From d7dda41fd85a117394e1d49eea1b42700714a752 Mon Sep 17 00:00:00 2001
From: Sven Augustin <sven.augustin@psi.ch>
Date: Fri, 27 May 2022 19:52:30 +0200
Subject: [PATCH] dump on demand

---
 stand.py    | 3 ---
 tableapi.py | 5 +++++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/stand.py b/stand.py
index 22e23e8..50c5530 100644
--- a/stand.py
+++ b/stand.py
@@ -47,9 +47,6 @@ if not new_df.equals(df) and not changed:
     restapi.data = df = new_df
 
 
-restapi.dfh.dump()
-
-
 print(">>> end of streamlit run")
 
 
diff --git a/tableapi.py b/tableapi.py
index b901102..7607523 100644
--- a/tableapi.py
+++ b/tableapi.py
@@ -19,7 +19,11 @@ class TableAPI:
 
     @data.setter
     def data(self, df):
+        if self.dfh.df.equals(df):
+            print("<<< skipping dump because dataframe did not change")
+            return
         self.dfh.df = df
+        self.dfh.dump()
 
 
     def GET(self):
@@ -30,6 +34,7 @@ class TableAPI:
         kwargs = kwargs or cp.request.json
         self.dfh.append(kwargs)
         self._trigger_changed()
+        self.dfh.dump()
         return str(self.dfh.df)
 
     def DELETE(self):