重构现代化 FastAPI 后端项目框架

resources/sql/create/7.valves.sql

@@ -0,0 +1,17 @@
+-- [VALVES]
+
+create type valves_type as enum ('PRV', 'PSV', 'PBV', 'FCV', 'TCV', 'GPV');
+
+create table valves
+(
+  id varchar(32) primary key references _link(id)
+, node1 varchar(32) references _node(id) not null
+, node2 varchar(32) references _node(id) not null
+, diameter float8 not null
+, v_type valves_type not null
+, setting text not null
+, minor_loss float8 not null
+);
+
+-- delete when delete node1
+-- delete when delete node2