change MonthField from CharField to DateField

counter/forms.py

@@ -378,19 +378,21 @@ BasketForm = forms.formset_factory(
 
 
 class InvoiceCallForm(forms.Form):
-    def __init__(self, *args, month=None, clubs: list[Club] | None = None, **kwargs):
+    def __init__(self, *args, month, clubs: list[Club] | None = None, **kwargs):
         super().__init__(*args, **kwargs)
         self.month = month
         self.clubs = clubs
 
         if self.clubs is None:
             self.clubs = []
+
         invoices = {
             i["club_id"]: i["is_validated"]
-            for i in InvoiceCall.objects.filter(club__in=self.clubs).values(
-                "club_id", "is_validated"
-            )
+            for i in InvoiceCall.objects.filter(
+                club__in=self.clubs, month=self.month
+            ).values("club_id", "is_validated")
         }
+
         for club in self.clubs:
             is_validated = invoices.get(club.id, False)
 

counter/migrations/0032_invoicecall.py

@@ -1,4 +1,4 @@
-# Generated by Django 5.2 on 2025-06-14 14:35
+# Generated by Django 5.2.3 on 2025-09-09 10:24
 
 import django.db.models.deletion
 from django.db import migrations, models
@@ -25,13 +25,11 @@ class Migration(migrations.Migration):
                         verbose_name="ID",
                     ),
                 ),
-                ("is_validated", models.BooleanField(verbose_name="is validated")),
                 (
-                    "month",
-                    counter.models.MonthField(
-                        max_length=7, verbose_name="invoice date"
-                    ),
+                    "is_validated",
+                    models.BooleanField(default=False, verbose_name="is validated"),
                 ),
+                ("month", counter.models.MonthField(verbose_name="invoice date")),
                 (
                     "club",
                     models.ForeignKey(

counter/models.py

@@ -1364,46 +1364,33 @@ class ReturnableProductBalance(models.Model):
         )
 
 
-class MonthField(models.CharField):
-    description = _("Year + month field")
-
-    def __init__(self, *args, **kwargs):
-        kwargs["max_length"] = 7
-        super().__init__(*args, **kwargs)
-
-    def db_type(self, connection):
-        return "char(7)"
-
-    def from_db_value(self, value, expression, connection):
-        if value is None:
-            return value
-        try:
-            year, month = value.split("-")
-            return date(year, month, 1)
-        except (ValueError, TypeError):
-            return value
+class MonthField(models.DateField):
+    description = _("Year + month field (day forced to 1)")
+    default_error_messages = {
+        "invalid": _(
+            "“%(value)s” value has an invalid date format. It must be "
+            "in YYYY-MM format."
+        ),
+        "invalid_date": _(
+            "“%(value)s” value has the correct format (YYYY-MM) "
+            "but it is an invalid date."
+        ),
+    }
 
     def to_python(self, value):
         if isinstance(value, date):
-            return value
+            return value.replace(day=1)
+
         if isinstance(value, str):
             try:
-                year, month = value.split("-")
+                year, month = map(int, value.split("-"))
                 return date(year, month, 1)
-            except ValueError:
-                pass
-        return value
+            except (ValueError, TypeError) as err:
+                raise ValueError(
+                    self.error_messages["invalid"] % {"value": value}
+                ) from err
 
-    def get_prep_value(self, value):
-        if isinstance(value, date):
-            return value.strftime("%Y-%m")
-        if isinstance(value, str) and len(value) == 7 and value[4] == "-":
-            return value
-        return value
-
-    def value_to_string(self, obj):
-        value = self.value_from_object(obj)
-        return self.get_prep_value(value)
+        return super().to_python(value)
 
 
 class InvoiceCall(models.Model):