fix: merchant not required at customer create api

api_man/serializers.py

@@ -136,6 +136,41 @@ class CustomerSerializer(BaseSerializer):
         required=False,
     )
 
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.validators = [
+            validator
+            for validator in self.validators
+            if not (
+                hasattr(validator, 'fields')
+                and tuple(validator.fields) == ('merchant', 'name')
+            )
+        ]
+
+    def _get_request_merchant(self):
+        request = self.context.get('request')
+        try:
+            return request.user.employee.merchant
+        except AttributeError:
+            return None
+
+    def validate(self, attrs):
+        attrs = super().validate(attrs)
+
+        merchant = self._get_request_merchant() or attrs.get('merchant') or getattr(self.instance, 'merchant', None)
+        name = attrs.get('name', getattr(self.instance, 'name', None))
+
+        if merchant and name:
+            queryset = basic_models.Customer.objects.filter(merchant=merchant, name=name)
+            if self.instance is not None:
+                queryset = queryset.exclude(pk=self.instance.pk)
+            if queryset.exists():
+                raise serializers.ValidationError({
+                    'name': '该商户下已存在同名客户。'
+                })
+
+        return attrs
+
     class Meta:
         model = basic_models.Customer
         fields = '__all__'