Display age of data

wetter/models.py

@@ -2,6 +2,8 @@
 
 from wetter import db
 
+from datetime import datetime, timedelta
+
 class Stations(db.Model):
     __tablename__ = 'stations'
     id = db.Column(db.Integer, primary_key=True)
@@ -13,6 +15,19 @@ class Stations(db.Model):
     state = db.Column(db.String)
     sea_level = db.Column(db.Integer)
 
+    def climate_date_range(self):
+        r = db.session.query(db.func.min(Climate.date), db.func.max(Climate.date)).filter_by(station=self.id).one()
+        return {"min": r[0], "max": r[1]}
+
+    def climate_date_old(self):
+        return self.climate_date_range()["max"] < (datetime.today().date() - timedelta(days=1))
+
+    def climate_count(self):
+        return db.session.query(db.func.count(Climate.id)).filter_by(station=self.id).one()[0]
+
+    def __str__(self):
+        return self.name
+
 class Climate(db.Model):
     __tablename__ = 'climate'
     id = db.Column(db.Integer, primary_key=True)

wetter/templates/export.html

@@ -27,13 +27,13 @@
       <div class="col-sm-6">
           <div class="form-group">
               <label for="datetimepicker-from">von</label>
-              <input type="date" value="{{ fr }}" name="from" class="form-control" id="datetimepicker-from" required max="{{ today }}">
+              <input type="date" value="{{ fr }}" name="from" class="form-control" id="datetimepicker-from" required min="{{ station.climate_date_range()["min"] }}" max="{{ station.climate_date_range()["max"] }}">
           </div>
       </div>
       <div class="col-sm-6">
           <div class="form-group">
               <label for="datetimepicker-to">bis</label>
-              <input type="date" value="{{ to }}" name="to" class="form-control" id="datetimepicker-to" required max="{{ today }}">
+              <input type="date" value="{{ to }}" name="to" class="form-control" id="datetimepicker-to" required min="{{ station.climate_date_range()["min"] }}" max="{{ station.climate_date_range()["max"] }}">
           </div>
       </div>
   </div>

wetter/templates/station.html

@@ -9,6 +9,11 @@
 
 {% block content %}
 <section>
+  {% if station.climate_date_old() %}
+  <div class="alert alert-danger" role="alert">
+    Die letzten Messwerte zu dieser Station sind von {{ station.climate_date_range()["max"] }}.
+  </div>
+  {% endif %}
   <div class="card ">
     <div class="embed-responsive embed-responsive-16by9">
       <div class="clickoverlay embed-responsive-item">
@@ -60,6 +65,7 @@
     </div>
     <div class="list-group list-group-flush">
       <a href="https://opendata.dwd.de/climate_environment/CDC/observations_germany/climate/daily/kl/recent/tageswerte_KL_{{ station.dwd_id }}_akt.zip" class="list-group-item" target="_blank">Aktueller Source vom DWD</a>
+      <div class="list-group-item">Bereich Messdaten: {{ station.climate_date_range()["min"] }} - {{ station.climate_date_range()["max"] }}</div>
       <div class="list-group-item">Letztes Update: {{ station.dwd_last_update }}</div>
     </div>
   </div>