105 lines
3.6 KiB
Python
105 lines
3.6 KiB
Python
#This file is part of Tryton. The COPYRIGHT file at the top level of
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#this repository contains the full copyright notices and license terms.
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import inspect
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import copy
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from trytond.model.fields.field import Field
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class Function(Field):
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'''
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Define function field (any).
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'''
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def __init__(self, field, getter, setter=None, searcher=None,
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loading='lazy'):
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'''
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:param field: The field of the function.
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:param getter: The name of the function for getting values.
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:param setter: The name of the function to set value.
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:param searcher: The name of the function to search.
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:param loading: Define how the field must be loaded:
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``lazy`` or ``eager``.
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'''
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assert isinstance(field, Field)
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self._field = field
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self._type = field._type
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self.getter = getter
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self.setter = setter
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if not self.setter:
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self._field.readonly = True
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self.searcher = searcher
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assert loading in ('lazy', 'eager'), \
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'loading must be "lazy" or "eager"'
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self.loading = loading
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__init__.__doc__ += Field.__init__.__doc__
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def __copy__(self):
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return Function(copy.copy(self._field), self.getter,
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setter=self.setter, searcher=self.searcher)
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def __deepcopy__(self, memo):
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return Function(copy.deepcopy(self._field, memo),
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copy.deepcopy(self.getter, memo),
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setter=copy.deepcopy(self.setter, memo),
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searcher=copy.deepcopy(self.searcher, memo),
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loading=copy.deepcopy(self.loading, memo))
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def __getattr__(self, name):
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return getattr(self._field, name)
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def __getitem__(self, name):
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return self._field[name]
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def __setattr__(self, name, value):
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if name in ('_field', '_type', 'getter', 'setter', 'searcher', 'name'):
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object.__setattr__(self, name, value)
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if name != 'name':
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return
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setattr(self._field, name, value)
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def search(self, model, name, clause):
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'''
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Call the searcher.
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Return a list of clauses.
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'''
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if not self.searcher:
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model.raise_user_error('search_function_missing', name)
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return getattr(model, self.searcher)(name, tuple(clause))
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def get(self, ids, Model, name, values=None):
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'''
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Call the getter.
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If the function has ``names`` in the function definition then
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it will call it with a list of name.
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'''
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def call(name):
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method = getattr(Model, self.getter)
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records = Model.browse(ids)
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if not hasattr(method, 'im_self') or method.im_self:
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return method(records, name)
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else:
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return dict((r.id, method(r, name)) for r in records)
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if isinstance(name, list):
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names = name
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# Test is the function works with a list of names
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if 'names' in inspect.getargspec(getattr(Model, self.getter))[0]:
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return call(names)
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return dict((name, call(name)) for name in names)
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else:
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# Test is the function works with a list of names
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if 'names' in inspect.getargspec(getattr(Model, self.getter))[0]:
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name = [name]
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return call(name)
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def set(self, ids, Model, name, value):
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'''
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Call the setter.
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'''
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if self.setter:
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getattr(Model, self.setter)(Model.browse(ids), name, value)
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def __set__(self, inst, value):
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self._field.__set__(inst, value)
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