def reduce_SET_NodeName_TURNSTILE_Expr(self, *kids):
# if the expression is trivial (a literal or variable), it
# should be treated as an eager expression
eager = isinstance(kids[3].val, (qlast.Constant, qlast.Tuple))
self.val = qlast.CreateAttributeValue(name=kids[1].val,
value=kids[3].val,
as_expr=not eager)
def _set_attribute_ast(self, context, node, name, value):
if isinstance(value, expr.ExpressionText):
value = qlast.ExpressionText(expr=str(value))
as_expr = isinstance(value, qlast.ExpressionText)
name_ref = qlast.ObjectRef(
name=name, module='')
node.commands.append(qlast.CreateAttributeValue(
name=name_ref, value=value, as_expr=as_expr))
def reduce_CreateViewShortStmt(self, *kids):
r"""%reduce \
CREATE VIEW NodeName TURNSTILE Expr \
"""
self.val = qlast.CreateView(name=kids[2].val,
commands=[
qlast.CreateAttributeValue(
name=qlast.ObjectRef(name='expr'),
value=kids[4].val,
as_expr=True)
])
def _get_ast(self, context):
value = self.new_value
new_value_empty = \
(value is None or
(isinstance(value, collections.Container) and not value))
old_value_empty = \
(self.old_value is None or
(isinstance(self.old_value, collections.Container) and
not self.old_value))
if new_value_empty and not old_value_empty:
op = qlast.DropAttributeValue(
name=qlast.ObjectRef(module='', name=self.property))
return op
if new_value_empty and old_value_empty:
return
if isinstance(value, s_expr.ExpressionText):
value = edgeql.parse(str(value))
elif utils.is_nontrivial_container(value):
value = qlast.Tuple(elements=[
qlast.Constant(value=el) for el in value
])
elif isinstance(value, nlang.WordCombination):
forms = value.as_dict()
if len(forms) > 1:
items = []
for k, v in forms.items():
items.append((
qlast.Constant(value=k),
qlast.Constant(value=v)
))
value = qlast.Array(elements=[
qlast.Tuple(elements=[k, v]) for k, v in items
])
else:
value = qlast.Constant(value=str(value))
else:
value = qlast.Constant(value=value)
as_expr = isinstance(value, qlast.ExpressionText)
op = qlast.CreateAttributeValue(
name=qlast.ObjectRef(module='', name=self.property),
value=value, as_expr=as_expr)
return op