B 0H[@sddlZddlZddlZddlmZddlmZddlmZddl m Z ddl m Z ddl mZmZmZmZmZmZddlmZmZmZmZmZmZmZdd lmZdd lmZm Z dd l!m"Z"m#Z#m$Z$m%Z%dd l&m'Z'dd l(m)Z)ddl*m+Z+ddl,m-Z-m.Z.m/Z/m0Z0m1Z1ddl2m3Z3ddl4m5Z5ddl6m7Z7m8Z8ddl9m:Z;ddle>Z?d-ddZ@GdddeAZBGdddZCGdddZDGdd d eBd!ZEd.d"d#ZFd$d%ZGd&d'ZHd(d)ZId*eI_Jd+d,ZKdS)/N) partialmethod)chain)apps)settings)checks)NON_FIELD_ERRORSFieldDoesNotExist FieldErrorMultipleObjectsReturnedObjectDoesNotExistValidationError)DEFAULT_DB_ALIASDJANGO_VERSION_PICKLE_KEY DatabaseError connection connectionsrouter transaction) LOOKUP_SEP)CASCADE Collector)ForeignObjectRel OneToOneFieldlazy_related_operationresolve_relation)Manager)Options)Q)class_prepared post_init post_savepre_initpre_save)make_model_tuple) force_text)capfirst get_text_list) gettext_lazy) get_versionc@seZdZddZddZdS)DeferredcCsdS)Nz)selfr*r*YC:\Users\HIRONO~1\AppData\Local\Temp\pip-install-6bm3nxem\django\django\db\models\base.py__repr__%szDeferred.__repr__cCsdS)Nzr*)r+r*r*r,__str__(szDeferred.__str__N)__name__ __module__ __qualname__r-r.r*r*r*r,r)$sr)csBd|i}dk r6fdd}dd}||d<||d<t||S) a  Create exception subclass. Used by ModelBase below. If 'attached_to' is supplied, the exception will be created in a way that allows it to be pickled, assuming the returned exception class will be added as an attribute to the 'attached_to' class. r0Ncstf|jfS)N)unpickle_inner_exceptionargs)r+) attached_tonamer*r, __reduce__9sz&subclass_exception..__reduce__cSs ||_dS)N)r3)r+r3r*r*r, __setstate__>sz(subclass_exception..__setstate__r6r7)type)r5parentsmoduler4 class_dictr6r7r*)r4r5r,subclass_exception/sr<csHeZdZdZfddZddZddZedd Zed d Z Z S) ModelBasezMetaclass for all models.c! stj}dd|D}|s(|||||S|d}d|i}|dd}|dk rV||d<|||||} |dd} t| dd} | st| dd} n| } t| dd} d}t|}t| d ddkr|dkr| std ||fn|j}| dt | || s| d t d t d d |Dpt f|| d| dt dt dd |DpHt f|| d| r| jst| dsx| j| j_t| ds| j| j_| jj}|r| r| jrtd|| jfx"|D]\}}| ||qWt| jj| jj| jj}dd|D}|rd}xldd|DD]Z}|jjrJ|jjr td|nq |dkrZ|}n|jj|jjk r td|q W|dkrtd|| j||jj| j_n| | j_i}xzt| g|D]h}t|dsސq|| kr|jjsqx8|jjD],}t|t rt!| |j"j#}||t$|<qWqWt%}x| &D]}||ksdt|dst|'|j(qH|jj|jj}|jjs`x>|D]6}|j)|krt*d|j)||j+fn |,|j)qW|jj}t$|}||kr||}n`|sNd|jj-}t |t.|ddd}||kr4t*d|||j+ft| |sR| ||nd}|| jj/|<n|jj/0}x~|D]v}|j)|krr|j)| j(krr|j)|krrt01|}| |j)||j2rrx(|D]\}} || kr|||<qWqrW| jj/'|xT|jjD]H}|j)|kr6|jjsJt*d|j)||j+fn| |j)t01|qWqHWdd| jj3D| j_3| rd| _| | _4| S| 5| jj6| jj7| | S) NcSsg|]}t|tr|qSr*) isinstancer=).0br*r*r, Nsz%ModelBase.__new__..r0 __classcell__MetaabstractF_meta app_labelzfModel class %s.%s doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS. DoesNotExistcss&|]}t|dr|jjs|jVqdS)rEN)hasattrrErDrG)r?xr*r*r, ysz$ModelBase.__new__..)r4r css&|]}t|dr|jjs|jVqdS)rEN)rHrErDr )r?rIr*r*r,rJsordering get_latest_byz'%s cannot proxy the swapped model '%s'.cSsh|] }|jqSr*)r5)r?fr*r*r, sz$ModelBase.__new__..cSsg|]}t|dr|qS)rE)rH)r?Zklsr*r*r,rAszOAbstract base class containing model fields not permitted for proxy model '%s'.zAProxy model '%s' has more than one non-abstract model base class.z6Proxy model '%s' has no non-abstract model base class.zRLocal field %r in class %r clashes with field of the same name from base class %r.z%s_ptrT)Z on_deleter5 auto_created parent_linkztAuto-generated field '%s' in class %r for parent_link to base class %r clashes with declared field of the same name.cSsg|]}t|qSr*)copydeepcopy)r?idxr*r*r,rA*s)8super__new__popgetattrrZget_containing_app_config RuntimeErrorlabel add_to_classrr<tupler r rDrHrKrErLproxyswapped TypeErroritemsr local_fieldslocal_many_to_manyZprivate_fieldsfieldsconcrete_modelZ setup_proxyreversedr>rr remote_fieldmodelr#setmroupdate__dict__r5r r/add model_namerr9rQrRZ one_to_oneindexesrC_prepareZregister_modelrF)!clsr5basesattrsZ super_newr9r:Z new_attrsZ classcell new_classZ attr_metarDmeta base_metarFZ app_configZis_proxyZobj_nameobj new_fields field_namesbaseparentZ parent_linksfieldrelatedZinherited_attributesZ parent_fieldsZbase_key attr_nameZ base_parentsZ new_fieldrP) __class__r*r,rUIs4                                         zModelBase.__new__cCs2t|s"t|dr"|||n t|||dS)Ncontribute_to_class)inspectisclassrHr~setattr)ror5valuer*r*r,rZ8szModelBase.add_to_classcCs|j}|||jrXt|jdd|_t|jdd|_|jjrX|j}|jj}t t |||j dkrd|j d dd|jDf|_ tj|j}|rt|d ||jstd d|jDrtd |j t}d|_|d |x |jjD]}|js||qWtj|d dS)z7Create some methods once self._meta has been populated.T)is_nextFNz%s(%s)z, css|] }|jVqdS)N)r5)r?rMr*r*r,rJTsz%ModelBase._prepare..Zget_absolute_urlcss|]}|jdkVqdS)objectsN)r5)r?rMr*r*r,rJ[szOModel %s must specify a custom Manager, because it has a field named 'objects'.r)sender)rErnorder_with_respect_tor_get_next_or_previous_in_orderZget_next_in_orderZget_previous_in_orderrerfrmake_foreign_order_accessors__doc__r/joinrbrZABSOLUTE_URL_OVERRIDESgetZ label_lowerrmanagersany ValueErrorrrOrZrmr5Zset_name_with_modelrsend)rooptsZwrtremoteZget_absolute_url_overridemanagerindexr*r*r,rn?s4   "   zModelBase._preparecCs|jjS)N)rEZ base_manager)ror*r*r, _base_managermszModelBase._base_managercCs|jjS)N)rEZdefault_manager)ror*r*r,_default_managerqszModelBase._default_manager) r/r0r1rrUrZrnpropertyrrrBr*r*)r}r,r=Gs p. r=c@seZdZdddZdS)ModelStateFieldsCacheDescriptorNcCs|dkr |Si}|_|S)N) fields_cache)r+instanceroresr*r*r,__get__ws z'ModelStateFieldsCacheDescriptor.__get__)N)r/r0r1rr*r*r*r,rvsrc@seZdZdZdZdZeZdS) ModelStatezStore model instance state.NT)r/r0r1rdbaddingrrr*r*r*r,r~srcs eZdZfddZeddZddZddZd d Zd d Z d dZ ddZ ddZ dfddZ ddZee eZddZdgddZddZdhdd Zd!e_did"d#Zd!e_d$d%Zdjd&d'Zd(d)Zd*d+Zdkd,d-Zd!e_d.d/Zd0d1Zd2d3Zd4d5Zd6d7Z dld8d9Z!dmd:d;Z"dd?Z$d@dAZ%dBdCZ&dndDdEZ'dodFdGZ(edHdIZ)edJdKZ*edLdMZ+edNdOZ,edPdQZ-edRdSZ.edTdUZ/edVdWZ0edXdYZ1edZd[Z2ed\d]Z3ed^d_Z4ed`daZ5edbdcZ6edddeZ7Z8S)pModelc s|j}|j}t}t}tj|||dt|_t|t|j krFt d|st |j }xxt ||D] \}} ||krrq`||| j |q`WnHt |j}x| | ks$|| rH|| |k rB||| || || =Wnttfk rdYnXqWx|D]}td|qrWtt j||ddS)N)rr3kwargsz'Number of args exceeds number of fieldsFTz5'%s' is an invalid keyword argument for this function)rr)!r}rErDEFERREDr!rr_statelenconcrete_fields IndexErroriterzipattnamerbrVr5columnr>rerKeyErrorZ get_defaultnullZ_property_namesr[ get_fieldAttributeErrorrr^rT__init__r)r+r3rrorZ_setattrZ _DEFERREDZ fields_itervalrzZis_related_objectZrel_objZproperty_namespropkwarg)r}r*r,rsx        zModel.__init__csPt|t|jjkr4t|fdd|jjD}||}d|j_||j_|S)Ncs"g|]}|jkrtntqSr*)rnextr)r?rM)rw values_iterr*r,rAsz!Model.from_db..F)rrErrrrr)rorrwvaluesnewr*)rwrr,from_dbs  z Model.from_dbcCsd|jj|fS)Nz<%s: %s>)r}r/)r+r*r*r,r-szModel.__repr__cCsd|jj|jfS)Nz%s object (%s))r}r/pk)r+r*r*r,r.sz Model.__str__cCsBt|tsdS|jj|jjkr"dS|j}|dkr8||kS||jkS)NF)r>rrErcr)r+otherZmy_pkr*r*r,__eq__s z Model.__eq__cCs|jdkrtdt|jS)Nz8Model instances without primary key value are unhashable)rr^hash)r+r*r*r,__hash__s zModel.__hash__cCs.|}t|t<|jj|jjf}t|f|fS)N) __getstate__r(rrErF object_namemodel_unpickle)r+dataZclass_idr*r*r,r6s zModel.__reduce__cCs|jS)z0Hook to allow choosing the attributes to pickle.)rj)r+r*r*r,rszModel.__getstate__cCsVd}|t}|r.t}||kr2d||f}nd}|rFtj|tdd|j|dS)NzQPickled model instance's Django version %s does not match the current version %s.z9Pickled model instance's Django version is not specified.) stacklevel)rrr(warningswarnRuntimeWarningrjri)r+statemsgZpickled_versionZcurrent_versionr*r*r,r7s  zModel.__setstate__NcCs|s |j}t||jjS)N)rErWrr)r+rsr*r*r, _get_pk_val1szModel._get_pk_valcCst||jjj|S)N)rrErr)r+rr*r*r, _set_pk_val6szModel._set_pk_valcsfddjjDS)zU Return a set containing names of deferred fields for this instance. csh|]}|jjkr|jqSr*)rrj)r?rM)r+r*r,rN?sz,Model.get_deferred_fields..)rEr)r+r*)r+r,get_deferred_fields;s zModel.get_deferred_fieldsc s|dk r6t|dkrdStdd|Dr6tdt|dk rB|n|jj}|jj|j |j d}| |dk rt |}|j |}n$rfdd|jjD}|j |}|}| }x|jjD]}|j|krqt||jt||j|jr||r||}t||j} |dkrdn t||jj} | | ksF| dkr| dkr||qWx(|jjD]}||r^||q^W|jj|j_dS) aU Reload field values from the database. By default, the reloading happens from the database this instance was loaded from, or by the read router if this instance wasn't loaded from any database. The using parameter will override the default. Fields can be used to specify which fields to reload. The fields should be an iterable of field attnames. If fields is None, then all non-deferred fields are reloaded. When accessing deferred fields of an instance, the deferred loading of the field will call this method. Nrcss|]}t|kVqdS)N)r)r?rMr*r*r,rJVsz(Model.refresh_from_db..zRFound "%s" in fields argument. Relations and transforms are not allowed in fields.)rcsg|]}|jkr|jqSr*)r)r?rM)deferred_fieldsr*r,rAdsz)Model.refresh_from_db..)rrrrrrr}rusingfilterrrlistonlyrErrrrrW is_relation is_cachedZget_cached_valueZ target_fielddelete_cached_valuerelated_objects) r+rrbrZdb_instance_qsZ db_instanceZnon_loaded_fieldsrzZ rel_instanceZ local_valZ related_valr*)rr,refresh_from_dbDs@       zModel.refresh_from_dbcCs8y|j|}Wntk r*t||SXt||jS)a Return the value of the field name for this instance. If the field is a foreign key, return the id value instead of the object. If there's no Field object with this name on the model, return the model attribute's value. Used to serialize a field's value (in the serializer, or form output, for example). Normally, you would just access the attribute directly and not use this method. )rErrrWr)r+ field_namerzr*r*r,serializable_value~s  zModel.serializable_valueFc Csx^|jjD]R}|jr ||r t||jd}|r |jdkr |jjsN|j |t d|jq W|prt j |j |d}|r|s|rt d|}|dk rt|dkrdSt|}t}x:|jjD].}|js||j|j|jkr||jqW||} | rt dd| nl|s|r||jjkrt}x2|jjD]&}|jsBt|dsB||jqBW||} | rt| }|j||||d dS) aa Save the current instance. Override this in a subclass if you want to control the saving process. The 'force_insert' and 'force_update' parameters can be used to insist that the "save" must be an SQL insert or update (or equivalent for non-SQL backends), respectively. Normally, they should not be set. NzJsave() prohibited to prevent data loss due to unsaved related object '%s'.)rz6Cannot force both insert and updating in model saving.rzEThe following fields do not exist in this model or are m2m fields: %sz, through)r force_insert force_update update_fields)rErrrrWr5rremultiplerrr db_for_writer}rr frozensetrgrb primary_keyrkr differencerrrrH save_base) r+rrrrrzrurrwZnon_model_fieldsZ loaded_fieldsr*r*r,savesJ         z Model.saveTc Cs|ptj|j|d}|r$|s |r$t|dks.cs$g|]}|jks|jkr|qSr*)r5r)r?rM)rr*r,rA%sNz5Cannot force an update in save() with no primary key.Fcs.g|]&}|drt|jn |dfqS)NF)rWrr")r?rM)rr+r*r,rA3sz&Forced update did not affect any rows.z0Save with update_fields did not affect any rows.csg|]}|jk r|qSr*) auto_field)r?rM)rsr*r,rAGs)rEZlocal_concrete_fieldsrrZget_pk_value_on_saverrrrr _do_updaterrget_filter_kwargs_for_objectrcount_orderr _do_insert)r+rrorrrrZnon_pkspk_valZpk_setrbase_qsr forced_updaterz filter_argsZ order_valuerb update_pkresultr*)rsrr+rr,rsJ      zModel._save_tablecCs\|j|d}|s |dk p|S|jjrN|sN|rJ||dkpH|SdS||dkS)z Try to update the model. Return True if the model was updated (if an update query was done and a matching row was found in the DB). )rNrF)rexistsrEZselect_on_save_update)r+rrrrrrfilteredr*r*r,rOs  zModel._do_updatecCs|j|g||||dS)zx Do an INSERT. If update_pk is defined then this method should return the new pk for the model. )rbZ return_idrr)Z_insert)r+rrrbrrr*r*r,rjs zModel._do_insertcCsZ|ptj|j|d}|jdk s8td|jj|jjjft|d}|j |g|d| S)N)rzC%s object can't be deleted because its %s attribute is set to None.)r) keep_parents) rrr}rrrErrrZcollectdelete)r+rrZ collectorr*r*r,rrs  z Model.deletecCs&t||j}tt|j||ddS)NT)Z strings_only)rWrr$dictZ flatchoicesr)r+rzrr*r*r,_get_FIELD_displays zModel._get_FIELD_displayc Ks|jstd|rdnd}|r"dnd}t||j}tfd|j|f|i}|tf|j|d||jiB}|jj|j j j f| | d||jfd |}y|d St k r|d |jjjYnXdS) Nz8get_next/get_previous cannot be used on unsaved objects.gtlt-z%s__%szpk__%sz%s%sz%spkrz!%s matching query does not exist.)rrrWrrr5r}rrrrrorder_byrrGrEr) r+rzrroporderparamqqsr*r*r,_get_next_or_previous_by_FIELDs    z$Model._get_next_or_previous_by_FIELDcCsd|}t||s|rdnd}|r&dnd}|jj}||}|jjjf|jfd||jjdjf|jjj |jii |dd }t |||t ||S)Nz__%s_order_cacherrrz-_orderz _order__%s)rHrErrr}rrrrr5rrrrW)r+rZ cachenamerrZ order_fieldrrur*r*r,rs     z$Model._get_next_or_previous_in_ordercCs(|jdkrtd|t||jjS)Nz9Unsaved model instance %r cannot be used in an ORM query.)rrrWreZget_related_fieldr)r+rzr*r*r,prepare_database_saves  zModel.prepare_database_savecCsdS)aI Hook for doing any extra model-wide validation after clean() has been called on every field by self.clean_fields. Any ValidationError raised by this method will not be associated with a particular field; it will have a special-case association with the field defined by NON_FIELD_ERRORS. Nr*)r+r*r*r,cleansz Model.cleancCs\|j|d\}}||}||}x&|D]\}}||g|q.W|rXt|dS)zh Check unique constraints on the model and raise ValidationError if any failed. )excludeN)_get_unique_checks_perform_unique_checks_perform_date_checksr_ setdefaultextendr )r+r  unique_checks date_checkserrorsZ date_errorskvr*r*r,validate_uniques  zModel.validate_uniquec Cs|dkr g}g}|j|jjfg}x,|jD]}|jjr,|||jjfq,WxH|D]@\}}x6|D].}x(|D]}||krlPqlW||t|fqbWqTWg} |j|jjfg} x$|jD]}| ||jjfqWx| D]\}} x| D]} | j}||krq| jr|||ff| j r:| j |kr:| |d|| j f| j rb| j |krb| |d|| j f| j r| j |kr| |d|| j fqWqW|| fS)a{ Return a list of checks to perform. Since validate_unique() could be called from a ModelForm, some fields may have been excluded; we can't perform a unique check on a model that is missing fields involved in that check. Fields that did not validate should also be excluded, but they need to be passed in via the exclude argument. Ndateyearmonth) r}rEunique_togetherget_parent_listappendr[r`r5uniqueunique_for_dateZunique_for_yearZunique_for_month) r+r rZunique_togethersZ parent_class model_classrcheckr5rZfields_with_classrbrMr*r*r,r s>   zModel._get_unique_checksc Csi}x|D]\}}i}xZ|D]R}|j|}t||j}|dks|dkrRtjjrRq|jrb|jj sbq||t |<qWt |t |krq |j j f|} ||j} |jj s| dk r| j| d} | r t |dkr|d} nt} || g|||q W|S)Nr)rrr)rErrWrrfeaturesZ!interprets_empty_strings_as_nullsrrrstrrrrrr rrrrunique_error_message) r+rrr unique_check lookup_kwargsrrMZ lookup_valuerZmodel_class_pkkeyr*r*r,r s0       zModel._perform_unique_checksc Csi}x|D]\}}}}i}t||}|dkr.q |dkrb|j|d|<|j|d|<|j|d|<nt|||d||f<t||||<|jjf|} |jjs|jdk r| j |jd} | r | |g | |||q W|S)Nrz%s__dayz %s__monthz%s__yearz%s__%s)r)rWdayrrrrrrrr rrrdate_error_message) r+rrr lookup_typerz unique_forr%rrr*r*r,r s&  zModel._perform_date_checksc CsL|j}||}t|jdd|t|j||t|j|t||jddS)Nr)rfrlr)rz field_labelZ date_fieldZdate_field_label)messagecodeparams)rErr error_messagesr% verbose_name)r+r)rr*rrzr*r*r,r(=s zModel.date_error_messagecs|j||tj|d}t|dkrV|d}t|j|d<t|jdd|dSfdd|D}t|td |d <ttd d |dSdS) N)rfrrlr$rrr+r)r,r-r.csg|]}t|jqSr*)r%rr0)r?rM)rr*r,rAdsz.Model.unique_error_message..and field_labelsz9%(model_name)s with this %(field_labels)s already exists.r) rEr%r0rrr r/r&_)r+rr$r.rzr2r*)rr,r#Ns$ zModel.unique_error_messagec Csi}|dkrg}nt|}y|j|dWn,tk rV}z||}Wdd}~XYnXy |Wn,tk r}z||}Wdd}~XYnX|rx&|D]}|tkr||kr||qWy|j|dWn,tk r}z||}Wdd}~XYnX|r t|dS)z Call clean_fields(), clean(), and validate_unique() on the model. Raise a ValidationError for any errors that occur. N)r )r clean_fieldsr Zupdate_error_dictr rrr)r+r rrer5r*r*r, full_cleanls,  zModel.full_cleanc Cs|dkr g}i}x|jjD]x}|j|kr*qt||j}|jrH||jkrHqyt||j|||Wqt k r}z|j ||j<Wdd}~XYqXqW|rt |dS)z Clean all fields and raise a ValidationError containing a dict of all validation errors if any occur. N) rErbr5rWrZblankZ empty_valuesrr r Z error_list)r+r rrMZ raw_valuer5r*r*r,r4s  "zModel.clean_fieldscKsg}||||||jf||jjs||jf|||||| | | }|||s|| || |||||S)N)r_check_swappable _check_model_check_managersrEr] _check_fields$_check_m2m_through_same_relationship_check_long_column_names_check_id_field_check_field_name_clashes#_check_model_name_db_lookup_clashes_check_column_name_clashes_check_index_together_check_unique_together_check_ordering)rorrZ clash_errorsr*r*r,r s"  z Model.checkc Csg}|jjryt|jjWnvtk rN|tjd|jjddYnHt k r|jj d\}}|tjd|jj||fddYnX|S)z"Check if the swapped model exists.z-'%s' is not of the form 'app_label.app_name'.z models.E001)id.zF'%s' references '%s.%s', which has not been installed, or is abstract.z models.E002) rEr]r get_modelrrrErrorZ swappable LookupErrorsplit)rorrFrlr*r*r,r7s" zModel._check_swappablecCs:g}|jjr6|jjs|jjr6|tjd|jdd|S)Nz'Proxy model '%s' contains model fields.z models.E017)rD)rEr\r`rarrrGr/)rorr*r*r,r8s zModel._check_modelcKs,g}x"|jjD]}||jf|qW|S)zPerform all manager checks.)rErrr )rorrrr*r*r,r9szModel._check_managerscKsXg}x"|jjD]}||jf|qWx*|jjD]}||jfd|i|q2W|S)zPerform all field checks.Z from_model)rEr`rr ra)rorrrzr*r*r,r:s zModel._check_fieldscCsg}g}|jj}dd|D}dd|D}xT|D]L}|jj||jjf}||krt|tjd|jjjj|ddq2||q2W|S)zL Check if no relationship model is used by more than one m2m field. css |]}t|jjtr|VqdS)N)r>rerfr=)r?rMr*r*r,rJsz=Model._check_m2m_through_same_relationship..css |]}t|jjtr|VqdS)N)r>rerr=)r?rMr*r*r,rJ szMThe model has two many-to-many relations through the intermediate model '%s'.z models.E003)rurD) rErarerfrrrrGrY)rorZseen_intermediary_signaturesrbrM signaturer*r*r,r;s    z*Model._check_m2m_through_same_relationshipcsLfddjjD}|rD|djsDjjjdkrDtjdddgSgSdS) z%Check if `id` field is a primary key.cs&g|]}|jdkr|jjkr|qS)rD)r5rEr)r?rM)ror*r,rAsz)Model._check_id_field..rrDzP'id' can only be used as a field name if the field also sets 'primary_key=True'.z models.E004)rurDN)rEr`rrr5rrG)rorbr*)ror,r=s zModel._check_id_fieldc Cslg}i}x|jD]x}xr|jjD]f}||jp@||jp@d}|rt|tjd|j|j j|j|j jf|dd|||j<|||j<q"WqWx8|jD]*}x$|j D]}||kr|||j<qWqWx|jjD]}||jp||jpd}|jdko|o|jdko|j |k}|rP|sP|tjd|j|j|j jf|dd|||j<|||j<qW|S)z2Forbid field shadowing in multi-table inheritance.NzYThe field '%s' from parent model '%s' clashes with the field '%s' from parent model '%s'.z models.E005)rurDrDz;The field '%s' clashes with the field '%s' from model '%s'.z models.E006) rErr`rr5rrrrGrfZ get_fields)rorZ used_fieldsryrMZclashZ id_conflictr*r*r,r>-s@   (   zModel._check_field_name_clashesc Csdg}g}xV|jjD]J}|\}}|rR||krR|tjd|j|fd|ddq||qW|S)Nz>Field '%s' has column name '%s' that is used by another field.z$Specify a 'db_column' for the field.z models.E007)hintrurD)rEr`get_attname_columnrrrGr5)roZused_column_namesrrMr3 column_namer*r*r,r@fs    z Model._check_column_name_clashescCs`g}|j}|ds|dr:|tjd||ddn"t|kr\|tjd||dd|S)Nr3zgThe model name '%s' cannot start or end with an underscore as it collides with the query lookup syntax.z models.E023)rurDzbThe model name '%s' cannot contain double underscores as it collides with the query lookup syntax.z models.E024)r/ startswithendswithrrrGr)rorrlr*r*r,r?s"  z)Model._check_model_name_db_lookup_clashescCs|t|jjttfs$tjd|ddgStdd|jjDrLtjd|ddgSg}x"|jjD]}|| |dqZW|Sd S) z+Check the value of "index_together" option.z)'index_together' must be a list or tuple.z models.E008)rurDcss|]}t|ttf VqdS)N)r>r[r)r?rbr*r*r,rJsz.Model._check_index_together..z6All 'index_together' elements must be lists or tuples.z models.E009index_togetherN) r>rErPr[rrrGrr_check_local_fields)rorrbr*r*r,rAs  zModel._check_index_togethercCs|t|jjttfs$tjd|ddgStdd|jjDrLtjd|ddgSg}x"|jjD]}|| |dqZW|Sd S) z,Check the value of "unique_together" option.z*'unique_together' must be a list or tuple.z models.E010)rurDcss|]}t|ttf VqdS)N)r>r[r)r?rbr*r*r,rJsz/Model._check_unique_together..z7All 'unique_together' elements must be lists or tuples.z models.E011rN) r>rErr[rrrGrrrQ)rorrbr*r*r,rBs  zModel._check_unique_togetherc Csddlm}dd|jjddD}g}x|D]}y ||}Wn2tk rp|tjd||f|dd Yq.Xt|j |j r|tjd |||f|d d q.||jj kr.|tjd |||jj fd |ddq.W|S)Nr)modelscSsi|] }||jqSr*)r5)r?rzr*r*r, sz-Model._check_local_fields..F)reversez*'%s' refers to the nonexistent field '%s'.z models.E012)rurDzV'%s' refers to a ManyToManyField '%s', but ManyToManyFields are not permitted in '%s'.z models.E013z;'%s' refers to field '%s' which is not local to model '%s'.z4This issue may be caused by multi-table inheritance.z models.E016)rKrurD) django.dbrRrEZ _get_fieldsrrrrGr>reZ ManyToManyRelr`r)rorboptionrRZforward_fields_maprrrzr*r*r,rQs<      zModel._check_local_fieldscCs|jjrtjd|ddgS|jjs*|jjs.gSt|jjttfsRtjd|ddgSg}|jj}dd|D}dd|D}d d|D}d d |D}g}|j}t t d dt |j |j D}|||x&|D]}|tjd ||ddqW|S)ze Check "ordering" option -- is it a list of strings and do all fields exist? z?'ordering' and 'order_with_respect_to' cannot be used together.z models.E021)rurDzQ'ordering' must be a tuple or list (even if you want to order by only one field).z models.E014css$|]}t|tr|dkr|VqdS)?N)r>r")r?rMr*r*r,rJsz(Model._check_ordering..css(|] }|dr|ddn|VqdS)rrN)rN)r?rMr*r*r,rJscss|]}t|kr|VqdS)N)r)r?rMr*r*r,rJ#scSsh|]}|dkr|qS)rr*)r?rMr*r*r,rN'sz(Model._check_ordering..css2|]*}|jr|jr|j|jfn |jfVqdS)N)rOZconcreter5rrzZrelated_query_name)r?rMr*r*r,rJ0sz0'ordering' refers to the nonexistent field '%s'.z models.E015)rEZ_ordering_clashrrGrrKr>rr[rgr from_iterablerbrrr)rorrbZinvalid_fieldsrZ valid_fieldsZ invalid_fieldr*r*r,rCs>   zModel._check_orderingc Cslg}d}d}xdtjD]Z}t||s&qt|}|j}|dks|jjrLqq|dkr^|}|}q||kr|}|}qW|dkr~|Sx\|j j D]P}| \}} |j dkr| dk rt | |kr|tjd| ||fd|ddqWx|j jD]~}t|jjtrqxh|jjj j D]X} | \}} | j dkr| dk rt | |kr|tjd| ||fd|ddqWqW|S) z Check that any auto-generated column names are shorter than the limits for each database in which the model will be created. Nz\Autogenerated column name too long for field "%s". Maximum length is "%s" for database "%s".z/Set the column name manually using 'db_column'.z models.E018)rKrurDz`Autogenerated column name too long for M2M field "%s". Maximum length is "%s" for database "%s".z\Use 'through' to create a separate model for M2M and then set column_name using 'db_column'.z models.E019)rZ DATABASESrZallow_migrate_modelropsmax_name_lengthr!Ztruncates_namesrEr`rLZ db_columnrrrrGrar>rerr") rorZ allowed_lenZdb_aliasrrrZrMr3rMZm2mZrel_namer*r*r,r<@sT      $ zModel._check_long_column_names)N)NN)FFNN)FFFNN)FNFFNN)NF)N)N)NT)N)9r/r0r1r classmethodrr-r.rrr6rr7rrrrrrrrZ alters_datarrrrrrrrrr r rr r rr(r#r6r4r r7r8r9r:r;r=r>r@r?rArBrQrCr<rBr*r*)r}r,rsp h     : J ' 3   3- $       9     0 Cr) metaclassc Csp|dkr t}|jj}||}tj|dd:x2t|D]&\}}|jjfd|i|j |dq8WWdQRXdS)NF)rrr)r) r rErget_forward_related_filterrr enumeraterrri)r+ ordered_objZid_listr order_wrtrijr*r*r,method_set_orders rccCs4|jj}||}|jjj}|jjf|j|ddS)NT)Zflat)rErr]rr5rrZ values_list)r+r_r`rZpk_namer*r*r,method_get_orders  rdcCs<t|d|jtt|t|d|jtt|dS)Nz get_%s_orderz set_%s_order)rr/lowerrrdrc)rfZ related_modelr*r*r,rs   rcCs$t|trtj|}n|}||S)z7Used to unpickle Model subclasses with deferred fields.)r>r[rrFrU)Zmodel_idrfr*r*r,rs  rTcCst||}||S)N)rWrU)klassZexception_name exceptionr*r*r,r2s r2)N)N)LrQrr functoolsr itertoolsrZ django.appsrZ django.confrZ django.corerZdjango.core.exceptionsrrr r r r rUr rrrrrrZdjango.db.models.constantsrZdjango.db.models.deletionrrZdjango.db.models.fields.relatedrrrrZdjango.db.models.managerrZdjango.db.models.optionsrZdjango.db.models.queryrZdjango.db.models.signalsrrr r!r"Zdjango.db.models.utilsr#Zdjango.utils.encodingr$Zdjango.utils.textr%r&Zdjango.utils.translationr'r3Zdjango.utils.versionr(r)rr<r8r=rrrrcrdrrZ__safe_for_unpickle__r2r*r*r*r,s\      $         1