def __define_virtuals(self):
field_names = [field.name for field in self.fields]
for name in dir(self):
if not name.startswith("_"):
obj = self.__getattribute__(name)
if isinstance(obj, virtualfield):
if obj.field_name in field_names:
raise RuntimeError(
'virtualfield or fieldmethod cannot have same ' +
'name as an existent field!')
if isinstance(obj, fieldmethod):
#f = Field.Method(obj.field_name, lambda row, obj=obj,
# self=self: obj.f(self, row))
f = Field.Method(obj.field_name,
_virtualwrap(self, obj))
else:
#f = Field.Virtual(obj.field_name, lambda row, obj=obj,
# self=self: obj.f(self, row))
f = Field.Virtual(obj.field_name,
_virtualwrap(self, obj))
self.fields.append(f)
def __new__(
cls,
db,
action, # 'define_table' or 'Table'
prefix=None,
name=None,
auto_pk=None,
common_hook=None,
):
tname = name or cls.__name__
fields = list()
hooks = dict()
table_methods = dict(
) # https://github.com/web2py/pydal/blob/232e841765ee97ac6f7af45be794d46432085c4d/pydal/objects.py#L340
kwargs = dict()
need_pk = False
for name, attr in cls.__dict__.items():
if name.startswith('__'):
continue
# hooks
if name in HOOKS:
hooks[name] = attr
# Field.Virtual
elif isinstance(attr, property):
fields.append(DalField.Virtual(name, attr.fget))
# table method
elif isinstance(attr, classmethod):
table_methods[name] = attr.__func__
# just Field
elif isinstance(attr, Field):
attr.name = name
if not need_pk and auto_pk and name == 'id' and attr.args and attr.args[
0] != 'id':
need_pk = True
fields.append(DalField(name, *attr.args, **attr.kwargs))
# Field.Method
elif callable(attr):
fields.append(DalField.Method(name, attr))
else:
kwargs[name] = attr
for sign in cls.__bases__:
if sign is not Table:
fields.append(get_signature(db, sign))
args = [tname] + fields
if action == 'Table':
args.insert(0, db)
action = getattr(db, action)
# auto_pk
if need_pk and kwargs.get('primarykey') is None:
kwargs['primarykey'] = ['id']
# rname prefix
if prefix:
kwargs['rname'] = f"{prefix}{tname}"
# define table
tbl = action(*args, **kwargs) or db[tname]
# set hooks
for hook_name, hook in hooks.items():
tbl[f"_{hook_name}"].append(hook)
if common_hook:
for hook_name in HOOKS:
tbl[f"_{hook_name}"].append(
lambda *args, hook_name=hook_name, **kw: common_hook(
tbl, hook_name, *args, **kw))
# set table methods
for meth_name, meth in table_methods.items():
tbl.add_method.register(meth_name)(meth)
return tbl
