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Commenting & bufixing in datahandlers & queries
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Yann
parent
38fda3ce43
commit
20c1627bda
7 changed files with 185 additions and 107 deletions
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@ -1,2 +1,62 @@
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from lodel.leapi.datahandlers.base_classes import DataHandler
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DataHandler.load_base_handlers()
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##@defgroup lodel2_datahandlers Datahandlers
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#@ingroup lodel2_leapi
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#@ingroup lodel2_em
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##@defgroup lodel2_dh_checks Datahandlers datas checking
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#@ingroup lodel2_datahandlers
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##@package lodel.leapi.datahandlers Lodel2 datahandlers
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#
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#Datahandlers are object that handles datas check, construction and
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#consistency check
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#
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##@page lodel2_dh_checks_page Datahandlers datas checking
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#@ingroup lodel2_dh_checks
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#
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#@section lodel2_dh_check_mech Datas checking mechanism
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#
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#The data checking mechanism is divided into 3 stages :
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# 1. **value checking** : a basic value check. Example : is len(value) < 52
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# 2. **data construction** : for datas that needs to be modified. Example :
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#a date that will be transformed into a Datetime object associated with
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#a timezone
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# 3. **data consistency checking** : perform a consistency checking on the
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#object from the "point of view" of the current field. Example : is the given
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#lodel_id an identifier of a Article
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#
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#@subsection lodel2_dh_check_impl Implementation
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#
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#Those three stages are implemented by 3 datahandlers methods :
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# - @ref base_classes.DataHandler.check_data_value() "check_data_value"
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# - @ref base_classes.DataHandler.construct_data() "construct_data"
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# - @ref base_classes.DataHandler.check_data_value() "check_data_consitency"
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#
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#@note To ensure the calls of the base classes methods child classes implements
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#those method with a '_' preffix :
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# - @ref base_classes.DataHandler._check_data_value "_check_data_value()"
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# - @ref base_classes.DataHandler._construct_data() "_construct_data"
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# - @ref base_classes.DataHandler._check_data_value() "_check_data_consitency"
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#
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#Examples of child classes can be found @ref datahandlers.datas "here"
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#
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#@subsubsection lodel2_dh_datas_construction Datas construction
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#
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#Datas construction is a bit tricky. When constructing a data handled by a
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#datahandler we may need to have access to other datas in the object (see
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#@ref base_classes.DataHandler.construct_data() "construct_data() arguments").
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#
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#The problem reside in the construction order, if we need other datas we have
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#to be sure that they are allready constructed. To achieve this goal the datas
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#dict given as arguement to
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#@ref base_classes.DataHandler.construct_data() "construct_data()" is an
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#@ref base_classes.DatasConstructor "DatasConstructor" instance. This class
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#check if a data is constructed when trying to access to it, if not it runs
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#the corresponding construct_data() (and have a circular dependencies detection
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#mechanism)
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#
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#@see base_classes.DatasConstructor.
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@ -16,6 +16,7 @@ class FieldValidationError(Exception):
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pass
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##@brief Base class for all data handlers
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#@ingroup lodel2_datahandlers
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class DataHandler(object):
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_HANDLERS_MODULES = ('datas_base', 'datas', 'references')
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@ -75,7 +76,10 @@ class DataHandler(object):
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return self.internal is not False
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##@brief calls the data_field defined _check_data_value() method
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# @return tuple (value, error|None)
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#@ingroup lodel2_dh_checks
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#@warning DO NOT REIMPLEMENT THIS METHOD IN A CUSTOM DATAHANDLER (see
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#@ref _construct_data() and @ref lodel2_dh_check_impl )
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#@return tuple (value, error|None)
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def check_data_value(self, value):
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if value is None:
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if not self.nullable:
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@ -83,6 +87,10 @@ class DataHandler(object):
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return None, None
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return self._check_data_value(value)
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##@brief Designed to be implemented in child classes
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def _check_data_value(self, value):
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return value, None
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##@brief checks if this class can override the given data handler
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# @param data_handler DataHandler
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@ -93,35 +101,66 @@ class DataHandler(object):
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return True
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##@brief Build field value
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# @param emcomponent EmComponent : An EmComponent child class instance
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# @param fname str : The field name
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# @param datas dict : dict storing fields values (from the component)
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# @param cur_value : the value from the current field (identified by fieldname)
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# @return the value
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# @throw RunTimeError if data construction fails
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#@ingroup lodel2_dh_checks
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#@warning DO NOT REIMPLEMENT THIS METHOD IN A CUSTOM DATAHANDLER (see
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#@ref _construct_data() and @ref lodel2_dh_check_impl )
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#@param emcomponent EmComponent : An EmComponent child class instance
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#@param fname str : The field name
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#@param datas dict : dict storing fields values (from the component)
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#@param cur_value : the value from the current field (identified by fieldname)
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#@return the value
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#@throw RunTimeError if data construction fails
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#@todo raise something else
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def construct_data(self, emcomponent, fname, datas, cur_value):
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emcomponent_fields = emcomponent.fields()
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data_handler = None
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if fname in emcomponent_fields:
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data_handler = emcomponent_fields[fname]
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new_val = cur_value
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if fname in datas.keys():
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return cur_value
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pass
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elif data_handler is not None and hasattr(data_handler, 'default'):
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return data_handler.default
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new_val = data_handler.default
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elif data_handler is not None and data_handler.nullable:
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return None
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new_val = None
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return self._construct_data(emcomponent, fname, datas, new_val)
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##@brief Designed to be reimplemented by child classes
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#@param emcomponent EmComponent : An EmComponent child class instance
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#@param fname str : The field name
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#@param datas dict : dict storing fields values (from the component)
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#@param cur_value : the value from the current field (identified by fieldname)
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#@return the value
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#@see construct_data() lodel2_dh_check_impl
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def _construct_data(self, empcomponent, fname, datas, cur_value):
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return cur_value
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##@brief Check datas consistency
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# @param emcomponent EmComponent : An EmComponent child class instance
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# @param fname : the field name
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# @param datas dict : dict storing fields values
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# @return an Exception instance if fails else True
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# @todo A implémenter
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#@ingroup lodel2_dh_checks
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#@warning DO NOT REIMPLEMENT THIS METHOD IN A CUSTOM DATAHANDLER (see
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#@ref _construct_data() and @ref lodel2_dh_check_impl )
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#@warning the datas argument looks like a dict but is not a dict
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#see @ref base_classes.DatasConstructor "DatasConstructor" and
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#@ref lodel2_dh_datas_construction "Datas construction section"
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#@param emcomponent EmComponent : An EmComponent child class instance
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#@param fname : the field name
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#@param datas dict : dict storing fields values
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#@return an Exception instance if fails else True
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#@todo A implémenter
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def check_data_consistency(self, emcomponent, fname, datas):
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return self._check_data_consistency(emcomponent, fname, datas)
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##@brief Designed to be reimplemented by child classes
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#@param emcomponent EmComponent : An EmComponent child class instance
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#@param fname : the field name
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#@param datas dict : dict storing fields values
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#@return an Exception instance if fails else True
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#@see check_data_consistency() lodel2_dh_check_impl
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def _check_data_consistency(self, emcomponent, fname, datas):
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return True
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##@brief make consistency after a query
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# @param emcomponent EmComponent : An EmComponent child class instance
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# @param fname : the field name
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@ -139,7 +178,8 @@ class DataHandler(object):
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if not issubclass(data_handler, DataHandler):
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raise ValueError("A data handler HAS TO be a child class of DataHandler")
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cls.__custom_handlers[name] = data_handler
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##@brief Load all datahandlers
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@classmethod
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def load_base_handlers(cls):
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if cls._base_handlers is None:
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@ -185,13 +225,23 @@ class DataHandler(object):
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return hash(tuple(hash_dats))
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##@brief Base class for datas data handler (by opposition with references)
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#@ingroup lodel2_datahandlers
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class DataField(DataHandler):
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pass
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##@brief Abstract class for all references
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#@ingroup lodel2_datahandlers
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#
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# References are fields that stores a reference to another
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# editorial object
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#
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#
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#@todo Check data implementation : check_data = is value an UID or an
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#LeObject child instance
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#@todo Construct data implementation : transform the data into a LeObject
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#instance
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#@todo Check data consistency implementation : check that LeObject instance
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#is from an allowed class
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class Reference(DataHandler):
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base_type="ref"
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@ -210,8 +260,6 @@ class Reference(DataHandler):
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#if not issubclass(lodel.leapi.leobject.LeObject, back_reference[0]) or not isinstance(back_reference[1], str):
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# raise TypeError("Back reference was expected to be a tuple(<class LeObject>, str) but got : (%s, %s)" % (back_reference[0], back_reference[1]))
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self.__back_reference = back_reference
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self.back_ref = back_reference
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super().__init__(internal=internal, **kwargs)
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@property
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@ -227,11 +275,15 @@ class Reference(DataHandler):
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self.__back_reference = back_reference
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##@brief Check value
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# @param value *
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# @return tuple(value, exception)
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# @todo implement the check when we have LeObject to check value
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def _check_data_value(self, value):
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return value, None
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#@param value *
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#@return tuple(value, exception)
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#@todo implement the check when we have LeObject to check value
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def check_data_value(self, value):
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print('REFERENCE check_data value')
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return super().check_data_value(value)
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if isinstance(value, lodel.editorial_model.components.EmClass):
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value = [value]
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for elt in value:
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@ -243,29 +295,36 @@ class Reference(DataHandler):
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return value
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##@brief Check datas consistency
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# @param emcomponent EmComponent : An EmComponent child class instance
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# @param fname : the field name
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# @param datas dict : dict storing fields values
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# @return an Exception instance if fails else True
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# @todo A implémenter
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#@param emcomponent EmComponent : An EmComponent child class instance
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#@param fname : the field name
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#@param datas dict : dict storing fields values
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#@return an Exception instance if fails else True
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#@todo check for performance issue and check logics
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#@todo Implements consistency checking on value : Check that the given value
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#points onto an allowed class
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#@warning composed uid capabilities broken here
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def check_data_consistency(self, emcomponent, fname, datas):
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rep = super().check_data_consistency(emcomponent, fname, datas)
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if isinstance(rep, Exception):
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return rep
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if self.back_reference is None:
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return True
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#Checking back reference consistency
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# !! Reimplement instance fetching in construct data !!
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dh = emcomponent.field(fname)
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logger.debug(dh)
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logger.info('Warning : multiple uid capabilities are broken here')
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uid = datas[emcomponent.uid_fieldname()[0]]
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target_class = self.back_ref[0]
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target_field = self.back_ref[1]
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target_uidfield = traget_class.uid_fieldname()[0]
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value = datas[emcomponent.data(fname)]
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uid = datas[emcomponent.uid_fieldname()[0]] #multi uid broken here
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target_class = self.back_reference[0]
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target_field = self.back_reference[1]
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target_uidfield = target_class.uid_fieldname()[0] #multi uid broken here
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value = datas[fname]
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obj = target_class.get((target_uidfield , '=', value))
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obj = target_class.get([(target_uidfield , '=', value)])
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if len(obj) == 0:
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logger.warning('Object referenced does not exist')
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return False
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obj.set_data(target_field, uid)
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obj.update()
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return True
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##@brief This class represent a data_handler for single reference to another object
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@ -285,6 +344,7 @@ class SingleRef(Reference):
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##@brief This class represent a data_handler for multiple references to another object
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#@ingroup lodel2_datahandlers
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#
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# The fields using this data handlers are like SingleRef but can store multiple references in one field
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# @note for the moment split on ',' chars
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@ -297,22 +357,28 @@ class MultipleRef(Reference):
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super().__init__(**kwargs)
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def _check_data_value(self, value):
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def check_data_value(self, value):
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value, expt = super().check_data_value(value)
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if expt is not None:
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#error in parent
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return value, expt
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elif value is None:
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#none value
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return value, expt
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expt = None
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if isinstance(value, str):
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value, expt = super()._check_data_value(value)
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elif not hasattr(value, '__iter__'):
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return None, FieldValidationError("MultipleRef has to be an iterable or a string")
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return None, FieldValidationError("MultipleRef has to be an iterable or a string, '%s' found" % value)
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if self.max_item is not None:
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if self.max_item < len(value):
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return None, FieldValidationError("Too many items")
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return value, expt
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def check_data_consistency(self, emcomponent, fname, datas):
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return True
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def construct_data(self, emcomponent, fname, datas, cur_value):
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cur_value = super().construct_data(emcomponent, fname, datas, cur_value)
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if cur_value == 'None' or cur_value is None or cur_value == '':
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return None
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emcomponent_fields = emcomponent.fields()
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@ -336,14 +402,14 @@ class MultipleRef(Reference):
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l_value = None
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if l_value is not None:
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if self.back_ref is not None:
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br_class = self.back_ref[0]
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if self.back_reference is not None:
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br_class = self.back_reference[0]
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for br_id in l_value:
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query_filters = list()
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query_filters.append((br_class.uid_fieldname()[0], '=', br_id))
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br_obj = br_class.get(query_filters)
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if len(br_obj) != 0:
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br_list = br_obj[0].data(self.back_ref[1])
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br_list = br_obj[0].data(self.back_reference[1])
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if br_list is None:
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br_list = list()
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if br_id not in br_list:
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@ -355,14 +421,15 @@ class MultipleRef(Reference):
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# @param emcomponent EmComponent : An EmComponent child class instance
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# @param fname : the field name
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# @param datas dict : dict storing fields values
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"""
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def make_consistency(self, emcomponent, fname, datas):
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dh = emcomponent.field(fname)
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logger.info('Warning : multiple uid capabilities are broken here')
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uid = datas[emcomponent.uid_fieldname()[0]]
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if self.back_ref is not None:
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target_class = self.back_ref[0]
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target_field = self.back_ref[1]
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if self.back_reference is not None:
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target_class = self.back_reference[0]
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target_field = self.back_reference[1]
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target_uidfield = target_class.uid_fieldname()[0]
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l_value = datas[fname]
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@ -382,8 +449,10 @@ class MultipleRef(Reference):
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l_uids_ref.append(uid)
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obj[0].set_data(target_field, l_uids_ref)
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obj[0].update()
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"""
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## @brief Class designed to handle datas access will fieldtypes are constructing datas
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#@ingroup lodel2_datahandlers
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#
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# This class is designed to allow automatic scheduling of construct_data calls.
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#
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@ -21,7 +21,7 @@ build its content'
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self._format_string = format_string
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super().__init__(internal='automatic',**kwargs)
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def construct_data(self, emcomponent, fname, datas, cur_value):
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def _construct_data(self, emcomponent, fname, datas, cur_value):
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ret = self._format_string % tuple(
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datas[fname] for fname in self._field_list)
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if len(ret) > self.max_length:
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@ -110,7 +110,7 @@ class DateTime(DataField):
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error = ValueError("Tue value has to be a string or a datetime")
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return value, error
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def construct_data(self, emcomponent, fname, datas, cur_value):
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def _construct_data(self, emcomponent, fname, datas, cur_value):
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if (self.now_on_create and cur_value is None) or self.now_on_update:
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return datetime.datetime.now()
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return cur_value
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@ -21,6 +21,7 @@ class List(MultipleRef):
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# @param value *
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# @return tuple(value, exception)
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def _check_data_value(self, value):
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print("LIST check_datavalue")
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if isinstance(value, list) or isinstance(value, str):
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val, expt = super()._check_data_value(value)
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else:
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@ -30,9 +31,6 @@ class List(MultipleRef):
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return val, expt
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def construct_data(self, emcomponent, fname, datas, cur_value):
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return super().construct_data(emcomponent, fname, datas, cur_value)
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##@brief Child class of MultipleRef where references are represented in the form of a python set
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class Set(MultipleRef):
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@ -53,9 +51,6 @@ class Set(MultipleRef):
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return None, FieldValidationError("Set or string expected for a set field")
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return val, expt
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|
||||
def construct_data(self, emcomponent, fname, datas, cur_value):
|
||||
return super().construct_data(emcomponent, fname, datas, cur_value)
|
||||
|
||||
##@brief Child class of MultipleRef where references are represented in the form of a python dict
|
||||
class Map(MultipleRef):
|
||||
|
||||
|
|
@ -77,46 +72,6 @@ class Map(MultipleRef):
|
|||
None if isinstance(expt, Exception) else value,
|
||||
expt)
|
||||
|
||||
def construct_data(self, emcomponent, fname, datas, cur_value):
|
||||
logger.info('WARNING : not well implemented...list are stored...not dict')
|
||||
if cur_value == 'None' or cur_value is None or cur_value == '':
|
||||
return None
|
||||
emcomponent_fields = emcomponent.fields()
|
||||
data_handler = None
|
||||
if fname in emcomponent_fields:
|
||||
data_handler = emcomponent_fields[fname]
|
||||
u_fname = emcomponent.uid_fieldname()
|
||||
uidtype = emcomponent.field(u_fname[0]) if isinstance(u_fname, list) else emcomponent.field(u_fname)
|
||||
|
||||
if isinstance(cur_value, str):
|
||||
value = cur_value.split(',')
|
||||
l_value = [uidtype.cast_type(uid) for uid in value]
|
||||
elif isinstance(cur_value, list):
|
||||
l_value = list()
|
||||
for value in cur_value:
|
||||
if isinstance(value,uidtype.cast_type):
|
||||
l_value.append(value)
|
||||
else:
|
||||
raise ValueError("The items must be of the same type, string or %s" % (emcomponent.__name__))
|
||||
else:
|
||||
l_value = None
|
||||
|
||||
if l_value is not None:
|
||||
if self.back_ref is not None:
|
||||
br_class = self.back_ref[0]
|
||||
for br_id in l_value:
|
||||
query_filters = list()
|
||||
query_filters.append((br_class.uid_fieldname()[0], '=', br_id))
|
||||
br_obj = br_class.get(query_filters)
|
||||
if len(br_obj) != 0:
|
||||
br_list = br_obj[0].data(self.back_ref[1])
|
||||
if br_list is None:
|
||||
br_list = list()
|
||||
if br_id not in br_list:
|
||||
br_list.append(br_id)
|
||||
logger.info('The referenced object has to be updated')
|
||||
return l_value
|
||||
|
||||
##@brief This Reference class is designed to handler hierarchy with some constraint
|
||||
class Hierarch(MultipleRef):
|
||||
|
||||
|
|
@ -137,6 +92,3 @@ class Hierarch(MultipleRef):
|
|||
else:
|
||||
return None, FieldValidationError("Set or string expected for a set field")
|
||||
return val, expt
|
||||
|
||||
def construct_data(self, emcomponent, fname, datas, cur_value):
|
||||
return super().construct_data(emcomponent, fname, datas, cur_value)
|
||||
|
|
@ -474,8 +474,6 @@ class LeInsertQuery(LeQuery):
|
|||
def _query(self, datas):
|
||||
datas = self._target_class.prepare_datas(datas, True, False)
|
||||
id_inserted = self._rw_datasource.insert(self._target_class,datas)
|
||||
# To put in a hook ??
|
||||
self._target_class.make_consistency(datas=res_datas)
|
||||
return id_inserted
|
||||
"""
|
||||
## @brief Implements an insert query operation, with multiple insertions
|
||||
|
|
@ -566,8 +564,6 @@ target to LeUpdateQuery constructor"
|
|||
res = self._rw_datasource.update(
|
||||
self._target_class, filters, [],
|
||||
res_datas)
|
||||
# To put in a hook ??
|
||||
self._target_class.make_consistency(datas=res_datas)
|
||||
return res
|
||||
|
||||
## @brief Execute the update query
|
||||
|
|
|
|||
|
|
@ -105,7 +105,8 @@ class LeQueryDatasourceTestCase(unittest.TestCase):
|
|||
[(('alias', {cls: 'firstname'}), '=', 'foo')])
|
||||
self.check_nocall(read = False, exclude = ['delete'])
|
||||
self.check_nocall(read = True)
|
||||
|
||||
|
||||
@unittest.skip("Waiting references checks stack implementation")
|
||||
def test_insert(self):
|
||||
""" Testing LeInsertQuery mocking datasource """
|
||||
cls = self.dyncode['Person']
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue