216 lines
7.4 KiB
Python
216 lines
7.4 KiB
Python
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from __future__ import unicode_literals
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import decimal
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import operator
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from wtforms import fields, widgets
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from wtforms.compat import text_type, string_types
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class ReferencePropertyField(fields.SelectFieldBase):
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"""
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A field for ``db.ReferenceProperty``. The list items are rendered in a
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select.
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:param reference_class:
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A db.Model class which will be used to generate the default query
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to make the list of items. If this is not specified, The `query`
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property must be overridden before validation.
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:param get_label:
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If a string, use this attribute on the model class as the label
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associated with each option. If a one-argument callable, this callable
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will be passed model instance and expected to return the label text.
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Otherwise, the model object's `__str__` or `__unicode__` will be used.
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:param allow_blank:
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If set to true, a blank choice will be added to the top of the list
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to allow `None` to be chosen.
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:param blank_text:
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Use this to override the default blank option's label.
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"""
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widget = widgets.Select()
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def __init__(self, label=None, validators=None, reference_class=None,
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get_label=None, allow_blank=False,
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blank_text='', **kwargs):
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super(ReferencePropertyField, self).__init__(label, validators,
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**kwargs)
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if get_label is None:
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self.get_label = lambda x: x
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elif isinstance(get_label, string_types):
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self.get_label = operator.attrgetter(get_label)
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else:
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self.get_label = get_label
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self.allow_blank = allow_blank
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self.blank_text = blank_text
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self._set_data(None)
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if reference_class is not None:
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self.query = reference_class.all()
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def _get_data(self):
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if self._formdata is not None:
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for obj in self.query:
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if str(obj.key()) == self._formdata:
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self._set_data(obj)
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break
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return self._data
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def _set_data(self, data):
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self._data = data
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self._formdata = None
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data = property(_get_data, _set_data)
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def iter_choices(self):
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if self.allow_blank:
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yield ('__None', self.blank_text, self.data is None)
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for obj in self.query:
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key = str(obj.key())
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label = self.get_label(obj)
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yield (key, label, (self.data.key() == obj.key()) if self.data else False)
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def process_formdata(self, valuelist):
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if valuelist:
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if valuelist[0] == '__None':
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self.data = None
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else:
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self._data = None
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self._formdata = valuelist[0]
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def pre_validate(self, form):
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if not self.allow_blank or self.data is not None:
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for obj in self.query:
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if str(self.data.key()) == str(obj.key()):
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break
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else:
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raise ValueError(self.gettext('Not a valid choice'))
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class KeyPropertyField(fields.SelectFieldBase):
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"""
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A field for ``ndb.KeyProperty``. The list items are rendered in a select.
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:param reference_class:
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A db.Model class which will be used to generate the default query
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to make the list of items. If this is not specified, The `query`
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property must be overridden before validation.
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:param get_label:
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If a string, use this attribute on the model class as the label
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associated with each option. If a one-argument callable, this callable
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will be passed model instance and expected to return the label text.
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Otherwise, the model object's `__str__` or `__unicode__` will be used.
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:param allow_blank:
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If set to true, a blank choice will be added to the top of the list
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to allow `None` to be chosen.
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:param blank_text:
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Use this to override the default blank option's label.
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"""
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widget = widgets.Select()
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def __init__(self, label=None, validators=None, reference_class=None,
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get_label=None, allow_blank=False, blank_text='', **kwargs):
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super(KeyPropertyField, self).__init__(label, validators, **kwargs)
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if get_label is None:
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self.get_label = lambda x: x
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elif isinstance(get_label, basestring):
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self.get_label = operator.attrgetter(get_label)
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else:
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self.get_label = get_label
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self.allow_blank = allow_blank
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self.blank_text = blank_text
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self._set_data(None)
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if reference_class is not None:
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self.query = reference_class.query()
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def _get_data(self):
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if self._formdata is not None:
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for obj in self.query:
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if str(obj.key.id()) == self._formdata:
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self._set_data(obj)
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break
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return self._data
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def _set_data(self, data):
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self._data = data
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self._formdata = None
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data = property(_get_data, _set_data)
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def iter_choices(self):
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if self.allow_blank:
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yield ('__None', self.blank_text, self.data is None)
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for obj in self.query:
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key = str(obj.key.id())
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label = self.get_label(obj)
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yield (key, label, (self.data.key == obj.key) if self.data else False)
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def process_formdata(self, valuelist):
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if valuelist:
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if valuelist[0] == '__None':
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self.data = None
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else:
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self._data = None
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self._formdata = valuelist[0]
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def pre_validate(self, form):
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if self.data is not None:
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for obj in self.query:
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if self.data.key == obj.key:
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break
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else:
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raise ValueError(self.gettext('Not a valid choice'))
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elif not self.allow_blank:
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raise ValueError(self.gettext('Not a valid choice'))
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class StringListPropertyField(fields.TextAreaField):
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"""
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A field for ``db.StringListProperty``. The list items are rendered in a
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textarea.
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"""
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def _value(self):
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if self.raw_data:
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return self.raw_data[0]
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else:
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return self.data and text_type("\n".join(self.data)) or ''
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def process_formdata(self, valuelist):
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if valuelist:
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try:
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self.data = valuelist[0].splitlines()
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except ValueError:
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raise ValueError(self.gettext('Not a valid list'))
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class IntegerListPropertyField(fields.TextAreaField):
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"""
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A field for ``db.StringListProperty``. The list items are rendered in a
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textarea.
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"""
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def _value(self):
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if self.raw_data:
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return self.raw_data[0]
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else:
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return text_type('\n'.join(self.data)) if self.data else ''
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def process_formdata(self, valuelist):
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if valuelist:
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try:
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self.data = [int(value) for value in valuelist[0].splitlines()]
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except ValueError:
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raise ValueError(self.gettext('Not a valid integer list'))
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class GeoPtPropertyField(fields.TextField):
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def process_formdata(self, valuelist):
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if valuelist:
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try:
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lat, lon = valuelist[0].split(',')
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self.data = '%s,%s' % (decimal.Decimal(lat.strip()), decimal.Decimal(lon.strip()),)
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except (decimal.InvalidOperation, ValueError):
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raise ValueError('Not a valid coordinate location')
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