U 7h1@sddlZddlZddlmZddlmZeddZeedZ GdddZ d d Z dd d Z dd dZ dddZddZdS)N) namedtuple)RECURSIVE_RELATIONSHIP_CONSTANTFieldReferencez to throughc@seZdZddZddZdS) RegexObjectcCs|j|_|j|_dSN)patternflags)selfobjr T/var/www/formularioweb/env/lib/python3.8/site-packages/django/db/migrations/utils.py__init__ szRegexObject.__init__cCs&t|tstS|j|jko$|j|jkSr) isinstancerNotImplementedrr )r otherr r r __eq__s zRegexObject.__eq__N)__name__ __module__ __qualname__rrr r r r r srcCstjdS)Nz %Y%m%d_%H%M)datetimenowstrftimer r r r get_migration_name_timestampsrcCst|trr|tkr2|dks"|dkr*td||fSd|krV|dd\}}||fS|dkrftd||fS|jj|jjfS)z Turn a model class or model reference string and return a model tuple. app_label and model_name are used to resolve the scope of recursive and unscoped model relationship. NzMapp_label and model_name must be provided to resolve recursive relationships..zCapp_label must be provided to resolve unscoped model relationships.) rstrr TypeErrorsplitlower_meta app_label model_name)modelr!r"r r r resolve_relations    r$c Cs|j}|sdSd}d}t|jf||krlt|dd}|dksd|dksdd|kr\|dksd|jsd||krl||f}t|dd} | rt| f||kr|j} |dks| dks|| kr|| f}|s|sdSt||S)at Return either False or a FieldReference if `field` references provided context. False positives can be returned if `reference_field_name` is provided without `reference_field` because of the introspection limitation it incurs. This should not be an issue when this function is used to determine whether or not an optimization can take place. FN to_fieldsthrough) remote_fieldr$r#getattrZ primary_keythrough_fieldsr) model_tuplefieldZreference_model_tupleZreference_field_nameZreference_fieldr'Z references_toZreferences_throughr%r&r)r r r field_references5sB      r,r ccsP|jD]@\}}|jD],\}}t|||f|}|r||||fVqq dS)z Generator of (model_state, name, field, reference) referencing provided context. If field_tuple is provided only references to this particular field of model_tuple will be generated. N)modelsitemsfieldsr,)stater* field_tupleZstate_model_tupleZ model_statenamer+ referencer r r get_referencesnsr4cCstt|||ddk S)z?Return whether `field_tuple` is referenced by any state models.N)nextr4)r0r*r1r r r field_is_referencedsr6)NN)NN)r )rre collectionsrZdjango.db.models.fields.relatedrrtypecompileZCOMPILED_REGEX_TYPErrr$r,r4r6r r r r s      9