î ªÍX-&ã@s dZddlmZddlZddlmZddlmZddlm Z ddl m Z edd ƒZ Gd d „d e ƒZGd d „d eƒZGdd„de jƒZGdd„deƒZGdd„deƒZddd„Zdd„Zdd„ZdS)zî Various data structures used in query construction. Factored out from django.db.models.query to avoid making the main module very large and/or so that they can be used by other modules without getting into circular import difficulties. é)Úunicode_literalsN)Ú namedtuple)ÚFieldDoesNotExist)Ú LOOKUP_SEP)ÚtreeÚPathInfoz5from_opts to_opts target_fields join_field m2m directc@seZdZdZdS)Ú InvalidQueryzE The query passed to raw isn't a safe query to use with raw. N)Ú__name__Ú __module__Ú __qualname__Ú__doc__©r r úJ/home/ubuntu/projects/ifolica/build/django/django/db/models/query_utils.pyrs rc@s:eZdZdZdZdd„Zdddd„ZdS)Ú QueryWrapperz¢ A type that indicates the contents are an SQL fragment and the associate parameters. Can be used to pass opaque data to a where-clause, for example. 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N)rKrG)rArWrKr r rÚ_unregister_lookup±s  z&RegisterLookupMixin._unregister_lookup) r r r rMrRrVÚ classmethodrXrYr r r rrF†s   rFFcCsÐ|js dS|jjr$| r$dS|rc|rF|jƒ|krFdS| rc|j|krcdSn| rw|jrwdS|rÌ|j|krÌ|rÉ|j|krÉtd|jjj |jfƒ‚qÉqÌndS)av Returns True if this field should be used to descend deeper for select_related() purposes. Used by both the query construction code (sql.query.fill_related_selections()) and the model instance creation code (query.get_klass_info()). Arguments: * field - the field to be checked * restricted - a boolean field, indicating if the field list has been manually restricted using a requested clause) * requested - The select_related() dictionary. * load_fields - the set of fields to be loaded on this model * reverse - boolean, True if we are checking a reverse select related FzXField %s.%s cannot be both deferred and traversed using select_related at the same time.T) Z remote_fieldZ parent_linkZrelated_query_namer=Únullr4rr3r9Z object_name)ÚfieldZ restrictedÚ requestedZ load_fieldsÚreverser r rÚselect_related_descend¼s" %r_cCsrxett|ƒdƒD]M}tj|d|…ƒ}||kr||r||||d…fSqWdffS)zó A helper method to check if the lookup_parts contains references to the given annotations set. Because the LOOKUP_SEP is contained in the default annotation names we must check each prefix of the lookup_parts for a match. érNF)ÚrangeÚlenrÚjoin)Z lookup_partsZ annotationsÚnZlevel_n_lookupr r rÚrefs_expressionàs recs@‡fdd†}||ƒp?t|ddƒo?||jjƒS)zÞ Check that self.model is compatible with target_opts. Compatibility is OK if: 1) model and opts match (where proxy inheritance is removed) 2) model is parent of opts' model or the other way around cs=ˆjj|jkp<|jˆjjƒkp<ˆ|jƒkS)N)r9Zconcrete_modelZget_parent_list)rB)r3r rÚcheckõsz-check_rel_lookup_compatibility..checkrEF)r?r3r9)r3Z target_optsr\rfr )r3rÚcheck_rel_lookup_compatibilityîs rg)r Ú __future__rrIÚ collectionsrZdjango.core.exceptionsrZdjango.db.models.constantsrZ django.utilsrrÚ ExceptionrÚobjectrÚNoderr1rFr_rergr r r rÚs *06$