/usr/local/lib/python3.9/site-packages/django/contrib/gis/db/models/__pycache__
a Ӱ�he � @ s$ d Z ddlmZ G dd� de�ZdS )a The SpatialProxy object allows for lazy-geometries and lazy-rasters. The proxy uses Python descriptors for instantiating and setting Geometry or Raster objects corresponding to geographic model fields. Thanks to Robert Coup for providing this functionality (see #4322). � )�DeferredAttributec s4 e Zd Zd� fdd� Zd � fdd� Zdd� Z� ZS ) � SpatialProxyNc s || _ |p || _t� �|� dS )zy Initialize on the given Geometry or Raster class (not an instance) and the corresponding field. N)�_klass� _load_func�super�__init__)�self�klass�fieldZ load_func�� __class__� �L/usr/local/lib/python3.9/site-packages/django/contrib/gis/db/models/proxy.pyr s zSpatialProxy.__init__c s� |du r | S z|j | jj }W n ty> t� �||�}Y n0 t|| j�rR|}n0|du sb|dkrhd}n| �|�}t || jj|� |S )z� Retrieve the geometry or raster, initializing it using the corresponding class specified during initialization and the value of the field. Currently, GEOS or OGR geometries as well as GDALRasters are supported. N� ) �__dict__r �attname�KeyErrorr �__get__� isinstancer r �setattr)r �instance�clsZ geo_valueZgeo_objr r r r s zSpatialProxy.__get__c C s� | j j}|dkr,|du s�t|tt| jf�r,nTt|| j�rN|jdu r�| j j|_n2|du s�t|ttf�rfntd|j j |t |�f ��||j | j j < |S )z� Retrieve the proxied geometry or raster with the corresponding class specified during initialization. To set geometries, use values of None, HEXEWKB, or WKT. To set rasters, use JSON or dict values. ZRASTERNz6Cannot set %s SpatialProxy (%s) with value of type: %s)r Z geom_typer �str�dictr Zsrid� memoryview� TypeErrorr �__name__�typer r )r r �value�gtyper r r �__set__1 s& �� ��zSpatialProxy.__set__)N)N)r � __module__� __qualname__r r r � __classcell__r r r r r s r N)�__doc__Z django.db.models.query_utilsr r r r r r �<module> s
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__init__.cpython-39.pyc
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aggregates.cpython-39.pyc
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fields.cpython-39.pyc
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functions.cpython-39.pyc
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lookups.cpython-39.pyc
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proxy.cpython-39.pyc
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