Fix: add fallback for bad citation output (#7014)

### What problem does this PR solve?

Add fallback for bad citation output. #6948

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

api/db/services/dialog_service.py

@@ -271,8 +271,10 @@ def chat(dialog, messages, stream=True, **kwargs):
         if len(ans) == 2:
             think = ans[0] + "</think>"
             answer = ans[1]
+
         if knowledges and (prompt_config.get("quote", True) and kwargs.get("quote", True)):
             answer = re.sub(r"##[ij]\$\$", "", answer, flags=re.DOTALL)
+            idx = set([])
             if not re.search(r"##[0-9]+\$\$", answer):
                 answer, idx = retriever.insert_citations(
                     answer,
@@ -283,12 +285,21 @@ def chat(dialog, messages, stream=True, **kwargs):
                     vtweight=dialog.vector_similarity_weight,
                 )
             else:
-                idx = set([])
-                for r in re.finditer(r"##([0-9]+)\$\$", answer):
-                    i = int(r.group(1))
+                for match in re.finditer(r"##([0-9]+)\$\$", answer):
+                    i = int(match.group(1))
                     if i < len(kbinfos["chunks"]):
                         idx.add(i)
 
+            # handle (ID: 1), ID: 2 etc.
+            for match in re.finditer(r"\(\s*ID:\s*(\d+)\s*\)|ID[: ]+\s*(\d+)", answer):
+                full_match = match.group(0)
+                id = match.group(1) or match.group(2)
+                if id:
+                    i = int(id)
+                    if i < len(kbinfos["chunks"]):
+                        idx.add(i)
+                    answer = answer.replace(full_match, f"##{i}$$")
+
             idx = set([kbinfos["chunks"][int(i)]["doc_id"] for i in idx])
             recall_docs = [d for d in kbinfos["doc_aggs"] if d["doc_id"] in idx]
             if not recall_docs:

rag/prompts.py

@@ -31,7 +31,8 @@ def chunks_format(reference):
     def get_value(d, k1, k2):
         return d.get(k1, d.get(k2))
 
-    return [{
+    return [
+        {
             "id": get_value(chunk, "chunk_id", "id"),
             "content": get_value(chunk, "content", "content_with_weight"),
             "document_id": get_value(chunk, "doc_id", "document_id"),
@@ -43,7 +44,9 @@ def chunks_format(reference):
             "similarity": chunk.get("similarity"),
             "vector_similarity": chunk.get("vector_similarity"),
             "term_similarity": chunk.get("term_similarity"),
-    } for chunk in reference.get("chunks", [])]
+        }
+        for chunk in reference.get("chunks", [])
+    ]
 
 
 def llm_id2llm_type(llm_id):
@@ -63,8 +66,7 @@ def message_fit_in(msg, max_length=4000):
         nonlocal msg
         tks_cnts = []
         for m in msg:
-            tks_cnts.append(
-                {"role": m["role"], "count": num_tokens_from_string(m["content"])})
+            tks_cnts.append({"role": m["role"], "count": num_tokens_from_string(m["content"])})
         total = 0
         for m in tks_cnts:
             total += m["count"]
@@ -137,6 +139,10 @@ def citation_prompt():
 - Inserts CITATIONS in format '##i$$ ##j$$' where i,j are the ID of the content you are citing and encapsulated with '##' and '$$'.
 - Inserts the CITATION symbols at the end of a sentence, AND NO MORE than 4 citations.
 - DO NOT insert CITATION in the answer if the content is not from retrieved chunks.
+- DO NOT use standalone Document IDs (e.g., '#ID#').
+- Under NO circumstances any other citation styles or formats (e.g., '~~i==', '[i]', '(i)', etc.) be used.
+- Citations ALWAYS the '##i$$' format.
+- Any failure to adhere to the above rules, including but not limited to incorrect formatting, use of prohibited styles, or unsupported citations, will be considered a error, should skip adding Citation for this sentence.
 
 --- Example START ---
 <SYSTEM>: Here is the knowledge base:
@@ -185,10 +191,7 @@ Requirements:
 {content}
 
 """
-    msg = [
-        {"role": "system", "content": prompt},
-        {"role": "user", "content": "Output: "}
-    ]
+    msg = [{"role": "system", "content": prompt}, {"role": "user", "content": "Output: "}]
     _, msg = message_fit_in(msg, chat_mdl.max_length)
     kwd = chat_mdl.chat(prompt, msg[1:], {"temperature": 0.2})
     if isinstance(kwd, tuple):
@@ -215,10 +218,7 @@ Requirements:
 {content}
 
 """
-    msg = [
-        {"role": "system", "content": prompt},
-        {"role": "user", "content": "Output: "}
-    ]
+    msg = [{"role": "system", "content": prompt}, {"role": "user", "content": "Output: "}]
     _, msg = message_fit_in(msg, chat_mdl.max_length)
     kwd = chat_mdl.chat(prompt, msg[1:], {"temperature": 0.2})
     if isinstance(kwd, tuple):
@@ -345,10 +345,7 @@ Output:
 {content}
 
 """
-    msg = [
-        {"role": "system", "content": prompt},
-        {"role": "user", "content": "Output: "}
-    ]
+    msg = [{"role": "system", "content": prompt}, {"role": "user", "content": "Output: "}]
     _, msg = message_fit_in(msg, chat_mdl.max_length)
     kwd = chat_mdl.chat(prompt, msg[1:], {"temperature": 0.5})
     if isinstance(kwd, tuple):
@@ -361,8 +358,8 @@ Output:
         return json_repair.loads(kwd)
     except json_repair.JSONDecodeError:
         try:
-            result = kwd.replace(prompt[:-1], '').replace('user', '').replace('model', '').strip()
-            result = '{' + result.split('{')[1].split('}')[0] + '}'
+            result = kwd.replace(prompt[:-1], "").replace("user", "").replace("model", "").strip()
+            result = "{" + result.split("{")[1].split("}")[0] + "}"
             return json_repair.loads(result)
         except Exception as e:
             logging.exception(f"JSON parsing error: {result} -> {e}")