add parameter to get the list field options from an external source (#1459)
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# w.c.s. - web application for online forms
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# Copyright (C) 2005-2012 Entr'ouvert
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, see <http://www.gnu.org/licenses/>.
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from quixote.html import htmltext, TemplateIO
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from qommon.form import *
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data_source_functions = {}
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def register_data_source_function(function, function_name=None):
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if not function_name:
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function_name = function.__name__
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if not function_name in data_source_functions:
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data_source_functions[function_name] = function
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class DataSourceSelectionWidget(CompositeWidget):
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def __init__(self, name, value = None, **kwargs):
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CompositeWidget.__init__(self, name, value, **kwargs)
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if not value:
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value = {}
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options = [('none', _('None')),
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('formula', _('Formula (Python)'))]
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self.add(SingleSelectWidget, 'type', options = options, value = value.get('type'))
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self.parse()
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if not self.value:
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self.value = {}
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if self.value.get('type') == 'formula':
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self.add(StringWidget, 'value', value = value.get('value'))
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self.add(SubmitWidget, 'apply', value = _('Apply'))
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self._parsed = False
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def _parse(self, request):
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values = {}
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for name in ('type', 'value'):
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value = self.get(name)
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if value:
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values[name] = value
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if values.get('data', '').startswith('------'):
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values = None
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self.value = values or None
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def render_content(self):
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r = TemplateIO(html=True)
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for widget in self.get_widgets():
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r += widget.render_content()
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return r.getvalue()
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def get_items(data_source):
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if data_source.get('type') == 'formula':
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vars = get_publisher().substitutions.get_context_variables()
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return eval(data_source.get('value'), vars, data_source_functions)
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return []
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@ -33,6 +33,8 @@ from qommon import get_cfg, get_logger
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from qommon.strftime import strftime
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import data_sources
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def fixcsv(self, v):
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if type(s) is not str: return s
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@ -113,6 +115,7 @@ class Field:
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convert_value_to_str = None
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in_listing = False
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prefill = None
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store_display_value = None
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stats = None
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@ -649,33 +652,72 @@ class ItemField(WidgetField):
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items = []
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show_as_radio = False
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widget_class = SingleSelectHintWidget
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data_source = None
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def __init__(self, **kwargs):
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self.items = []
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WidgetField.__init__(self, **kwargs)
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def perform_more_widget_changes(self, form, kwargs, edit = True):
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if edit:
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kwargs['options'] = self.items or [(None, '---')]
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if self.show_as_radio:
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self.widget_class = RadiobuttonsWidget
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if len(kwargs['options']) > 3 or len(self.items[0]) > 10:
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# TODO: absence/presence of delimitor should be an option
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kwargs['delim'] = htmltext('<br />')
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if self.data_source:
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kwargs['options'] = data_sources.get_items(self.data_source)
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elif self.items:
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kwargs['options'] = self.items
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else:
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self.widget_class = StringWidget
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kwargs['options'] = [(None, '---')]
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if self.show_as_radio:
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self.widget_class = RadiobuttonsWidget
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if len(kwargs['options']) > 3 or len(self.items[0]) > 10:
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# TODO: absence/presence of delimitor should be an option
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kwargs['delim'] = htmltext('<br />')
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def get_display_value(self, value):
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real_value = value
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label_value = str(value)
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kwargs = {}
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self.perform_more_widget_changes(form, kwargs, False)
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if type(kwargs['options'][0]) in (tuple, list):
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for key, value in kwargs['options']:
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if str(key) == str(real_value):
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label_value = value
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break
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return label_value
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def add_to_view_form(self, form, value = None):
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real_value = value
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label_value = self.get_display_value(value)
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self.field_key = 'f%s' % self.id
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get_request().form[self.field_key + '_label'] = label_value # :/
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form.add(StringWidget, self.field_key + '_label', title = self.label,
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value=label_value, readonly = 'readonly', size=len(label_value))
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form.add(HiddenWidget, self.field_key, value=real_value)
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def store_display_value(self, value):
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kwargs = {}
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self.perform_more_widget_changes(None, kwargs, False)
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if type(kwargs['options'][0]) in (tuple, list):
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for key, option_value in kwargs['options']:
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if str(key) == str(value):
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return option_value
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return str(value)
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def fill_admin_form(self, form):
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WidgetField.fill_admin_form(self, form)
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form.add(WidgetList, 'items', title = _('Items'), element_type = StringWidget,
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value = self.items, required = True,
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element_kwargs = {'render_br': False, 'size': 50},
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add_element_label = _('Add item'))
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form.add(CheckboxWidget, 'show_as_radio', title = _('Show as radio buttons'),
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value = self.show_as_radio)
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form.add(WidgetList, 'items', title = _('Items'), element_type = StringWidget,
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value = self.items, required = False,
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element_kwargs = {'render_br': False, 'size': 50},
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add_element_label = _('Add item'))
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form.add(data_sources.DataSourceSelectionWidget, 'data_source',
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value=self.data_source,
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title=_('External Data Source'),
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hint=_('This will get the available items from an external source.'),
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required=False)
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def get_admin_attributes(self):
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return WidgetField.get_admin_attributes(self) + ['items', 'show_as_radio']
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return WidgetField.get_admin_attributes(self) + ['items', 'show_as_radio', 'data_source']
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def check_admin_form(self, form):
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items = form.get_widget('items').parse()
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@ -320,6 +320,12 @@ class FormDef(StorableObject):
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d[field.id] = widget.parse()
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if d.get(field.id) and field.convert_value_from_str:
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d[field.id] = field.convert_value_from_str(d[field.id])
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if d.get(field.id) and field.store_display_value:
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display_value = field.store_display_value(d[field.id])
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if display_value:
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d['%s_display' % field.id] = display_value
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elif d.has_key('%s_display' % field.id):
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del d['%s_display' % field.id]
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if widget and widget.cleanup:
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widget.cleanup()
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@ -275,7 +275,12 @@ class FormStatusPage(Directory):
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if not self.filled.data.has_key(f.id):
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continue
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value = self.filled.data[f.id]
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if f.store_display_value:
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value = self.filled.data['%s_display' % f.id]
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else:
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value = self.filled.data[f.id]
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if value is None or value == '':
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continue
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