perf(orgs): 默认组织改为实体组织，并支持全局组织 (#5617)

* perf(orgs): 默认组织改为实体组织

* perf: 添加获取当前组织信息的api

* perf: 资产列表在 root 组织下的表现

* fix: 修复 root 组织引起的问题

* perf: 优化OrgModelMixin save; org_root获取; org_roles获取; UserCanUseCurrentOrg权限类

Co-authored-by: ibuler <ibuler@qq.com>
Co-authored-by: Bai <bugatti_it@163.com>

apps/assets/api/node.py

@@ -127,9 +127,13 @@ class NodeChildrenApi(generics.ListCreateAPIView):
     def get_object(self):
         pk = self.kwargs.get('pk') or self.request.query_params.get('id')
         key = self.request.query_params.get("key")
+
         if not pk and not key:
-            node = Node.org_root()
             self.is_initial = True
+            if current_org.is_root():
+                node = None
+            else:
+                node = Node.org_root()
             return node
         if pk:
             node = get_object_or_404(Node, pk=pk)
@@ -137,16 +141,26 @@ class NodeChildrenApi(generics.ListCreateAPIView):
             node = get_object_or_404(Node, key=key)
         return node
 
+    def get_org_root_queryset(self, query_all):
+        if query_all:
+            return Node.objects.all()
+        else:
+            return Node.org_root_nodes()
+
     def get_queryset(self):
         query_all = self.request.query_params.get("all", "0") == "all"
-        if not self.instance:
-            return Node.objects.none()
+
+        if self.is_initial and current_org.is_root():
+            return self.get_org_root_queryset(query_all)
 
         if self.is_initial:
             with_self = True
         else:
             with_self = False
 
+        if not self.instance:
+            return Node.objects.none()
+
         if query_all:
             queryset = self.instance.get_all_children(with_self=with_self)
         else:
@@ -178,7 +192,7 @@ class NodeChildrenAsTreeApi(SerializeToTreeNodeMixin, NodeChildrenApi):
 
     def get_assets(self):
         include_assets = self.request.query_params.get('assets', '0') == '1'
-        if not include_assets:
+        if not self.instance or not include_assets:
             return []
         assets = self.instance.get_assets().only(
             "id", "hostname", "ip", "os", "platform_id",
@@ -240,7 +254,10 @@ class NodeRemoveAssetsApi(generics.UpdateAPIView):
         node.assets.remove(*assets)
 
         # 把孤儿资产添加到 root 节点
-        orphan_assets = Asset.objects.filter(id__in=[a.id for a in assets], nodes__isnull=True).distinct()
+        orphan_assets = Asset.objects.filter(
+            id__in=[a.id for a in assets],
+            nodes__isnull=True
+        ).distinct()
         Node.org_root().assets.add(*orphan_assets)