web/form.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 23 Sep 2009 15:26:47 +0200
changeset 3435 84036ad2c82d
parent 3023 7864fee8b4ec
child 3451 6b46d73823f5
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add anon user for TestServerConfiguration, no only AppTestConfiguration
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"""abstract form classes for CubicWeb web client
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:organization: Logilab
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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
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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 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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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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        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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# XXX should disappear
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class FormMixIn(object):
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    """abstract form mix-in
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    XXX: you should inherit from this FIRST (obscure pb with super call)
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    """
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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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        previous post which failed because of a validation error
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        """
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        return '%s#%s' % (self.req.url(), self.domid)
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    def __init__(self, req, rset, **kwargs):
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        super(FormMixIn, self).__init__(req, rset=rset, **kwargs)
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        self.restore_previous_post(self.session_key())
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    def restore_previous_post(self, sessionkey):
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        # get validation session data which may have been previously set.
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        # deleting validation errors here breaks form reloading (errors are
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        # no more available), they have to be deleted by application's publish
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        # method on successful commit
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        forminfo = self.req.get_session_data(sessionkey, pop=True)
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        if forminfo:
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            # XXX remove req.data assigment once cw.web.widget is killed
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            self.req.data['formvalues'] = self.form_previous_values = forminfo['values']
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            self.req.data['formerrors'] = self.form_valerror = forminfo['errors']
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            self.req.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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            # get the original variable name from its attributed eid
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            foreid = self.form_valerror.entity
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            for var, eid in forminfo['eidmap'].items():
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                if foreid == eid:
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                    self.form_valerror.eid = var
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                    break
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            else:
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                self.form_valerror.eid = foreid
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        else:
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            self.form_previous_values = {}
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            self.form_valerror = None
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    # XXX deprecated with new form system. Should disappear
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    domid = 'entityForm'
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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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        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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    def button(self, label, klass='validateButton', tabindex=None, **kwargs):
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        if tabindex is None:
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            tabindex = self.req.next_tabindex()
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        return tags.input(value=label, klass=klass, **kwargs)
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    def action_button(self, label, onclick=None, __action=None, **kwargs):
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        if onclick is None:
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            onclick = "postForm('__action_%s', \'%s\', \'%s\')" % (
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                __action, label, self.domid)
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        return self.button(label, onclick=onclick, **kwargs)
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    def button_ok(self, label=None, type='submit', name='defaultsubmit',
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                  **kwargs):
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        label = self.req._(label or stdmsgs.BUTTON_OK).capitalize()
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        return self.button(label, name=name, type=type, **kwargs)
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    def button_apply(self, label=None, type='button', **kwargs):
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        label = self.req._(label or stdmsgs.BUTTON_APPLY).capitalize()
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        return self.action_button(label, __action='apply', type=type, **kwargs)
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    def button_delete(self, label=None, type='button', **kwargs):
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        label = self.req._(label or stdmsgs.BUTTON_DELETE).capitalize()
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        return self.action_button(label, __action='delete', type=type, **kwargs)
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    def button_cancel(self, label=None, type='button', **kwargs):
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        label = self.req._(label or stdmsgs.BUTTON_CANCEL).capitalize()
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        return self.action_button(label, __action='cancel', type=type, **kwargs)
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    def button_reset(self, label=None, type='reset', name='__action_cancel',
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                     **kwargs):
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        label = self.req._(label or stdmsgs.BUTTON_CANCEL).capitalize()
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        return self.button(label, type=type, **kwargs)
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    def need_multipart(self, entity, categories=('primary', 'secondary')):
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        """return a boolean indicating if form's enctype should be multipart
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        """
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        for rschema, _, x in entity.relations_by_category(categories):
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            if entity.get_widget(rschema, x).need_multipart:
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                return True
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        # let's find if any of our inlined entities needs multipart
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        for rschema, targettypes, x in entity.relations_by_category('inlineview'):
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            assert len(targettypes) == 1, \
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                   "I'm not able to deal with several targets and inlineview"
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            ttype = targettypes[0]
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            inlined_entity = self.vreg.etype_class(ttype)(self.req, None, None)
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            for irschema, _, x in inlined_entity.relations_by_category(categories):
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                if inlined_entity.get_widget(irschema, x).need_multipart:
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                    return True
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        return False
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0
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    def error_message(self):
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        """return formatted error message
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        This method should be called once inlined field errors has been consumed
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        """
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        errex = self.req.data.get('formerrors') or self.form_valerror
0
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        # get extra errors
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        if errex is not None:
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            errormsg = self.req._('please correct the following errors:')
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            displayed = self.req.data.get('displayederrors') or self.form_displayed_errors
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            errors = sorted((field, err) for field, err in errex.errors.items()
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                            if not field in displayed)
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            if errors:
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                if len(errors) > 1:
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                    templstr = '<li>%s</li>\n'
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                else:
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                    templstr = '&#160;%s\n'
0
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                for field, err in errors:
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                    if field is None:
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                        errormsg += templstr % err
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                    else:
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                        errormsg += templstr % '%s: %s' % (self.req._(field), err)
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                if len(errors) > 1:
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                    errormsg = '<ul>%s</ul>' % errormsg
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            return u'<div class="errorMessage">%s</div>' % errormsg
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        return u''
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###############################################################################
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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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                     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(FormMixIn, AppObject):
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    __metaclass__ = metafieldsform
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    __registry__ = 'forms'