From 108d7d6be52e2e9c477270f8aadeeecb541c58d4 Mon Sep 17 00:00:00 2001
From: jlayec <jlayec@gmail.com>
Date: Sat, 1 May 2021 18:33:39 +0000
Subject: [PATCH] fix view charge without trip after

---
 web/db.py    |  9 +++++++++
 web/views.py | 10 +++++++---
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/web/db.py b/web/db.py
index 6654a23..28a7caf 100644
--- a/web/db.py
+++ b/web/db.py
@@ -140,6 +140,15 @@ class Database:
             return None
         return res[0]
 
+    @staticmethod
+    def get_range_timestamp():
+        conn = Database.get_db()
+        first = conn.execute("SELECT Timestamp FROM position ORDER BY Timestamp limit 1").fetchone()
+        last = conn.execute("SELECT Timestamp FROM position ORDER BY Timestamp DESC limit 1").fetchone()
+        if first is None or last is None:
+            return None, None
+        return first[0], last[0]
+
     @staticmethod
     def set_chargings_price(conn, start_at, price):
         if isinstance(start_at, str):
diff --git a/web/views.py b/web/views.py
index ac330da..74d64b0 100644
--- a/web/views.py
+++ b/web/views.py
@@ -250,12 +250,14 @@ def update_trips():
         chargings = Charging.get_chargings()
     except (StopIteration, AssertionError):
         logger.debug("No trips yet")
-        return
+        # return
     # update for slider
     global min_date, max_date, min_millis, max_millis, step, marks
     try:
-        min_date = trips[0].start_at
-        max_date = trips[-1].start_at
+        # min_date = trips[0].start_at
+        # max_date = trips[-1].start_at
+        min_date, max_date = Database.get_range_timestamp()
+        logger.debug("min_date:%s - max_date:%s",min_date, max_date)
         min_millis = figures.unix_time_millis(min_date)
         max_millis = figures.unix_time_millis(max_date)
         step = (max_millis - min_millis) / 100
@@ -263,6 +265,8 @@ def update_trips():
         cached_layout = None  # force regenerate layout
     except (ValueError, IndexError):
         logger.error("update_trips (slider): %s", exc_info=True)
+    except AttributeError:
+        logger.debug("position table is probably empty :", exc_info=True)
     return