @@ -173,17 +157,17 @@ class TreeManager(models.Manager): return (obj, remainder) raise self.model.DoesNotExist('%s matching query does not exist.' % self.model._meta.object_name) - class TreeModel(models.Model): objects = TreeManager() parent = models.ForeignKey('self', related_name='children', null=True, blank=True) slug = models.SlugField() def get_path(self, pathsep='/', field='slug'): - path = getattr(self, field) + path = getattr(self, field, '?') parent = self.parent while parent: - path = getattr(parent, field) + pathsep + path + self.validate_parent(parent) + path = getattr(parent, field, '?') + pathsep + path parent = parent.parent return path path = property(get_path) @@ -193,6 +177,30 @@ class TreeModel(models.Model): class Meta: abstract = True + + def validate_parents(self, parent=None): + if parent == None: + parent = self.parent + + while parent: + try: + self.validate_parent(parent) + parent = parent.parent + except ObjectDoesNotExist: + return # because it likely means the child doesn't exist + + def validate_parent(self, parent): + #Why doesn't this stop the Admin site from saving a model with itself as parent? + if self == parent: + raise ValidationError("A %s can't be its own parent." % self.__class__.__name__) + + def clean(self): + super(TreeModel, self).clean() + self.validate_parents() + + def save(self, *args, **kwargs): + self.clean() + super(TreeModel, self).save(*args, **kwargs) class TreeEntity(TreeModel, Entity): @@ -212,22 +220,55 @@ class TreeEntity(TreeModel, Entity): abstract = True -class Node(TreeEntity): +class InheritableTreeEntity(TreeEntity): instance_type = models.ForeignKey(ContentType, editable=False) def save(self, force_insert=False, force_update=False): if not hasattr(self, 'instance_type_ptr'): self.instance_type = ContentType.objects.get_for_model(self.__class__) - super(Node, self).save(force_insert, force_update) + super(InheritableTreeEntity, self).save(force_insert, force_update) @property def instance(self): return self.instance_type.get_object_for_this_type(id=self.id) + + def validate_parent(self, parent): + if self.instance == parent.instance: + raise ValidationError("A %s can't be its own parent." % self.__class__.__name__) + + def get_path(self, pathsep='/', field='slug'): + path = getattr(self.instance, field, '?') + parent = self.parent + while parent: + path = getattr(parent.instance, field, '?') + pathsep + path + parent = parent.parent + return path + path = property(get_path) + @property + def attributes(self): + if self.parent: + return QuerySetMapper(self.instance.attribute_set, passthrough=self.parent.instance.attributes) + return QuerySetMapper(self.instance.attribute_set) + + @property + def relationships(self): + if self.parent: + return QuerySetMapper(self.instance.relationship_set, passthrough=self.parent.instance.relationships) + return QuerySetMapper(self.instance.relationship_set) + + class Meta: + abstract = True + + +class Node(InheritableTreeEntity): accepts_subpath = False def render_to_response(self, request, path=None, subpath=None): return HttpResponseServerError() + + class Meta: + unique_together=(('parent', 'slug',),) class MultiNode(Node): @@ -252,7 +293,7 @@ class Redirect(Node): (302, 'Temporary'), (301, 'Permanent'), ) - target = models.URLField() + target = models.URLField(help_text='Must be a valid, absolute URL (i.e. http://)') status_code = models.IntegerField(choices=STATUS_CODES, default=302, verbose_name='redirect type') def render_to_response(self, request, path=None, subpath=None): @@ -276,8 +317,8 @@ class File(Node): class Template(TreeModel): name = models.CharField(max_length=255) documentation = models.TextField(null=True, blank=True) - mimetype = models.CharField(max_length=255, null=True, blank=True) - code = models.TextField() + mimetype = models.CharField(max_length=255, null=True, blank=True, help_text='Default: %s' % settings.DEFAULT_CONTENT_TYPE) + code = models.TextField(verbose_name='django template code') @property def origin(self): @@ -290,37 +331,46 @@ class Template(TreeModel): @property def containers(self): """ - Returns a list of names of contentlets referenced by containers. + Returns a tuple where the first item is a list of names of contentlets referenced by containers, + and the second item is a list of tuples of names and contenttypes of contentreferences referenced by containers. This will break if there is a recursive extends or includes in the template code. Due to the use of an empty Context, any extends or include tags with dynamic arguments probably won't work. """ - def container_node_names(template): - def nodelist_container_node_names(nodelist): - names = [] + def container_nodes(template): + def nodelist_container_nodes(nodelist): + nodes = [] for node in nodelist: try: - for nodelist_name in ('nodelist', 'nodelist_loop', 'nodelist_empty', 'nodelist_true', 'nodelist_false'): + for nodelist_name in ('nodelist', 'nodelist_loop', 'nodelist_empty', 'nodelist_true', 'nodelist_false', 'nodelist_main'): if hasattr(node, nodelist_name): - names.extend(nodelist_container_node_names(getattr(node, nodelist_name))) + nodes.extend(nodelist_container_nodes(getattr(node, nodelist_name))) if isinstance(node, ContainerNode): - names.append(node.name) + nodes.append(node) elif isinstance(node, ExtendsNode): extended_template = node.get_parent(Context()) if extended_template: - names.extend(container_node_names(extended_template)) + nodes.extend(container_nodes(extended_template)) elif isinstance(node, ConstantIncludeNode): included_template = node.template if included_template: - names.extend(container_node_names(included_template)) + nodes.extend(container_nodes(included_template)) elif isinstance(node, IncludeNode): included_template = get_template(node.template_name.resolve(Context())) if included_template: - names.extend(container_node_names(included_template)) + nodes.extend(container_nodes(included_template)) except: pass # fail for this node - return names - return nodelist_container_node_names(template.nodelist) - return set(container_node_names(self.django_template)) + return nodes + return nodelist_container_nodes(template.nodelist) + all_nodes = container_nodes(self.django_template) + contentlet_node_names = set([node.name for node in all_nodes if not node.references]) + contentreference_node_names = [] + contentreference_node_specs = [] + for node in all_nodes: + if node.references and node.name not in contentreference_node_names: + contentreference_node_specs.append((node.name, node.references)) + contentreference_node_names.append(node.name) + return contentlet_node_names, contentreference_node_specs def __unicode__(self): return self.get_path(u' › ', 'name') @@ -336,6 +386,9 @@ class Template(TreeModel): class Page(Node): + """ + Represents an HTML page. The page will have a number of related Contentlets depending on the template selected - but these will appear only after the page has been saved with that template. + """ template = models.ForeignKey(Template, related_name='pages') title = models.CharField(max_length=255) @@ -357,6 +410,14 @@ class Contentlet(models.Model): dynamic = models.BooleanField(default=False) +class ContentReference(models.Model): + page = models.ForeignKey(Page, related_name='contentreferences') + name = models.CharField(max_length=255) + content_type = models.ForeignKey(ContentType, verbose_name='Content type') + content_id = models.PositiveIntegerField(verbose_name='Content ID') + content = generic.GenericForeignKey('content_type', 'content_id') + + register_templatetags('philo.templatetags.containers')