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refactor get_prefetches_for_serializer

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This commit is contained in:
Renato Almeida de Oliveira Zaroubin 2025-02-26 12:01:06 +00:00
parent 5ea85b410e
commit 53e8da674f
1 changed files with 9 additions and 12 deletions
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21
netbox/utilities/api.py
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@ -3,7 +3,7 @@ from django.core.exceptions import (
FieldDoesNotExist, FieldError, MultipleObjectsReturned, ObjectDoesNotExist, ValidationError,
)
from django.db.models.fields.related import ManyToOneRel, RelatedField
from django.db.models import Count, Prefetch
from django.db.models import Prefetch
from django.urls import reverse
from django.utils.module_loading import import_string
from django.utils.translation import gettext_lazy as _
@ -88,7 +88,14 @@ def get_prefetches_for_serializer(serializer_class, fields_to_include=None, sour
fields_to_include = serializer_class.Meta.fields
prefetch_fields = []
annotated_prefetch = {}
# If this serializer is nested, get annotations and prefetches for the nested serializer
if source_field is not None:
nested_annotations = get_annotations_for_serializer(serializer_class, fields_to_include=fields_to_include)
if nested_annotations:
related_prefetch = Prefetch(source_field, queryset=model.objects.all().annotate(**nested_annotations))
prefetch_fields.append(related_prefetch)
for field_name in fields_to_include:
serializer_field = serializer_class._declared_fields.get(field_name)
@ -97,12 +104,6 @@ def get_prefetches_for_serializer(serializer_class, fields_to_include=None, sour
if serializer_field and serializer_field.source:
model_field_name = serializer_field.source
# If the serializer field is a RelatedObjectCountField and its a nested field
# Add an annotation to the annotated_prefetch
if isinstance(serializer_field, RelatedObjectCountField) and source_field is not None:
if model_field_name not in annotated_prefetch:
annotated_prefetch[model_field_name] = Count(serializer_field.relation)
# If the serializer field does not map to a discrete model field, skip it.
try:
field = model._meta.get_field(model_field_name)
@ -124,10 +125,6 @@ def get_prefetches_for_serializer(serializer_class, fields_to_include=None, sour
else:
prefetch_fields.append(f'{field_name}__{subfield}')
# If there are annotated_prefetch, add the annotaded prefetch to the prefetch_fields
if annotated_prefetch:
related_prefetch = Prefetch(source_field, queryset=model.objects.all().annotate(**annotated_prefetch))
prefetch_fields.append(related_prefetch)
return prefetch_fields