点域的纬度/经度窗口小部件 [英] Latitude/longitude widget for pointfield?
本文介绍了点域的纬度/经度窗口小部件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
PointField是否具有单独的纬度/经度输入?像DateTimeField的SplitDateTimeWidget一样。
解决方案
这是我工作的自定义字段和小部件:
b
将点输入分割为两个纬度/经度框的小部件
def __init __(self,attrs = None,date_format = None,time_format = None):
widgets =(forms.TextInput(attrs = attrs),
forms.TextInput (attrs = attrs))
super(LatLongWidget,self).__ init __(widgets,attrs)
def解压缩(self,value):
如果值:
return tuple(revers(value.coords))
return(None,None)
class LatLongField(forms.MultiValueField):
widget = LatLongWidget
srid = 4326
default_error_messages = {
'invalid_latitude':_('输入有效的纬度'),
'invalid_longitude':_('输入有效的经度'),
}
def __init __(self,* args,** kwargs):
fields =(forms.FloatField(min_value = -90,max_value =
forms.FloatField(min_value = -180,max_value = 180))
super(LatLongField,self).__ init __(fields,* args,** kwargs)
def compress(self,data_list):
如果data_list:
#如果纬度或经度为空,则提高验证错误
#(如果LatLongField为required = False,则为可能)。
如果data_list [0] in validators.EMPTY_VALUES:
raise forms.ValidationError(self.error_messages ['invalid_latitude'])
如果data_list [1]在validators.EMPTY_VALUES:
raise form.ValidationError(self.error_messages ['invalid_longitude'])
#SRID = 4326; POINT(1.12345789 1.123456789)
srid_str ='SRID =%d'%self.srid
point_str = 'POINT(%f%f)'%tuple(reversed(data_list))
return';'。join([srid_str,point_str])
return无
Is there a widget for PointField as separate latitude/longitude inputs? Like SplitDateTimeWidget for DateTimeField.
解决方案
Here's my working custom field and widget:
class LatLongWidget(forms.MultiWidget):
"""
A Widget that splits Point input into two latitude/longitude boxes.
"""
def __init__(self, attrs=None, date_format=None, time_format=None):
widgets = (forms.TextInput(attrs=attrs),
forms.TextInput(attrs=attrs))
super(LatLongWidget, self).__init__(widgets, attrs)
def decompress(self, value):
if value:
return tuple(reversed(value.coords))
return (None, None)
class LatLongField(forms.MultiValueField):
widget = LatLongWidget
srid = 4326
default_error_messages = {
'invalid_latitude' : _('Enter a valid latitude.'),
'invalid_longitude' : _('Enter a valid longitude.'),
}
def __init__(self, *args, **kwargs):
fields = (forms.FloatField(min_value=-90, max_value=90),
forms.FloatField(min_value=-180, max_value=180))
super(LatLongField, self).__init__(fields, *args, **kwargs)
def compress(self, data_list):
if data_list:
# Raise a validation error if latitude or longitude is empty
# (possible if LatLongField has required=False).
if data_list[0] in validators.EMPTY_VALUES:
raise forms.ValidationError(self.error_messages['invalid_latitude'])
if data_list[1] in validators.EMPTY_VALUES:
raise forms.ValidationError(self.error_messages['invalid_longitude'])
# SRID=4326;POINT(1.12345789 1.123456789)
srid_str = 'SRID=%d'%self.srid
point_str = 'POINT(%f %f)'%tuple(reversed(data_list))
return ';'.join([srid_str, point_str])
return None
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