ó ø¢TQc@s dZddlmZddlmZddlmZddlmZddl m Z ddl m Z ddl mZdd lZdd lZdd lZdZdefd„ƒYZeƒZejZejZejZejZejZejZejZejZd S(s?Utilities for loading models and the modules that contain them.iÿÿÿÿ(tsettings(tImproperlyConfigured(t SortedDict(t import_module(tmodule_has_submodule(tupath(tsixNtget_appstget_appt get_modelst get_modeltregister_modelstload_apptapp_cache_readytAppCachecBsÑeZdZedeƒdideƒdidedidgdd d iƒ Zd „Zd „Zd „Z ed„Z d„Z d„Z ed„Z d„Zdeeeed„Zeed„Zd„ZRS(s” A cache that stores installed applications and their models. Used to provide reverse-relations and for app introspection (e.g. admin). t app_storet app_labelst app_modelst app_errorstloadedthandledt postponedt nesting_levelit_get_models_cachecCs|j|_dS(N(t_AppCache__shared_statet__dict__(tself((s1../Django//lib/python/django/db/models/loading.pyt__init__0scCs©|jr dStjƒz€|jr'dSx6tjD]+}||jkrLq1n|j|tƒq1W|js–x|j D]}|j|ƒqsWt|_nWdtj ƒXdS(sÝ Fill in all the cache information. This method is threadsafe, in the sense that every caller will see the same state upon return, and if the cache is already initialised, it does no work. N( Rtimpt acquire_lockRtINSTALLED_APPSRR tTrueRRt release_lock(Rtapp_name((s1../Django//lib/python/django/db/models/loading.pyt _populate3s    cCs|jjdƒdS(s< Return app_label for given models module. t.iþÿÿÿ(t__name__tsplit(Rtapp_mod((s1../Django//lib/python/django/db/models/loading.pyt _label_forPscCsßd|j|<|jd7_t|ƒ}ytd|ƒ}WnPtk r|jd8_t|dƒsmdS|r‡|jj|ƒdS‚nX|jd8_||jkrÛt |jƒ|j|<||j |j |ƒÕs(RtKeyErrorR"RRtgetR'RRtiterkeysRt itervaluestextendtvalues( RR&RBRAtonly_installedR@t cache_keytapp_listR6t model_listtapp((RAR@RBs1../Django//lib/python/django/db/models/loading.pyR ©s*   7 ' cCsQ|r|jƒn|r,||jkr,dS|jj|tƒƒj|jƒƒS(s• Returns the model matching the given app_label and case-insensitive model_name. Returns None if no model is found. N(R"RR)RRDRtlower(RR6t model_namet seed_cacheRI((s1../Django//lib/python/django/db/models/loading.pyR Ýs  cGsåxÑ|D]É}|jjjƒ}|jj|tƒƒ}||krÆtjjt t j |j j ƒƒ}tjjt t j ||j j ƒƒ}tjj|ƒdtjj|ƒdkrÆqqÆn|||s,   ï