better display of floats, better rule for on_delete on models

core/models.py

@@ -12,6 +12,11 @@ class Etiquette(models.Model):
         return "%s" % self.nom
 
 
+def get_placeholder_label():
+    print("get placeholder")
+    return Etiquette.objects.get_or_create(nom="Mettez-moi à jour")[0]
+
+
 class MonthManager(models.Manager):
 
 
@@ -75,7 +80,8 @@ class Enregistrement(models.Model):
 
     date = models.DateField()
     montant = models.FloatField()
-    etiquette = models.ForeignKey(Etiquette)
+    etiquette = models.ForeignKey(Etiquette,
+                                  on_delete=models.SET(get_placeholder_label))
     description = models.CharField(max_length=512)
 
     def __str__(self):
@@ -84,10 +90,13 @@ class Enregistrement(models.Model):
     class Meta:
         ordering = ('date',)
 
+
+
 class EnregistrementRecursif(models.Model):
     jour = models.IntegerField()
     montant = models.FloatField()
-    etiquette = models.ForeignKey(Etiquette)
+    etiquette = models.ForeignKey(Etiquette, 
+                                  on_delete=models.SET(get_placeholder_label))
     description = models.CharField(max_length=512)
     created_date = models.DateField()
 

core/templates/core/index.html

@@ -43,7 +43,7 @@
  </div>
  <div class="col-md-3 mt-3">
   <h2 class="page-title">Balance 
-    <span class="badge float-right badge-{% if data.balance > 0 %}success{% else %}danger{% endif%}">{{ data.balance }} €</span>
+    <span class="badge float-right badge-{% if data.balance > 0 %}success{% else %}danger{% endif%}">{{ data.balance|floatformat:-2 }} €</span>
   </h2>
   <div class="card mt-3" >
    <div class="card-header">
@@ -52,7 +52,7 @@
     <ul class="list-group list-group-flush">
      {% for label, montant in data.par_etiquette.items %}
      <li class="list-group-item">{{ label }} 
-       <span class="badge badge-dark p-2 align-middle float-right">{{ montant }} €</span>
+       <span class="badge badge-dark p-2 align-middle float-right">{{ montant|floatformat:-2 }} €</span>
      </li>
      {% endfor %}
     </ul>