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a17699d261
* 19644 set atomic transactions to appropriate database * 19644 set atomic transactions for Job Script run * 19644 set atomic transactions to appropriate database * 19644 set atomic transactions to appropriate database * 19644 fix review comments * 19644 fix review comments
79 lines
2.4 KiB
Python
79 lines
2.4 KiB
Python
from django.apps import apps
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from django.contrib.contenttypes.models import ContentType
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from django.db import router, transaction
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def compile_path_node(ct_id, object_id):
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return f'{ct_id}:{object_id}'
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def decompile_path_node(repr):
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ct_id, object_id = repr.split(':')
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return int(ct_id), int(object_id)
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def object_to_path_node(obj):
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"""
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Return a representation of an object suitable for inclusion in a CablePath path. Node representation is in the
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form <ContentType ID>:<Object ID>.
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"""
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ct = ContentType.objects.get_for_model(obj)
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return compile_path_node(ct.pk, obj.pk)
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def path_node_to_object(repr):
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"""
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Given the string representation of a path node, return the corresponding instance. If the object no longer
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exists, return None.
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"""
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ct_id, object_id = decompile_path_node(repr)
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ct = ContentType.objects.get_for_id(ct_id)
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return ct.model_class().objects.filter(pk=object_id).first()
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def create_cablepath(terminations):
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"""
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Create CablePaths for all paths originating from the specified set of nodes.
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:param terminations: Iterable of CableTermination objects
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"""
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from dcim.models import CablePath
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cp = CablePath.from_origin(terminations)
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if cp:
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cp.save()
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def rebuild_paths(terminations):
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"""
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Rebuild all CablePaths which traverse the specified nodes.
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"""
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from dcim.models import CablePath
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for obj in terminations:
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cable_paths = CablePath.objects.filter(_nodes__contains=obj)
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with transaction.atomic(using=router.db_for_write(CablePath)):
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for cp in cable_paths:
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cp.delete()
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create_cablepath(cp.origins)
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def update_interface_bridges(device, interface_templates, module=None):
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"""
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Used for device and module instantiation. Iterates all InterfaceTemplates with a bridge assigned
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and applies it to the actual interfaces.
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"""
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Interface = apps.get_model('dcim', 'Interface')
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for interface_template in interface_templates.exclude(bridge=None):
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interface = Interface.objects.get(device=device, name=interface_template.resolve_name(module=module))
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if interface_template.bridge:
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interface.bridge = Interface.objects.get(
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device=device,
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name=interface_template.bridge.resolve_name(module=module)
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)
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interface.full_clean()
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interface.save()
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