Add APIs for Knowledge Base Tag Management and Dataset Binding (#20023)

Co-authored-by: lizb <lizb@sugon.com>

api/services/tag_service.py

@@ -44,6 +44,17 @@ class TagService:
         results = [tag_binding.target_id for tag_binding in tag_bindings]
         return results
 
+    @staticmethod
+    def get_tag_by_tag_name(tag_type: str, current_tenant_id: str, tag_name: str) -> list:
+        tags = (
+            db.session.query(Tag)
+            .filter(Tag.name == tag_name, Tag.tenant_id == current_tenant_id, Tag.type == tag_type)
+            .all()
+        )
+        if not tags:
+            return []
+        return tags
+
     @staticmethod
     def get_tags_by_target_id(tag_type: str, current_tenant_id: str, target_id: str) -> list:
         tags = (
@@ -62,6 +73,8 @@ class TagService:
 
     @staticmethod
     def save_tags(args: dict) -> Tag:
+        if TagService.get_tag_by_tag_name(args["type"], current_user.current_tenant_id, args["name"]):
+            raise ValueError("Tag name already exists")
         tag = Tag(
             id=str(uuid.uuid4()),
             name=args["name"],
@@ -75,6 +88,8 @@ class TagService:
 
     @staticmethod
     def update_tags(args: dict, tag_id: str) -> Tag:
+        if TagService.get_tag_by_tag_name(args["type"], current_user.current_tenant_id, args["name"]):
+            raise ValueError("Tag name already exists")
         tag = db.session.query(Tag).filter(Tag.id == tag_id).first()
         if not tag:
             raise NotFound("Tag not found")