Add size and max_size check

Author: WaVEV

django_mongodb_backend/fields/array.py

@@ -31,8 +31,6 @@ def __init__(self, base_field, max_size=None, size=None, **kwargs):
         self.base_field = base_field
         self.max_size = max_size
         self.size = size
-        if size and max_size:
-            raise ValueError("Cannot define both, size and max_size")
         if self.max_size:
             self.default_validators = [
                 *self.default_validators,
@@ -106,6 +104,14 @@ def check(self, **kwargs):
                             id="django_mongodb_backend.array.W004",
                         )
                     )
+        if self.size and self.max_size:
+            errors.append(
+                checks.Error(
+                    "ArrayField cannot specify both size and max_size.",
+                    obj=self,
+                    id="django_mongodb_backend.array.E003",
+                )
+            )
         return errors
 
     def set_attributes_from_name(self, name):

tests/model_fields_/test_arrayfield.py

@@ -646,6 +646,15 @@ class MyModel(models.Model):
         self.assertEqual(len(errors), 1)
         self.assertEqual(errors[0].id, "django_mongodb_backend.array.E002")
 
+    def test_invalid_parameters(self):
+        class MyModel(models.Model):
+            field = ArrayField(models.CharField(max_length=3), size=3, max_size=4)
+
+        model = MyModel()
+        errors = model.check()
+        self.assertEqual(len(errors), 1)
+        self.assertEqual(errors[0].id, "django_mongodb_backend.array.E003")
+
     def test_invalid_default(self):
         class MyModel(models.Model):
             field = ArrayField(models.IntegerField(), default=[])