def declare_view_from_schema(viewcls: s_types.Type, *,
ctx: context.ContextLevel) -> s_types.Type:
vc = ctx.env.schema_view_cache.get(viewcls)
if vc is not None:
return vc
with ctx.detached() as subctx:
subctx.expr_exposed = False
view_expr = viewcls.get_expr(ctx.env.schema)
assert view_expr is not None
view_ql = qlparser.parse(view_expr.text)
viewcls_name = viewcls.get_name(ctx.env.schema)
assert isinstance(view_ql, qlast.Expr), 'expected qlast.Expr'
view_set = declare_view(view_ql,
alias=viewcls_name,
fully_detached=True,
ctx=subctx)
# The view path id _itself_ should not be in the nested namespace.
view_set.path_id = view_set.path_id.replace_namespace(
ctx.path_id_namespace)
vc = subctx.aliased_views[viewcls_name]
assert vc is not None
ctx.env.schema_view_cache[viewcls] = vc
ctx.source_map.update(subctx.source_map)
ctx.aliased_views[viewcls_name] = subctx.aliased_views[viewcls_name]
ctx.view_nodes[vc.get_name(ctx.env.schema)] = vc
ctx.view_sets[vc] = subctx.view_sets[vc]
return vc
def declare_view_from_schema(viewcls: s_types.Type, *,
ctx: context.ContextLevel) -> s_types.Type:
vc = ctx.env.schema_view_cache.get(viewcls)
if vc is not None:
return vc
with ctx.detached() as subctx:
subctx.expr_exposed = False
view_expr = viewcls.get_expr(ctx.env.schema)
assert view_expr is not None
view_ql = qlparser.parse(view_expr.text)
viewcls_name = viewcls.get_name(ctx.env.schema)
assert isinstance(view_ql, qlast.Expr), 'expected qlast.Expr'
view_set = declare_view(view_ql,
alias=viewcls_name,
fully_detached=True,
ctx=subctx)
# The view path id _itself_ should not be in the nested namespace.
view_set.path_id = view_set.path_id.replace_namespace(
ctx.path_id_namespace)
vc = subctx.aliased_views[viewcls_name]
assert vc is not None
if not ctx.in_temp_scope:
ctx.env.schema_view_cache[viewcls] = vc
ctx.source_map.update(subctx.source_map)
ctx.aliased_views[viewcls_name] = subctx.aliased_views[viewcls_name]
ctx.view_nodes[vc.get_name(ctx.env.schema)] = vc
ctx.view_sets[vc] = subctx.view_sets[vc]
# XXX: The current cardinality inference machine does not look
# into unreferenced expression parts, which includes computables
# that may be declared on an alias that another alias is referencing,
# leaving Unknown cardinalities in place. To fix this, copy
# cardinalities for computed pointers from the alias object in the
# schema.
view_type = setgen.get_set_type(view_set, ctx=subctx)
if isinstance(view_type, s_objtypes.ObjectType):
assert isinstance(viewcls, s_objtypes.ObjectType)
_fixup_cardinalities(
view_type,
viewcls,
ctx=ctx,
)
return vc
