"""abstract form classes for CubicWeb web client
:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
"""
__docformat__ = "restructuredtext en"
from warnings import warn
from logilab.common.compat import any
from logilab.common.decorators import iclassmethod
from cubicweb.appobject import AppRsetObject
from cubicweb.selectors import yes, non_final_entity, match_kwargs, one_line_rset
from cubicweb.view import NOINDEX, NOFOLLOW
from cubicweb.common import tags
from cubicweb.web import INTERNAL_FIELD_VALUE, eid_param, stdmsgs
from cubicweb.web.httpcache import NoHTTPCacheManager
from cubicweb.web.controller import NAV_FORM_PARAMETERS
from cubicweb.web.formfields import (Field, StringField, RelationField,
HiddenInitialValueField)
from cubicweb.web.formrenderers import FormRenderer
from cubicweb.web import formwidgets as fwdgs
# XXX should disappear
class FormMixIn(object):
"""abstract form mix-in
XXX: you should inherit from this FIRST (obscure pb with super call)"""
category = 'form'
controller = 'edit'
domid = 'entityForm'
http_cache_manager = NoHTTPCacheManager
add_to_breadcrumbs = False
skip_relations = set()
def __init__(self, req, rset, **kwargs):
super(FormMixIn, self).__init__(req, rset, **kwargs)
self.maxrelitems = self.req.property_value('navigation.related-limit')
self.maxcomboitems = self.req.property_value('navigation.combobox-limit')
self.force_display = not not req.form.get('__force_display')
# get validation session data which may have been previously set.
# deleting validation errors here breaks form reloading (errors are
# no more available), they have to be deleted by application's publish
# method on successful commit
formurl = req.url()
forminfo = req.get_session_data(formurl)
if forminfo:
req.data['formvalues'] = forminfo['values']
req.data['formerrors'] = errex = forminfo['errors']
req.data['displayederrors'] = set()
# if some validation error occured on entity creation, we have to
# get the original variable name from its attributed eid
foreid = errex.entity
for var, eid in forminfo['eidmap'].items():
if foreid == eid:
errex.eid = var
break
else:
errex.eid = foreid
def html_headers(self):
"""return a list of html headers (eg something to be inserted between
<head> and </head> of the returned page
by default forms are neither indexed nor followed
"""
return [NOINDEX, NOFOLLOW]
def linkable(self):
"""override since forms are usually linked by an action,
so we don't want them to be listed by appli.possible_views
"""
return False
@property
def limit(self):
if self.force_display:
return None
return self.maxrelitems + 1
def need_multipart(self, entity, categories=('primary', 'secondary')):
"""return a boolean indicating if form's enctype should be multipart
"""
for rschema, _, x in entity.relations_by_category(categories):
if entity.get_widget(rschema, x).need_multipart:
return True
# let's find if any of our inlined entities needs multipart
for rschema, targettypes, x in entity.relations_by_category('inlineview'):
assert len(targettypes) == 1, \
"I'm not able to deal with several targets and inlineview"
ttype = targettypes[0]
inlined_entity = self.vreg.etype_class(ttype)(self.req, None, None)
for irschema, _, x in inlined_entity.relations_by_category(categories):
if inlined_entity.get_widget(irschema, x).need_multipart:
return True
return False
def button(self, label, klass='validateButton', tabindex=None, **kwargs):
if tabindex is None:
tabindex = self.req.next_tabindex()
return tags.input(value=label, klass=klass, **kwargs)
def action_button(self, label, onclick=None, __action=None, **kwargs):
if onclick is None:
onclick = "postForm('__action_%s', \'%s\', \'%s\')" % (
__action, label, self.domid)
return self.button(label, onclick=onclick, **kwargs)
def button_ok(self, label=None, type='submit', name='defaultsubmit',
**kwargs):
label = self.req._(label or stdmsgs.BUTTON_OK).capitalize()
return self.button(label, name=name, type=type, **kwargs)
def button_apply(self, label=None, type='button', **kwargs):
label = self.req._(label or stdmsgs.BUTTON_APPLY).capitalize()
return self.action_button(label, __action='apply', type=type, **kwargs)
def button_delete(self, label=None, type='button', **kwargs):
label = self.req._(label or stdmsgs.BUTTON_DELETE).capitalize()
return self.action_button(label, __action='delete', type=type, **kwargs)
def button_cancel(self, label=None, type='button', **kwargs):
label = self.req._(label or stdmsgs.BUTTON_CANCEL).capitalize()
return self.action_button(label, __action='cancel', type=type, **kwargs)
def button_reset(self, label=None, type='reset', name='__action_cancel',
**kwargs):
label = self.req._(label or stdmsgs.BUTTON_CANCEL).capitalize()
return self.button(label, type=type, **kwargs)
# XXX deprecated with new form system
def error_message(self):
"""return formatted error message
This method should be called once inlined field errors has been consumed
"""
errex = self.req.data.get('formerrors')
# get extra errors
if errex is not None:
errormsg = self.req._('please correct the following errors:')
displayed = self.req.data['displayederrors']
errors = sorted((field, err) for field, err in errex.errors.items()
if not field in displayed)
if errors:
if len(errors) > 1:
templstr = '<li>%s</li>\n'
else:
templstr = ' %s\n'
for field, err in errors:
if field is None:
errormsg += templstr % err
else:
errormsg += templstr % '%s: %s' % (self.req._(field), err)
if len(errors) > 1:
errormsg = '<ul>%s</ul>' % errormsg
return u'<div class="errorMessage">%s</div>' % errormsg
return u''
###############################################################################
class metafieldsform(type):
def __new__(mcs, name, bases, classdict):
allfields = []
for base in bases:
if hasattr(base, '_fields_'):
allfields += base._fields_
clsfields = (item for item in classdict.items()
if isinstance(item[1], Field))
for fieldname, field in sorted(clsfields, key=lambda x: x[1].creation_rank):
if not field.name:
field.set_name(fieldname)
allfields.append(field)
classdict['_fields_'] = allfields
return super(metafieldsform, mcs).__new__(mcs, name, bases, classdict)
class FieldNotFound(Exception):
"""raised by field_by_name when a field with the given name has not been
found
"""
class FieldsForm(FormMixIn, AppRsetObject):
__metaclass__ = metafieldsform
__registry__ = 'forms'
__select__ = yes()
is_subform = False
# attributes overrideable through __init__
internal_fields = ('__errorurl',) + NAV_FORM_PARAMETERS
needs_js = ('cubicweb.edition.js',)
needs_css = ('cubicweb.form.css',)
domid = 'form'
title = None
action = None
onsubmit = "return freezeFormButtons('%(domid)s');"
cssclass = None
cssstyle = None
cwtarget = None
buttons = None
redirect_path = None
set_error_url = True
copy_nav_params = False
def __init__(self, req, rset=None, row=None, col=None, submitmsg=None,
**kwargs):
super(FieldsForm, self).__init__(req, rset, row=row, col=col)
self.buttons = kwargs.pop('buttons', [])
for key, val in kwargs.items():
assert hasattr(self.__class__, key) and not key[0] == '_', key
setattr(self, key, val)
self.fields = list(self.__class__._fields_)
if self.set_error_url:
self.form_add_hidden('__errorurl', req.url())
if self.copy_nav_params:
for param in NAV_FORM_PARAMETERS:
value = kwargs.get(param, req.form.get(param))
if value:
self.form_add_hidden(param, initial=value)
if submitmsg is not None:
self.form_add_hidden('__message', submitmsg)
self.context = None
@iclassmethod
def field_by_name(cls_or_self, name, role='subject'):
"""return field with the given name and role"""
if isinstance(cls_or_self, type):
fields = cls_or_self._fields_
else:
fields = cls_or_self.fields
for field in fields:
if field.name == name and field.role == role:
return field
raise FieldNotFound(name)
@iclassmethod
def remove_field(cls_or_self, field):
if isinstance(cls_or_self, type):
fields = cls_or_self._fields_
else:
fields = cls_or_self.fields
fields.remove(field)
@iclassmethod
def append_field(cls_or_self, field):
if isinstance(cls_or_self, type):
fields = cls_or_self._fields_
else:
fields = cls_or_self.fields
fields.append(field)
@property
def form_needs_multipart(self):
return any(field.needs_multipart for field in self.fields)
def form_add_hidden(self, name, value=None, **kwargs):
field = StringField(name=name, widget=fwdgs.HiddenInput, initial=value,
**kwargs)
self.fields.append(field)
return field
def add_media(self):
"""adds media (CSS & JS) required by this widget"""
if self.needs_js:
self.req.add_js(self.needs_js)
if self.needs_css:
self.req.add_css(self.needs_css)
def form_render(self, **values):
renderer = values.pop('renderer', FormRenderer())
return renderer.render(self, values)
def form_build_context(self, values):
self.context = context = {}
# on validation error, we get a dictionnary of previously submitted values
previous_values = self.req.data.get('formvalues')
if previous_values:
values.update(previous_values)
for field in self.fields:
for field in field.actual_fields(self):
value = self.form_field_value(field, values)
context[field] = {'value': field.format_value(self.req, value),
'rawvalue': value,
'name': self.form_field_name(field),
'id': self.form_field_id(field),
}
def form_field_value(self, field, values, load_bytes=False):
"""looks for field's value in
1. kw args given to render_form (including previously submitted form
values if any)
2. req.form
3. field's initial value
"""
if field.name in values:
value = values[field.name]
elif field.name in self.req.form:
value = self.req.form[field.name]
else:
value = field.initial
return value
def form_field_error(self, field):
"""return validation error for widget's field, if any"""
errex = self.req.data.get('formerrors')
if errex and field.name in errex.errors:
self.req.data['displayederrors'].add(field.name)
return u'<span class="error">%s</span>' % errex.errors[field.name]
return u''
def form_field_format(self, field):
return self.req.property_value('ui.default-text-format')
def form_field_encoding(self, field):
return self.req.encoding
def form_field_name(self, field):
return field.name
def form_field_id(self, field):
return field.id
def form_field_vocabulary(self, field, limit=None):
raise NotImplementedError
def form_buttons(self):
return self.buttons
class EntityFieldsForm(FieldsForm):
__select__ = (match_kwargs('entity') | (one_line_rset & non_final_entity()))
internal_fields = FieldsForm.internal_fields + ('__type', 'eid')
domid = 'entityForm'
def __init__(self, *args, **kwargs):
self.edited_entity = kwargs.pop('entity', None)
msg = kwargs.pop('submitmsg', None)
super(EntityFieldsForm, self).__init__(*args, **kwargs)
if self.edited_entity is None:
self.edited_entity = self.complete_entity(self.row)
self.form_add_hidden('__type', eidparam=True)
self.form_add_hidden('eid')
if msg is not None:
# If we need to directly attach the new object to another one
for linkto in self.req.list_form_param('__linkto'):
self.form_add_hidden('__linkto', linkto)
msg = '%s %s' % (msg, self.req._('and linked'))
self.form_add_hidden('__message', msg)
def form_render(self, **values):
self.form_add_entity_hiddens(self.edited_entity.e_schema)
return super(EntityFieldsForm, self).form_render(**values)
def form_add_entity_hiddens(self, eschema):
for field in self.fields[:]:
for field in field.actual_fields(self):
fieldname = field.name
if fieldname != 'eid' and (
(eschema.has_subject_relation(fieldname) or
eschema.has_object_relation(fieldname))):
field.eidparam = True
self.fields.append(self.form_entity_hidden_field(field))
def form_entity_hidden_field(self, field):
"""returns the hidden field which will indicate the value
before the modification
"""
# Only RelationField has a `role` attribute, others are used
# to describe attribute fields => role is 'subject'
if getattr(field, 'role', 'subject') == 'subject':
name = 'edits-%s' % field.name
else:
name = 'edito-%s' % field.name
return HiddenInitialValueField(field, name=name)
def form_field_value(self, field, values, load_bytes=False):
"""look for field's value with the following rules:
1. handle special __type and eid fields
2. looks in kw args given to render_form (including previously submitted
form values if any)
3. looks in req.form
4. if entity has an eid:
1. looks for an associated attribute / method
2. use field's initial value
else:
1. looks for a default_<fieldname> attribute / method on the form
2. use field's initial value
values found in step 4 may be a callable which'll then be called.
"""
fieldname = field.name
if fieldname.startswith('edits-') or fieldname.startswith('edito-'):
# edit[s|o]- fieds must have the actual value stored on the entity
if hasattr(field, 'visible_field'):
if self.edited_entity.has_eid():
value = self._form_field_entity_value(field.visible_field,
default_initial=False)
else:
value = INTERNAL_FIELD_VALUE
else:
value = field.initial
elif fieldname == '__type':
value = self.edited_entity.id
elif fieldname == 'eid':
value = self.edited_entity.eid
elif fieldname in values:
value = values[fieldname]
elif fieldname in self.req.form:
value = self.req.form[fieldname]
else:
if self.edited_entity.has_eid() and field.eidparam:
# use value found on the entity or field's initial value if it's
# not an attribute of the entity (XXX may conflicts and get
# undesired value)
value = self._form_field_entity_value(field, default_initial=True,
load_bytes=load_bytes)
else:
defaultattr = 'default_%s' % fieldname
if hasattr(self.edited_entity, defaultattr):
# XXX bw compat, default_<field name> on the entity
warn('found %s on %s, should be set on a specific form'
% (defaultattr, self.edited_entity.id), DeprecationWarning)
value = getattr(self.edited_entity, defaultattr)
elif hasattr(self, defaultattr):
# search for default_<field name> on the form instance
value = getattr(self, defaultattr)
else:
# use field's initial value
value = field.initial
if callable(value):
value = value()
return value
def form_field_format(self, field):
entity = self.edited_entity
if field.eidparam and entity.e_schema.has_metadata(field.name, 'format') and (
entity.has_eid() or '%s_format' % field.name in entity):
return self.edited_entity.attribute_metadata(field.name, 'format')
return self.req.property_value('ui.default-text-format')
def form_field_encoding(self, field):
entity = self.edited_entity
if field.eidparam and entity.e_schema.has_metadata(field.name, 'encoding') and (
entity.has_eid() or '%s_encoding' % field.name in entity):
return self.edited_entity.attribute_metadata(field.name, 'encoding')
return super(EntityFieldsForm, self).form_field_encoding(field)
def form_field_error(self, field):
"""return validation error for widget's field, if any"""
errex = self.req.data.get('formerrors')
if errex and errex.eid == self.edited_entity.eid and field.name in errex.errors:
self.req.data['displayederrors'].add(field.name)
return u'<span class="error">%s</span>' % errex.errors[field.name]
return u''
def _form_field_entity_value(self, field, default_initial=True, load_bytes=False):
attr = field.name
entity = self.edited_entity
if field.role == 'object':
attr = 'reverse_' + attr
elif entity.e_schema.subject_relation(attr).is_final():
attrtype = entity.e_schema.destination(attr)
if attrtype == 'Password':
return entity.has_eid() and INTERNAL_FIELD_VALUE or ''
if attrtype == 'Bytes':
if entity.has_eid():
if load_bytes:
return getattr(entity, attr)
# XXX value should reflect if some file is already attached
return True
return False
if default_initial:
value = getattr(entity, attr, field.initial)
else:
value = getattr(entity, attr)
if isinstance(field, RelationField):
# in this case, value is the list of related entities
value = [ent.eid for ent in value]
return value
def form_field_name(self, field):
if field.eidparam:
return eid_param(field.name, self.edited_entity.eid)
return field.name
def form_field_id(self, field):
if field.eidparam:
return eid_param(field.id, self.edited_entity.eid)
return field.id
def form_field_vocabulary(self, field, limit=None):
role, rtype = field.role, field.name
method = '%s_%s_vocabulary' % (role, rtype)
try:
vocabfunc = getattr(self, method)
except AttributeError:
try:
# XXX bw compat, <role>_<rtype>_vocabulary on the entity
vocabfunc = getattr(self.edited_entity, method)
except AttributeError:
vocabfunc = getattr(self, '%s_relation_vocabulary' % role)
else:
warn('found %s on %s, should be set on a specific form'
% (method, self.edited_entity.id), DeprecationWarning)
# NOTE: it is the responsibility of `vocabfunc` to sort the result
# (direclty through RQL or via a python sort). This is also
# important because `vocabfunc` might return a list with
# couples (label, None) which act as separators. In these
# cases, it doesn't make sense to sort results afterwards.
return vocabfunc(rtype, limit)
def subject_relation_vocabulary(self, rtype, limit=None):
"""defaut vocabulary method for the given relation, looking for
relation's object entities (i.e. self is the subject)
"""
entity = self.edited_entity
if isinstance(rtype, basestring):
rtype = entity.schema.rschema(rtype)
done = None
assert not rtype.is_final(), rtype
if entity.has_eid():
done = set(e.eid for e in getattr(entity, str(rtype)))
result = []
rsetsize = None
for objtype in rtype.objects(entity.e_schema):
if limit is not None:
rsetsize = limit - len(result)
result += self.relation_vocabulary(rtype, objtype, 'subject',
rsetsize, done)
if limit is not None and len(result) >= limit:
break
return result
def object_relation_vocabulary(self, rtype, limit=None):
"""defaut vocabulary method for the given relation, looking for
relation's subject entities (i.e. self is the object)
"""
entity = self.edited_entity
if isinstance(rtype, basestring):
rtype = entity.schema.rschema(rtype)
done = None
if entity.has_eid():
done = set(e.eid for e in getattr(entity, 'reverse_%s' % rtype))
result = []
rsetsize = None
for subjtype in rtype.subjects(entity.e_schema):
if limit is not None:
rsetsize = limit - len(result)
result += self.relation_vocabulary(rtype, subjtype, 'object',
rsetsize, done)
if limit is not None and len(result) >= limit:
break
return result
def relation_vocabulary(self, rtype, targettype, role,
limit=None, done=None):
if done is None:
done = set()
rset = self.edited_entity.unrelated(rtype, targettype, role, limit)
res = []
for entity in rset.entities():
if entity.eid in done:
continue
done.add(entity.eid)
res.append((entity.view('combobox'), entity.eid))
return res
def subject_in_state_vocabulary(self, rschema, limit=None):
"""vocabulary method for the in_state relation, looking for
relation's object entities (i.e. self is the subject) according
to initial_state, state_of and next_state relation
"""
entity = self.edited_entity
if not entity.has_eid() or not entity.in_state:
# get the initial state
rql = 'Any S where S state_of ET, ET name %(etype)s, ET initial_state S'
rset = self.req.execute(rql, {'etype': str(entity.e_schema)})
if rset:
return [(rset.get_entity(0, 0).view('combobox'), rset[0][0])]
return []
results = []
for tr in entity.in_state[0].transitions(entity):
state = tr.destination_state[0]
results.append((state.view('combobox'), state.eid))
return sorted(results)
class CompositeForm(FieldsForm):
"""form composed for sub-forms"""
def __init__(self, *args, **kwargs):
super(CompositeForm, self).__init__(*args, **kwargs)
self.forms = []
def form_add_subform(self, subform):
subform.is_subform = True
self.forms.append(subform)