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Feat: add child parent chunking method in backend. (#11598)

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### What problem does this PR solve?

#7996

### Type of change

- [x] New Feature (non-breaking change which adds functionality)
This commit is contained in:
Kevin Hu
2025-11-28 19:25:32 +08:00
committed by GitHub
parent d2915f6984
commit 14616cf845
10 changed files with 216 additions and 130 deletions
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50
rag/flow/splitter/splitter.py
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@ -13,10 +13,10 @@
# See the License for the specific language governing permissions and
# limitations under the License.
import random
import re
from copy import deepcopy
from functools import partial
import trio
from common.misc_utils import get_uuid
from rag.utils.base64_image import id2image, image2id
from deepdoc.parser.pdf_parser import RAGFlowPdfParser
@ -32,6 +32,7 @@ class SplitterParam(ProcessParamBase):
self.chunk_token_size = 512
self.delimiters = ["\n"]
self.overlapped_percent = 0
self.children_delimiters = []
def check(self):
self.check_empty(self.delimiters, "Delimiters.")
@ -58,6 +59,14 @@ class Splitter(ProcessBase):
deli += f"`{d}`"
else:
deli += d
child_deli = ""
for d in self._param.children_delimiters:
if len(d) > 1:
child_deli += f"`{d}`"
else:
child_deli += d
child_deli = [m.group(1) for m in re.finditer(r"`([^`]+)`", child_deli)]
custom_pattern = "|".join(re.escape(t) for t in sorted(set(child_deli), key=len, reverse=True))
self.set_output("output_format", "chunks")
self.callback(random.randint(1, 5) / 100.0, "Start to split into chunks.")
@ -78,7 +87,23 @@ class Splitter(ProcessBase):
deli,
self._param.overlapped_percent,
)
self.set_output("chunks", [{"text": c.strip()} for c in cks if c.strip()])
if custom_pattern:
docs = []
for c in cks:
if not c.strip():
continue
split_sec = re.split(r"(%s)" % custom_pattern, c, flags=re.DOTALL)
if split_sec:
for txt in split_sec:
docs.append({
"text": txt,
"mom": c
})
else:
docs.append({"text": c})
self.set_output("chunks", docs)
else:
self.set_output("chunks", [{"text": c.strip()} for c in cks if c.strip()])
self.callback(1, "Done.")
return
@ -100,12 +125,27 @@ class Splitter(ProcessBase):
{
"text": RAGFlowPdfParser.remove_tag(c),
"image": img,
"positions": [[pos[0][-1]+1, *pos[1:]] for pos in RAGFlowPdfParser.extract_positions(c)],
"positions": [[pos[0][-1]+1, *pos[1:]] for pos in RAGFlowPdfParser.extract_positions(c)]
}
for c, img in zip(chunks, images) if c.strip()
]
async with trio.open_nursery() as nursery:
for d in cks:
nursery.start_soon(image2id, d, partial(settings.STORAGE_IMPL.put, tenant_id=self._canvas._tenant_id), get_uuid())
self.set_output("chunks", cks)
if custom_pattern:
docs = []
for c in cks:
split_sec = re.split(r"(%s)" % custom_pattern, c["text"], flags=re.DOTALL)
if split_sec:
c["mom"] = c["text"]
for txt in split_sec:
cc = deepcopy(c)
cc["text"] = txt
docs.append(cc)
else:
docs.append(c)
self.set_output("chunks", docs)
else:
self.set_output("chunks", cks)
self.callback(1, "Done.")