GenericPrefetch

This class extends the standard prefetch functionality to support multiple querysets for a single lookup. It validates that provided querysets are compatible with prefetching, specifically excluding raw queries or those returning non-model results. The class also manages the internal state of these querysets to ensure they are not evaluated prematurely during serialization.

Attributes

Attribute	Type	Description
querysets	list	A list of QuerySet objects used to fetch related data for different content types in a generic relation.

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Constructor

Signature

def GenericPrefetch(
    lookup: string,
    querysets: list,
    to_attr: string = None
)

Parameters

Name	Type	Description
lookup	string	The relation to prefetch.
querysets	list	A list of querysets to use for the prefetch operation.
to_attr	string = None	An optional attribute to store the result in.

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Signature

def GenericPrefetch(
    lookup: string,
    querysets: list,
    to_attr: string = None
) - > null

Parameters

Name	Type	Description
lookup	string	The relation name or path to traverse for prefetching.
querysets	list	A collection of QuerySet instances used to fetch the related objects; must not use raw(), values(), or values_list().
to_attr	string = None	An optional attribute name to store the prefetched results on the parent objects.

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Methods

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get_current_querysets()

@classmethod
def get_current_querysets(
    level: integer
) - > list|null

Returns the list of querysets associated with this prefetch operation if the current traversal level matches the target prefetch path.

Parameters

Name	Type	Description
level	integer	The current depth or path level in the prefetch traversal process.

Returns

Type	Description
`list	null`

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