jkR ddlmZmZddlmZmZddlmZddlm Z m Z ddl m Z m Z mZmZddlmZmZmZGdde ZGd d e Zd Zd Zd ZdZdZde_dZde_dZdZGddZdS))Counter defaultdict)partialreduce)chain) attrgetteror_)IntegrityError connectionsmodels transaction) query_utilssignalssqlceZdZfdZxZS)ProtectedErrorcZ||_t||dSN)protected_objectssuper__init__)selfmsgr __class__s h/var/www/finuniver-perm.ru/html/portfolio/venv/lib/python3.11/site-packages/django/db/models/deletion.pyrzProtectedError.__init__ s,!2 /00000__name__ __module__ __qualname__r __classcell__rs@rrr s8111111111rrceZdZfdZxZS)RestrictedErrorcZ||_t||dSr)restricted_objectsrr)rrr&rs rrzRestrictedError.__init__s,"4 011111rrr"s@rr$r$s8222222222rr$c|||jj|j|jd|jr0t |jjs||d|dSdSdS)NF)source source_attrnullablefail_on_restricted) collect remote_fieldmodelnamenullr featurescan_defer_constraint_checksadd_field_update collectorfieldsub_objsusings rCASCADEr9s !'J  z:+e,5Q:""5$99999::::rc ~td|jjjd|djjd|jd|)Nz'Cannot delete some instances of model 'z@' because they are referenced through a protected foreign key: 'r.')rr-r.rrr/r4s rPROTECTr="sP .   $ - - - QK ! * * * JJJ      rc||||||jj|jdSr)add_restricted_objectsadd_dependencyr-r.r4s rRESTRICTrA/s< $$UH555 U/5u{CCCCCrc^trfd}nfd}fd|_d|_|S)NcF|||dSrr3r5r6r7r8values r set_on_deletezSET..set_on_delete7s'  & &ueeggx @ @ @ @ @rc6|||dSrrDrEs rrGzSET..set_on_delete<s!  & &ueX > > > > >rcdfifS)Nzdjango.db.models.SET)rFsrzSET..?s)?%2(NrT)callable deconstruct lazy_sub_objs)rFrGs` rSETrO4sp? 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Return a list of all objects that were not already collected. rNreverse_dependency)rriappendupdater@) robjsr(r*rpnew_objsr. instancesobjs raddz Collector.addvs IQ!Ie$  % %C)##$$$"""  h    BT  U U Urc|r||}}|j|jj|jj|j||jdSr)rm_metaconcrete_modelrwri setdefaultdefault_factory)rr. dependencyrps rr@zCollector.add_dependencyso  2 *E:E %+4599   +    Z)B)B)D)DEEEEErcJ|j||f|dS)z Schedule a field update. 'objs' must be a homogeneous iterable collection of model instances (e.g. a QuerySet). N)rkrq)rr6rFrss rr3zCollector.add_field_updates* 5%<(//55555rct|r5|dj}|j|||dSdS)Nr)rr&rr)rr6rsr.s rr?z Collector.add_restricted_objectssG  ?G%E  #E *5 1 8 8 > > > > > ? ?rc||jvr5fd|j|D|j|<dSdS)Nc"i|] \}}||z  SrJrJ)r]r6itemsrss r z?Collector.clear_restricted_objects_from_set..s3... E5ut|...r)r&r)rr.rss `r!clear_restricted_objects_from_setz+Collector.clear_restricted_objects_from_setsc D+ + +....$($;E$B$H$H$J$J...D #E * * * , +rc||jvrbt|d|j|D}|||dSdS)Nc&g|]}|D] }|j SrJpk)r]rsrvs r zDCollector.clear_restricted_objects_from_queryset..sA #' r)pk__in)r&rhfiltervaluesr)rr.qsrss r&clear_restricted_objects_from_querysetz0Collector.clear_restricted_objects_from_querysets D+ + + $($;E$B$I$I$K$KD  2 25$ ? ? ? ? ? , +rc~tj|ptj|Sr)r pre_delete has_listeners post_delete)rr.s r_has_signal_listenerszCollector._has_signal_listenerss9!//   6  . .u 5 5 6rcrjjturdSt|dr |jj}n*t|drt|dr|j}ndS||rdS|j}tfd|jjj DoDtdt|Dotd|j D S)a Determine if the objects in the given queryset-like or single object can be fast-deleted. This can be done if there are no cascades, no parents and no signal listeners for the object class. The 'from_field' tells where we are coming from - we need this to determine if the objects are in fact to be deleted. 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'objs' must be a homogeneous iterable collection of model instances (e.g. a QuerySet). If 'collect_related' is True, related objects will be handled by their respective on_delete handler. If the call is the result of a cascade, 'source' should be the model that caused it and 'nullable' should be set to True, if the relation can be null. If 'reverse_dependency' is True, 'source' will be deleted before the current model, rather than after. (Needed for cascading to parent models, the one case in which the cascade follows the forwards direction of an FK rather than the reverse direction.) If 'keep_parents' is True, data of parent model's will be not deleted. If 'fail_on_restricted' is False, error won't be raised even if it's prohibited to delete such objects due to RESTRICT, that defers restricted object checking in recursive calls where the top-level call may need to collect more objects to determine whether restricted ones can be deleted. 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