本文整理汇总了Python中django.contrib.gis.measure.Distance.unit_attname方法的典型用法代码示例。如果您正苦于以下问题：Python Distance.unit_attname方法的具体用法？Python Distance.unit_attname怎么用？Python Distance.unit_attname使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类django.contrib.gis.measure.Distance的用法示例。
在下文中一共展示了Distance.unit_attname方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: get_distance
# 需要导入模块: from django.contrib.gis.measure import Distance [as 别名]
# 或者: from django.contrib.gis.measure.Distance import unit_attname [as 别名]
def get_distance(self, f, value, lookup_type):
"""
Returns the distance parameters given the value and the lookup type.
On Oracle, geometry columns with a geodetic coordinate system behave
implicitly like a geography column, and thus meters will be used as
the distance parameter on them.
"""
if not value:
return []
value = value[0]
if isinstance(value, Distance):
if f.geodetic(self.connection):
dist_param = value.m
else:
dist_param = getattr(value, Distance.unit_attname(f.units_name(self.connection)))
else:
dist_param = value
# dwithin lookups on Oracle require a special string parameter
# that starts with "distance=".
if lookup_type == 'dwithin':
dist_param = 'distance=%s' % dist_param
return [dist_param] 示例2: get_distance
# 需要导入模块: from django.contrib.gis.measure import Distance [as 别名]
# 或者: from django.contrib.gis.measure.Distance import unit_attname [as 别名]
def get_distance(self, f, value, lookup_type):
"""
Returns the distance parameters for the given geometry field,
lookup value, and lookup type. SpatiaLite only supports regular
cartesian-based queries (no spheroid/sphere calculations for point
geometries like PostGIS).
"""
if not value:
return []
value = value[0]
if isinstance(value, Distance):
if f.geodetic(self.connection):
raise ValueError('SpatiaLite does not support distance queries on '
'geometry fields with a geodetic coordinate system. '
'Distance objects; use a numeric value of your '
'distance in degrees instead.')
else:
dist_param = getattr(value, Distance.unit_attname(f.units_name(self.connection)))
else:
dist_param = value
return [dist_param] 示例3: get_distance
# 需要导入模块: from django.contrib.gis.measure import Distance [as 别名]
# 或者: from django.contrib.gis.measure.Distance import unit_attname [as 别名]
def get_distance(self, f, value, lookup_type, **kwargs):
"""
Returns the distance parameters given the value and the lookup type.
On Oracle, geometry columns with a geodetic coordinate system behave
implicitly like a geography column, and thus meters will be used as
the distance parameter on them.
"""
if not value:
return []
value = value[0]
if isinstance(value, Distance):
if f.geodetic(self.connection):
dist_param = value.m
else:
dist_param = getattr(value, Distance.unit_attname(f.units_name(self.connection)))
else:
dist_param = value
# dwithin lookups on Oracle require a special string parameter
# that starts with "distance=".
if lookup_type == 'dwithin':
dist_param = 'distance=%s' % dist_param
return [dist_param] 示例4: get_distance
# 需要导入模块: from django.contrib.gis.measure import Distance [as 别名]
# 或者: from django.contrib.gis.measure.Distance import unit_attname [as 别名]
def get_distance(self, f, value, lookup_type, **kwargs):
"""
Returns the distance parameters for the given geometry field,
lookup value, and lookup type. SpatiaLite only supports regular
cartesian-based queries (no spheroid/sphere calculations for point
geometries like PostGIS).
"""
if not value:
return []
value = value[0]
if isinstance(value, Distance):
if f.geodetic(self.connection):
raise ValueError('SpatiaLite does not support distance queries on '
'geometry fields with a geodetic coordinate system. '
'Distance objects; use a numeric value of your '
'distance in degrees instead.')
else:
dist_param = getattr(value, Distance.unit_attname(f.units_name(self.connection)))
else:
dist_param = value
return [dist_param] 示例5: get_distance
# 需要导入模块: from django.contrib.gis.measure import Distance [as 别名]
# 或者: from django.contrib.gis.measure.Distance import unit_attname [as 别名]
def get_distance(self, f, value, lookup_type, **kwargs):
"""
Returns the distance parameters for the given geometry field,
lookup value, and lookup type.
"""
if not value:
return []
value = value[0]
if isinstance(value, Distance):
if f.geodetic(self.connection):
if lookup_type == 'dwithin':
raise ValueError(
'Only numeric values of degree units are allowed on '
'geographic DWithin queries.'
)
dist_param = value.m
else:
dist_param = getattr(value, Distance.unit_attname(f.units_name(self.connection)))
else:
dist_param = value
return [dist_param] 示例6: get_distance
# 需要导入模块: from django.contrib.gis.measure import Distance [as 别名]
# 或者: from django.contrib.gis.measure.Distance import unit_attname [as 别名]
def get_distance(self, f, value, lookup_type):
"""
Returns the distance parameters given the value and the lookup type.
On Oracle, geometry columns with a geodetic coordinate system behave
implicitly like a geography column, and thus meters will be used as
the distance parameter on them.
"""
if not value:
return []
value = value[0]
if isinstance(value, Distance):
if f.geodetic(self.connection):
dist_param = value.m
else:
dist_param = getattr(value, Distance.unit_attname(f.units_name(self.connection)))
else:
dist_param = value
# dwithin lookups on oracle require a special string parameter
# that starts with "distance=".
if lookup_type == 'dwithin':
dist_param = 'distance=%s' % dist_param
return [dist_param]