author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Mon, 19 Oct 2009 18:15:39 +0200 | |
changeset 3734 | b2107f68176c |
parent 3524 | a3431f4e2f40 |
child 3998 | 94cc7cad3d2d |
permissions | -rw-r--r-- |
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"""abstract form classes for CubicWeb web client |
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:organization: Logilab |
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parents:
1962
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:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2. |
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr |
1977
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parents:
1962
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses |
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""" |
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__docformat__ = "restructuredtext en" |
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from logilab.common.decorators import iclassmethod |
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|
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R [base classes] only AppObject remaning, no more AppRsetObject
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from cubicweb.appobject import AppObject |
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from cubicweb.view import NOINDEX, NOFOLLOW |
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from cubicweb.common import tags |
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from cubicweb.web import stdmsgs, httpcache, formfields |
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|
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class FormViewMixIn(object): |
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"""abstract form view mix-in""" |
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category = 'form' |
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http_cache_manager = httpcache.NoHTTPCacheManager |
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add_to_breadcrumbs = False |
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def html_headers(self): |
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"""return a list of html headers (eg something to be inserted between |
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<head> and </head> of the returned page |
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|
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by default forms are neither indexed nor followed |
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""" |
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return [NOINDEX, NOFOLLOW] |
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def linkable(self): |
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"""override since forms are usually linked by an action, |
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so we don't want them to be listed by appli.possible_views |
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""" |
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return False |
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class metafieldsform(type): |
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"""metaclass for FieldsForm to retrieve fields defined as class attributes |
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and put them into a single ordered list: '_fields_'. |
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""" |
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def __new__(mcs, name, bases, classdict): |
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allfields = [] |
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for base in bases: |
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if hasattr(base, '_fields_'): |
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allfields += base._fields_ |
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clsfields = (item for item in classdict.items() |
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2005
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if isinstance(item[1], formfields.Field)) |
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for fieldname, field in sorted(clsfields, key=lambda x: x[1].creation_rank): |
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if not field.name: |
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field.set_name(fieldname) |
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allfields.append(field) |
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classdict['_fields_'] = allfields |
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return super(metafieldsform, mcs).__new__(mcs, name, bases, classdict) |
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class FieldNotFound(Exception): |
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"""raised by field_by_name when a field with the given name has not been |
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found |
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""" |
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class Form(AppObject): |
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__metaclass__ = metafieldsform |
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__registry__ = 'forms' |
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parent_form = None |
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def __init__(self, req, rset, **kwargs): |
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super(Form, self).__init__(req, rset=rset, **kwargs) |
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self.restore_previous_post(self.session_key()) |
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@property |
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def root_form(self): |
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"""return the root form""" |
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if self.parent_form is None: |
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return self |
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return self.parent_form.root_form |
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@iclassmethod |
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def _fieldsattr(cls_or_self): |
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if isinstance(cls_or_self, type): |
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fields = cls_or_self._fields_ |
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else: |
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fields = cls_or_self.fields |
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return fields |
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@iclassmethod |
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def field_by_name(cls_or_self, name, role='subject'): |
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"""return field with the given name and role. |
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Raise FieldNotFound if the field can't be found. |
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""" |
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for field in cls_or_self._fieldsattr(): |
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if field.name == name and field.role == role: |
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return field |
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raise FieldNotFound(name) |
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@iclassmethod |
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def fields_by_name(cls_or_self, name, role='subject'): |
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"""return a list of fields with the given name and role""" |
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return [field for field in cls_or_self._fieldsattr() |
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if field.name == name and field.role == role] |
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@iclassmethod |
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def remove_field(cls_or_self, field): |
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"""remove a field from form class or instance""" |
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cls_or_self._fieldsattr().remove(field) |
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@iclassmethod |
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def append_field(cls_or_self, field): |
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"""append a field to form class or instance""" |
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cls_or_self._fieldsattr().append(field) |
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@iclassmethod |
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def insert_field_before(cls_or_self, new_field, name, role='subject'): |
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field = cls_or_self.field_by_name(name, role) |
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fields = cls_or_self._fieldsattr() |
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fields.insert(fields.index(field), new_field) |
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@iclassmethod |
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def insert_field_after(cls_or_self, new_field, name, role='subject'): |
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field = cls_or_self.field_by_name(name, role) |
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fields = cls_or_self._fieldsattr() |
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fields.insert(fields.index(field)+1, new_field) |
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def session_key(self): |
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"""return the key that may be used to store / retreive data about a |
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128 |
previous post which failed because of a validation error |
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""" |
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return '%s#%s' % (self._cw.url(), self.domid) |
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131 |
|
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132 |
def restore_previous_post(self, sessionkey): |
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133 |
# get validation session data which may have been previously set. |
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134 |
# deleting validation errors here breaks form reloading (errors are |
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135 |
# no more available), they have to be deleted by application's publish |
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136 |
# method on successful commit |
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137 |
forminfo = self._cw.get_session_data(sessionkey, pop=True) |
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138 |
if forminfo: |
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139 |
# XXX remove req.data assigment once cw.web.widget is killed |
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self._cw.data['formvalues'] = self.form_previous_values = forminfo['values'] |
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141 |
self._cw.data['formerrors'] = self.form_valerror = forminfo['errors'] |
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142 |
self._cw.data['displayederrors'] = self.form_displayed_errors = set() |
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# if some validation error occured on entity creation, we have to |
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144 |
# get the original variable name from its attributed eid |
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foreid = self.form_valerror.entity |
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146 |
for var, eid in forminfo['eidmap'].items(): |
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if foreid == eid: |
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148 |
self.form_valerror.eid = var |
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149 |
break |
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150 |
else: |
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151 |
self.form_valerror.eid = foreid |
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152 |
else: |
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153 |
self.form_previous_values = {} |
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154 |
self.form_valerror = None |