"""The automatic entity form.
:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
__docformat__ = "restructuredtext en"
_ = unicode
from logilab.common.decorators import iclassmethod, cached
from cubicweb import typed_eid
from cubicweb.web import stdmsgs, uicfg
from cubicweb.web import form, formwidgets as fwdgs
from cubicweb.web.formfields import guess_field
from cubicweb.web.views import forms, editforms
class AutomaticEntityForm(forms.EntityFieldsForm):
"""base automatic form to edit any entity.
Designed to be fully generated from schema but highly configurable through:
* rtags (rcategories, rfields, rwidgets, inlined, rpermissions)
* various standard form parameters
XXX s/rtags/uicfg/ ?
You can also easily customise it by adding/removing fields in
AutomaticEntityForm instances.
"""
id = 'edition'
cwtarget = 'eformframe'
cssclass = 'entityForm'
copy_nav_params = True
form_buttons = [fwdgs.SubmitButton(),
fwdgs.Button(stdmsgs.BUTTON_APPLY, cwaction='apply'),
fwdgs.Button(stdmsgs.BUTTON_CANCEL, cwaction='cancel')]
attrcategories = ('primary', 'secondary')
# class attributes below are actually stored in the uicfg module since we
# don't want them to be reloaded
rcategories = uicfg.autoform_section
rfields = uicfg.autoform_field
rfields_kwargs = uicfg.autoform_field_kwargs
rinlined = uicfg.autoform_is_inlined
rpermissions_overrides = uicfg.autoform_permissions_overrides
# class methods mapping schema relations to fields in the form ############
@classmethod
def erelations_by_category(cls, entity, categories=None, permission=None,
rtags=None, strict=False):
"""return a list of (relation schema, target schemas, role) matching
categories and permission
`strict`:
bool telling if having local role is enough (strict = False) or not
"""
if categories is not None:
if not isinstance(categories, (list, tuple, set, frozenset)):
categories = (categories,)
if not isinstance(categories, (set, frozenset)):
categories = frozenset(categories)
eschema = entity.e_schema
if rtags is None:
rtags = cls.rcategories
permsoverrides = cls.rpermissions_overrides
if entity.has_eid():
eid = entity.eid
else:
eid = None
strict = False
for rschema, targetschemas, role in eschema.relation_definitions(True):
# check category first, potentially lower cost than checking
# permission which may imply rql queries
if categories is not None:
targetschemas = [tschema for tschema in targetschemas
if rtags.etype_get(eschema, rschema, role, tschema) in categories]
if not targetschemas:
continue
if permission is not None:
# tag allowing to hijack the permission machinery when
# permission is not verifiable until the entity is actually
# created...
if eid is None and '%s_on_new' % permission in permsoverrides.etype_get(eschema, rschema, role):
yield (rschema, targetschemas, role)
continue
if rschema.is_final():
if not rschema.has_perm(entity.req, permission, eid):
continue
elif role == 'subject':
if not ((not strict and rschema.has_local_role(permission)) or
rschema.has_perm(entity.req, permission, fromeid=eid)):
continue
# on relation with cardinality 1 or ?, we need delete perm as well
# if the relation is already set
if (permission == 'add'
and rschema.cardinality(eschema, targetschemas[0], role) in '1?'
and eid and entity.related(rschema.type, role)
and not rschema.has_perm(entity.req, 'delete', fromeid=eid,
toeid=entity.related(rschema.type, role)[0][0])):
continue
elif role == 'object':
if not ((not strict and rschema.has_local_role(permission)) or
rschema.has_perm(entity.req, permission, toeid=eid)):
continue
# on relation with cardinality 1 or ?, we need delete perm as well
# if the relation is already set
if (permission == 'add'
and rschema.cardinality(targetschemas[0], eschema, role) in '1?'
and eid and entity.related(rschema.type, role)
and not rschema.has_perm(entity.req, 'delete', toeid=eid,
fromeid=entity.related(rschema.type, role)[0][0])):
continue
yield (rschema, targetschemas, role)
@classmethod
def esrelations_by_category(cls, entity, categories=None, permission=None,
strict=False):
"""filter out result of relations_by_category(categories, permission) by
removing final relations
return a sorted list of (relation's label, relation'schema, role)
"""
result = []
for rschema, ttypes, role in cls.erelations_by_category(
entity, categories, permission, strict=strict):
if rschema.is_final():
continue
result.append((rschema.display_name(entity.req, role), rschema, role))
return sorted(result)
@iclassmethod
def field_by_name(cls_or_self, name, role='subject', eschema=None):
"""return field with the given name and role. If field is not explicitly
defined for the form but `eclass` is specified, guess_field will be
called.
"""
try:
return super(AutomaticEntityForm, cls_or_self).field_by_name(name, role)
except form.FieldNotFound:
if eschema is None or not name in cls_or_self.schema:
raise
rschema = cls_or_self.schema.rschema(name)
# XXX use a sample target type. Document this.
tschemas = rschema.targets(eschema, role)
fieldcls = cls_or_self.rfields.etype_get(eschema, rschema, role,
tschemas[0])
kwargs = cls_or_self.rfields_kwargs.etype_get(eschema, rschema,
role, tschemas[0])
if kwargs is None:
kwargs = {}
if fieldcls:
if not isinstance(fieldcls, type):
return fieldcls # already and instance
return fieldcls(name=name, role=role, eidparam=True, **kwargs)
field = guess_field(eschema, rschema, role, eidparam=True, **kwargs)
if field is None:
raise
return field
# base automatic entity form methods #######################################
def __init__(self, *args, **kwargs):
super(AutomaticEntityForm, self).__init__(*args, **kwargs)
entity = self.edited_entity
if entity.has_eid():
entity.complete()
for rschema, role in self.editable_attributes():
try:
self.field_by_name(rschema.type, role)
continue # explicitly specified
except form.FieldNotFound:
# has to be guessed
try:
field = self.field_by_name(rschema.type, role,
eschema=entity.e_schema)
self.fields.append(field)
except form.FieldNotFound:
# meta attribute such as <attr>_format
continue
self.maxrelitems = self.req.property_value('navigation.related-limit')
self.force_display = bool(self.req.form.get('__force_display'))
@property
def related_limit(self):
if self.force_display:
return None
return self.maxrelitems + 1
@property
def form_needs_multipart(self):
"""true if the form needs enctype=multipart/form-data"""
return self._subform_needs_multipart()
def build_context(self, rendervalues=None):
super(AutomaticEntityForm, self).build_context(rendervalues)
for form in self.inlined_forms():
form.build_context(rendervalues)
def _subform_needs_multipart(self, _tested=None):
if _tested is None:
_tested = set()
if super(AutomaticEntityForm, self).form_needs_multipart:
return True
# take a look at inlined forms to check (recursively) if they
# need multipart handling.
# XXX: this is very suboptimal because inlined forms will be
# selected / instantiated twice : here and during form rendering.
# Potential solutions:
# -> use subforms for inlined forms to get easiser access
# -> use a simple onload js function to check if there is
# a input type=file in the form
# -> generate the <form> node when the content is rendered
# and we know the correct enctype (formrenderer's w attribute
# is not a StringIO)
for formview in self.inlined_form_views():
if formview.form:
if hasattr(formview.form, '_subform_needs_multipart'):
needs_multipart = formview.form._subform_needs_multipart(_tested)
else:
needs_multipart = formview.form.form_needs_multipart
if needs_multipart:
return True
return False
def action(self):
"""return the form's action attribute. Default to validateform if not
explicitly overriden.
"""
try:
return self._action
except AttributeError:
return self.build_url('validateform')
def set_action(self, value):
"""override default action"""
self._action = value
action = property(action, set_action)
# methods mapping edited entity relations to fields in the form ############
def relations_by_category(self, categories=None, permission=None):
"""return a list of (relation schema, target schemas, role) matching
given category(ies) and permission
"""
return self.erelations_by_category(self.edited_entity, categories,
permission)
def inlined_relations(self):
"""return a list of (relation schema, target schemas, role) matching
given category(ies) and permission
"""
# we'll need an initialized varmaker if there are some inlined relation
self.initialize_varmaker()
return self.erelations_by_category(self.edited_entity, True, 'add',
self.rinlined)
def srelations_by_category(self, categories=None, permission=None,
strict=False):
"""filter out result of relations_by_category(categories, permission) by
removing final relations
return a sorted list of (relation's label, relation'schema, role)
"""
return self.esrelations_by_category(self.edited_entity, categories,
permission, strict=strict)
def editable_attributes(self):
"""return a list of (relation schema, role) to edit for the entity"""
return [(rschema, role) for rschema, _, role in self.relations_by_category(
self.attrcategories, 'add') if rschema != 'eid']
# generic relations modifier ###############################################
def relations_table(self):
"""yiels 3-tuples (rtype, target, related_list)
where <related_list> itself a list of :
- node_id (will be the entity element's DOM id)
- appropriate javascript's togglePendingDelete() function call
- status 'pendingdelete' or ''
- oneline view of related entity
"""
entity = self.edited_entity
pending_deletes = self.req.get_pending_deletes(entity.eid)
for label, rschema, role in self.srelations_by_category('generic', 'add',
strict=True):
relatedrset = entity.related(rschema, role, limit=self.related_limit)
if rschema.has_perm(self.req, 'delete'):
toggleable_rel_link_func = editforms.toggleable_relation_link
else:
toggleable_rel_link_func = lambda x, y, z: u''
related = []
for row in xrange(relatedrset.rowcount):
nodeid = editforms.relation_id(entity.eid, rschema, role,
relatedrset[row][0])
if nodeid in pending_deletes:
status = u'pendingDelete'
label = '+'
else:
status = u''
label = 'x'
dellink = toggleable_rel_link_func(entity.eid, nodeid, label)
eview = self.view('oneline', relatedrset, row=row)
related.append((nodeid, dellink, status, eview))
yield (rschema, role, related)
def restore_pending_inserts(self, cell=False):
"""used to restore edition page as it was before clicking on
'search for <some entity type>'
"""
eid = self.edited_entity.eid
cell = cell and "div_insert_" or "tr"
pending_inserts = set(self.req.get_pending_inserts(eid))
for pendingid in pending_inserts:
eidfrom, rtype, eidto = pendingid.split(':')
if typed_eid(eidfrom) == eid: # subject
label = display_name(self.req, rtype, 'subject')
reid = eidto
else:
label = display_name(self.req, rtype, 'object')
reid = eidfrom
jscall = "javascript: cancelPendingInsert('%s', '%s', null, %s);" \
% (pendingid, cell, eid)
rset = self.req.eid_rset(reid)
eview = self.view('text', rset, row=0)
# XXX find a clean way to handle baskets
if rset.description[0][0] == 'Basket':
eview = '%s (%s)' % (eview, display_name(self.req, 'Basket'))
yield rtype, pendingid, jscall, label, reid, eview
# inlined forms support ####################################################
@cached
def inlined_form_views(self):
"""compute and return list of inlined form views (hosting the inlined form object)
"""
allformviews = []
entity = self.edited_entity
for rschema, ttypes, role in self.inlined_relations():
# show inline forms only if there's one possible target type
# for rschema
if len(ttypes) != 1:
self.warning('entity related by the %s relation should have '
'inlined form but there is multiple target types, '
'dunno what to do', rschema)
continue
ttype = ttypes[0].type
if self.should_inline_relation_form(rschema, ttype, role):
formviews = list(self.inline_edition_form_view(rschema, ttype, role))
if role == 'subject':
card = rschema.rproperty(entity.e_schema, ttype, 'cardinality')[0]
else:
card = rschema.rproperty(ttype, entity.e_schema, 'cardinality')[1]
# there is no related entity and we need at least one: we need to
# display one explicit inline-creation view
if self.should_display_inline_creation_form(rschema, formviews, card):
formviews += self.inline_creation_form_view(rschema, ttype, role)
# we can create more than one related entity, we thus display a link
# to add new related entities
if self.should_display_add_new_relation_link(rschema, formviews, card):
addnewlink = self.vreg['views'].select(
'inline-addnew-link', self.req,
etype=ttype, rtype=rschema, role=role,
peid=self.edited_entity.eid, pform=self, card=card)
formviews.append(addnewlink)
allformviews += formviews
return allformviews
def inlined_forms(self):
for formview in self.inlined_form_views():
if formview.form: # may be None for the addnew_link artefact form
yield formview.form
def should_inline_relation_form(self, rschema, targettype, role):
"""return true if the given relation with entity has role and a
targettype target should be inlined
"""
return self.rinlined.etype_get(self.edited_entity.id, rschema, role,
targettype)
def should_display_inline_creation_form(self, rschema, existant, card):
"""return true if a creation form should be inlined
by default true if there is no related entity and we need at least one
"""
return not existant and card in '1+' or self.req.form.has_key('force_%s_display' % rschema)
def should_display_add_new_relation_link(self, rschema, existant, card):
"""return true if we should add a link to add a new creation form
(through ajax call)
by default true if there is no related entity or if the relation has
multiple cardinality
"""
return not existant or card in '+*'
def should_hide_add_new_relation_link(self, rschema, card):
"""return true if once an inlined creation form is added, the 'add new'
link should be hidden
by default true if the relation has single cardinality
"""
return card in '1?'
def inline_edition_form_view(self, rschema, ttype, role):
"""yield inline form views for already related entities through the
given relation
"""
entity = self.edited_entity
related = entity.has_eid() and entity.related(rschema, role)
if related:
vvreg = self.vreg['views']
# display inline-edition view for all existing related entities
for i, relentity in enumerate(related.entities()):
if relentity.has_perm('update'):
yield vvreg.select('inline-edition', self.req, rset=related,
row=i, col=0, rtype=rschema, role=role,
peid=entity.eid, pform=self)
def inline_creation_form_view(self, rschema, ttype, role):
"""yield inline form views to a newly related (hence created) entity
through the given relation
"""
yield self.vreg['views'].select('inline-creation', self.req,
etype=ttype, rtype=rschema, role=role,
peid=self.edited_entity.eid, pform=self)
def etype_relation_field(etype, rtype, role='subject'):
eschema = AutomaticEntityForm.schema.eschema(etype)
return AutomaticEntityForm.field_by_name(rtype, role, eschema)
## default form ui configuration ##############################################
# use primary and not generated for eid since it has to be an hidden
uicfg.autoform_section.tag_attribute(('*', 'eid'), 'primary')
uicfg.autoform_section.tag_attribute(('*', 'description'), 'secondary')
uicfg.autoform_section.tag_attribute(('*', 'creation_date'), 'metadata')
uicfg.autoform_section.tag_attribute(('*', 'modification_date'), 'metadata')
uicfg.autoform_section.tag_attribute(('*', 'cwuri'), 'metadata')
uicfg.autoform_section.tag_attribute(('*', 'has_text'), 'generated')
uicfg.autoform_section.tag_subject_of(('*', 'in_state', '*'), 'generated')
uicfg.autoform_section.tag_subject_of(('*', 'owned_by', '*'), 'metadata')
uicfg.autoform_section.tag_subject_of(('*', 'created_by', '*'), 'metadata')
uicfg.autoform_section.tag_subject_of(('*', 'is', '*'), 'generated')
uicfg.autoform_section.tag_object_of(('*', 'is', '*'), 'generated')
uicfg.autoform_section.tag_subject_of(('*', 'is_instance_of', '*'), 'generated')
uicfg.autoform_section.tag_object_of(('*', 'is_instance_of', '*'), 'generated')
uicfg.autoform_section.tag_subject_of(('*', 'identity', '*'), 'generated')
uicfg.autoform_section.tag_object_of(('*', 'identity', '*'), 'generated')
uicfg.autoform_section.tag_subject_of(('*', 'require_permission', '*'), 'generated')
uicfg.autoform_section.tag_subject_of(('*', 'by_transition', '*'), 'primary')
uicfg.autoform_section.tag_object_of(('*', 'by_transition', '*'), 'generated')
uicfg.autoform_section.tag_object_of(('*', 'from_state', '*'), 'generated')
uicfg.autoform_section.tag_object_of(('*', 'to_state', '*'), 'generated')
uicfg.autoform_section.tag_subject_of(('*', 'wf_info_for', '*'), 'primary')
uicfg.autoform_section.tag_object_of(('*', 'wf_info_for', '*'), 'generated')
uicfg.autoform_section.tag_subject_of(('*', 'for_user', '*'), 'generated')
uicfg.autoform_section.tag_object_of(('*', 'for_user', '*'), 'generated')
uicfg.autoform_section.tag_subject_of(('CWPermission', 'require_group', '*'), 'primary')
uicfg.autoform_section.tag_attribute(('CWEType', 'final'), 'generated')
uicfg.autoform_section.tag_attribute(('CWRType', 'final'), 'generated')
uicfg.autoform_section.tag_attribute(('CWUser', 'firstname'), 'secondary')
uicfg.autoform_section.tag_attribute(('CWUser', 'surname'), 'secondary')
uicfg.autoform_section.tag_attribute(('CWUser', 'last_login_time'), 'metadata')
uicfg.autoform_section.tag_subject_of(('CWUser', 'in_group', '*'), 'primary')
uicfg.autoform_section.tag_object_of(('*', 'owned_by', 'CWUser'), 'generated')
uicfg.autoform_section.tag_object_of(('*', 'created_by', 'CWUser'), 'generated')
uicfg.autoform_section.tag_object_of(('*', 'bookmarked_by', 'CWUser'), 'metadata')
uicfg.autoform_section.tag_attribute(('Bookmark', 'path'), 'primary')
uicfg.autoform_section.tag_subject_of(('*', 'primary_email', '*'), 'generic')
uicfg.autoform_field_kwargs.tag_attribute(('RQLExpression', 'expression'),
{'widget': fwdgs.TextInput})
uicfg.autoform_field_kwargs.tag_attribute(('Bookmark', 'path'),
{'widget': fwdgs.TextInput})
uicfg.autoform_field_kwargs.tag_subject_of(('TrInfo', 'wf_info_for', '*'),
{'widget': fwdgs.HiddenInput})
uicfg.autoform_is_inlined.tag_subject_of(('*', 'use_email', '*'), True)
uicfg.autoform_is_inlined.tag_subject_of(('CWRelation', 'relation_type', '*'), True)
uicfg.autoform_is_inlined.tag_subject_of(('CWRelation', 'from_entity', '*'), True)
uicfg.autoform_is_inlined.tag_subject_of(('CWRelation', 'to_entity', '*'), True)