Guard pipe

api/s5_pipes.py

@@ -19,7 +19,9 @@ def get_pipe_schema(name: str) -> dict[str, dict[str, Any]]:
 
 
 def get_pipe(name: str, id: str) -> dict[str, Any]:
-    p = read(name, f"select * from pipes where id = '{id}'")
+    p = try_read(name, f"select * from pipes where id = '{id}'")
+    if p == None:
+        return {}
     d = {}
     d['id'] = str(p['id'])
     d['node1'] = str(p['node1'])
@@ -82,6 +84,10 @@ def set_pipe_cmd(name: str, cs: ChangeSet) -> DbChangeSet:
 
 
 def set_pipe(name: str, cs: ChangeSet) -> ChangeSet:
+    if 'id' not in cs.operations[0]:
+        return ChangeSet()
+    if get_pipe(name, cs.operations[0]['id']) == {}:
+        return ChangeSet()
     return execute_command(name, set_pipe_cmd(name, cs))
 
 
@@ -101,6 +107,10 @@ def add_pipe_cmd(name: str, cs: ChangeSet) -> DbChangeSet:
 
 
 def add_pipe(name: str, cs: ChangeSet) -> ChangeSet:
+    if 'id' not in cs.operations[0]:
+        return ChangeSet()
+    if get_pipe(name, cs.operations[0]['id']) != {}:
+        return ChangeSet()
     return execute_command(name, add_pipe_cmd(name, cs))
 
 
@@ -120,6 +130,10 @@ def delete_pipe_cmd(name: str, cs: ChangeSet) -> DbChangeSet:
 
 
 def delete_pipe(name: str, cs: ChangeSet) -> ChangeSet:
+    if 'id' not in cs.operations[0]:
+        return ChangeSet()
+    if get_pipe(name, cs.operations[0]['id']) == {}:
+        return ChangeSet()
     return execute_command(name, delete_pipe_cmd(name, cs))