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This module holds simple classes to convert geospatial values from the
database.
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zAreaField.__init__
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isinstancer �
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connection�prepared�area_atts r �get_db_prep_valuezAreaField.get_db_prep_value s= � � �=� �F� �>�8�8�� �H�H��+3�>�w�u�h�'�'�'��>r c � � |�d S t |t � � rt |� � }|j � | j � � }|rt
di ||i��n|S �N� )r r �floatr r r r )r r �
expressionr r s r �
from_db_valuezAreaField.from_db_value se � � �=� �F� �e�W� %� %� !��%�L�L�E� �>�8�8�� �H�H��,4�?�t�(�(�x��'�(�(�(�%�?r c � � dS )Nr r$ �r s r �get_internal_typezAreaField.get_internal_type' s � ��{r �F�
�__name__�
__module__� __qualname__�__doc__r
r r! r' r* �
__classcell__�r s @r r r s� �� � � � � � � �#� #� #� #� #�� � �
?� ?� ?� ?� @� @� @�� � � � � � r r c �@ � � e Zd ZdZ� fd�Z� fd�Zdd�Zd� Zd� Z� xZ S ) �
DistanceFieldz Wrapper for Distance values.c �V �� t � � � � � || _ d S r
r r s �r r
zDistanceField.__init__- r r c �t �� t |t � � r|S t � � � |� � S r
)r r r r )r r r s �r r z DistanceField.get_prep_value1 s2 �� � �e�X� &� &� ��L��w�w�%�%�e�,�,�,r Fc � � t |t � � s|S |j � | j � � }|st d� � �t
||� � S )Nz?Distance measure is supplied, but units are unknown for result.)r r r �get_distance_att_for_fieldr r r )r r r r � distance_atts r r! z DistanceField.get_db_prep_value6 sX � ��%��*�*� ��L�!�~�@�@�� �P�P� �� `� � ^�_�_� _��u�l�+�+�+r c �l � |�d S |j � | j � � }|rt di ||i��n|S r# )r r8 r r )r r r& r r9 s r r' zDistanceField.from_db_value> sF � � �=� �F�!�~�@�@�� �P�P� �4@�K�x�0�0�<��/�0�0�0�e�Kr c � � dS )Nr4 r$ r) s r r* z DistanceField.get_internal_typeD s � � �r r+ r, r2 s @r r4 r4 + s� �� � � � � �"�"�#� #� #� #� #�-� -� -� -� -�
,� ,� ,� ,�L� L� L� � � � � � � r r4 N) r0 �decimalr �django.contrib.gis.measurer r � django.dbr �
FloatFieldr r4 r$ r r �<module>r@ s� ��� � � � � � � � 5� 5� 5� 5� 5� 5� 5� 5� � � � � � � � � � � ��!� � � �@ � � � � �F�%� � � � � r