X@sdZddlmZddlmZGdddeZGdddeZGdd d eZ Gd d d e Z Gd d d e Z Gdddej ZGddde ZddZdS)z; Module for abstract serializer/unserializer base classes. )models)sixc@seZdZdZdS)SerializerDoesNotExistz'The requested serializer was not found.N)__name__ __module__ __qualname____doc__r r J/home/ubuntu/projects/ifolica/build/django/django/core/serializers/base.pyrs rc@seZdZdZdS)SerializationErrorz,Something bad happened during serialization.N)rrrrr r r r r s r c@s(eZdZdZeddZdS)DeserializationErrorz.Something bad happened during deserialization.cCs|d||||fS)zs Factory method for creating a deserialization error which has a more explanatory message. z#%s: (%s:pk=%s) field_value was '%s'r )clsZ original_excmodelZfkZ field_valuer r r WithDataszDeserializationError.WithDataN)rrrr classmethodrr r r r r s r c@s.eZdZdZddZddZdS) ProgressBarKcCs||_||_d|_dS)Nr)output total_count prev_done)selfrrr r r __init__!s  zProgressBar.__init__cCs|js dS|d|j}||jd}|j|krBdS||_|jdkr`dnd}|jj|dd|d|j|d||jkr|jjd n|jjdS) Nd [. ] )rrprogress_widthrwriteflush)rcountpercdonecrr r r update&s  /zProgressBar.updateN)rrrr!rr(r r r r rs  rc@seZdZdZdZeZddZddZddZ d d Z d d Z d dZ ddZ ddZddZdS) Serializerz) Abstract serializer base class. FcKs||_|jdtj|_|jdd|_|jdd|_|jdd|_|j|jdd|jdd }|j d |_ xft |d d D]R\}}|j ||j j}x|j jD]}|jr|jdkr:|jdks$|j|jkrx|j||qxq{|jdkse|jdd|jkr{|j||q{qqWxT|j jD]F}|jr|jdks|j|jkr|j||qqqW|j||j||j rd|_ qqW|j|jS)z' Serialize a queryset. streamfieldsNuse_natural_foreign_keysFuse_natural_primary_keysZprogress_outputZ object_countrTstartr)optionspoprStringIOr*Zselected_fieldsr,r-progress_classstart_serializationfirst enumerate start_object_metaconcrete_modelZ local_fields serializeZ remote_fieldZattname handle_fieldhandle_fk_fieldZ many_to_manyhandle_m2m_field end_objectr(end_serializationgetvalue)rZquerysetr1Z progress_barr$objr:fieldr r r r;?s: $     !+ !    zSerializer.serializecCstddS)zA Called when serializing of the queryset starts. zDsubclasses of Serializer must provide a start_serialization() methodN)NotImplementedError)rr r r r5gszSerializer.start_serializationcCsdS)z? Called when serializing of the queryset ends. Nr )rr r r r@mszSerializer.end_serializationcCstddS)z> Called when serializing of an object starts. z=subclasses of Serializer must provide a start_object() methodN)rD)rrBr r r r8sszSerializer.start_objectcCsdS)z< Called when serializing of an object ends. Nr )rrBr r r r?yszSerializer.end_objectcCstddS)zW Called to handle each individual (non-relational) field on an object. z>subclasses of Serializer must provide an handle_field() methodN)rD)rrBrCr r r r<szSerializer.handle_fieldcCstddS)z6 Called to handle a ForeignKey field. zAsubclasses of Serializer must provide an handle_fk_field() methodN)rD)rrBrCr r r r=szSerializer.handle_fk_fieldcCstddS)z5 Called to handle a ManyToManyField. zBsubclasses of Serializer must provide an handle_m2m_field() methodN)rD)rrBrCr r r r>szSerializer.handle_m2m_fieldcCs,tt|jddr(|jjSdS)zn Return the fully serialized queryset (or None if the output stream is not seekable). rAN)callablegetattrr*rA)rr r r rAszSerializer.getvalueN)rrrrZinternal_use_onlyrr4r;r5r@r8r?r<r=r>rAr r r r r)5s  (       r)c@s:eZdZdZddZddZddZdS) Deserializerz+ Abstract base deserializer class. cKs=||_t|tjr0tj||_n ||_dS)zA Init this serializer given a stream or a string N)r1 isinstancer string_typesr3r*)rZstream_or_stringr1r r r rs zDeserializer.__init__cCs|S)Nr )rr r r __iter__szDeserializer.__iter__cCstddS)z8Iteration iterface -- return the next item in the streamz;subclasses of Deserializer must provide a __next__() methodN)rD)rr r r __next__szDeserializer.__next__N)rrrrrrJrKr r r r rGs  rGc@sCeZdZdZdddZddZdddd ZdS) DeserializedObjectae A deserialized model. Basically a container for holding the pre-saved deserialized data along with the many-to-many data saved with the object. Call ``save()`` to save the object (with the many-to-many data) to the database; call ``save(save_m2m=False)`` to save just the object fields (and not touch the many-to-many stuff.) NcCs||_||_dS)N)objectm2m_data)rrBrNr r r rs zDeserializedObject.__init__cCsd|jjj|jjfS)Nz)rMr9labelpk)rr r r __repr__szDeserializedObject.__repr__TcKsztjj|jd|dd||jrm|rmx9|jjD]%\}}t|j|j|qAWnd|_dS)NusingrawT)rModelZ save_baserMrNitemsrFset)rZsave_m2mrRkwargsZ accessor_nameZ object_listr r r saves " zDeserializedObject.save)rrrrrrQrXr r r r rLs  rLc Cs||}|jdkrt|drt|jdr|j}y%|jj|j|j|_Wq|jk rYqXn|S)z Build a model instance. If the model instance doesn't have a primary key and the model supports natural keys, try to retrieve it from the database. N natural_keyget_by_natural_key)rPhasattrZ_default_managerrYZ db_managerrZZ DoesNotExist)rTdatadbrBrYr r r build_instances  %r^N)rZ django.dbrZ django.utilsrKeyErrorr Exceptionr r rMrr)IteratorrGrLr^r r r r s e"