all pit stops can now be edited and deleted

not only the last pit stop can be edited and deleted.

app/forms/checks.py

@@ -4,8 +4,8 @@ from datetime import date
 
 def odometer_date_check(form, field):
     """
-    Checks that the entered date and odometer of the pitstop is conformant to the existing pitstops. That means, if a
-    pitstops date is between to other pitstops, the odometer should be as well.
+    Checks that the entered date and odometer of the pit stop is conformant to the existing pit stops. That means, if a
+    pitstops date is between two other pit stops, the odometer should be as well.
     :param form:
     :param field:
     :return:
@@ -29,6 +29,33 @@ def odometer_date_check(form, field):
                                           % (pitstops[index].odometer,pitstops[index+1].odometer))
 
 
+def edit_odometer_date_check(form, field):
+    """
+    This makes exactly the same checks as 'odometer_date_check' but the odometers may be the same (to change only amount
+    and price).
+
+    :param form:
+    :param field:
+    :return:
+    """
+    odometer = form.odometer.data
+    date = form.date.data
+    pitstops = form.pitstops
+
+    if len(pitstops) > 0:
+        if date < pitstops[0].date and odometer > pitstops[0].odometer:
+            raise ValidationError('The new odometer value must be less than %i km' % pitstops[0].odometer)
+
+        if date >= pitstops[-1].date and odometer < pitstops[-1].odometer:
+            raise ValidationError('The new odometer value must be greater than %i km' % pitstops[-1].odometer)
+
+    if len(pitstops) > 1:
+        for index in range(0, len(pitstops)-1):
+            if pitstops[index].date <= date < pitstops[index + 1].date:
+                if odometer < pitstops[index].odometer or odometer > pitstops[index+1].odometer:
+                    raise ValidationError('The new odometer value must be greater than %i km and less than %i km'
+                                          % (pitstops[index].odometer,pitstops[index+1].odometer))
+
 
 def date_check(form, field):
     """

app/forms/pitstop.py

@@ -9,13 +9,17 @@ class DeletePitStopForm(FlaskForm):
 
 
 class EditPitstopForm(FlaskForm):
-    date = DateField('Date of Pitstop', validators=[date_check])
-    odometer = IntegerField('Odometer (km)', validators=[odometer_check])
+    date = DateField('Date of Pitstop')
+    odometer = IntegerField('Odometer (km)', validators=[edit_odometer_date_check])
     litres = DecimalField('Litres (l)', places=2, validators=[litres_check])
-    costs = DecimalField('Costs (€, overall)', places=2, validators=[edit_costs_check])
+    costs = DecimalField('Costs (€, overall)', places=2, validators=[costs_check])
     submit = SubmitField(label='Update it!')
     last_pitstop = None
     same_odometer_allowed = True
+    pitstops = []
+
+    def set_pitstops(self, pitstops):
+        self.pitstops = pitstops
 
     def set_pitstop(self, last_pitstop):
         self.last_pitstop = last_pitstop
@@ -33,6 +37,12 @@ class EditPitstopForm(FlaskForm):
         if self.costs.data:
             self.costs.default = self.costs.data
 
+    def get_hint_messages(self):
+        messages = {
+            'litres': 'Litres must be higher than 0.01 L.',
+            'costs': 'Costs must be higher than 0.01 €.'
+        }
+        return messages
 
 class CreatePitstopForm(FlaskForm):
     date = DateField('Date of Pitstop')