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example(paper-metadata): rearrange code ordering to make it clearer #715

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Jul 8, 2025
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example(paper-metadata): rearrange code ordering to make it clearer #715

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45 changes: 25 additions & 20 deletions examples/paper_metadata/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -83,10 +83,11 @@ def paper_metadata_flow(
)

paper_metadata = data_scope.add_collector()
metadata_embeddings = data_scope.add_collector()
author_papers = data_scope.add_collector()
metadata_embeddings = data_scope.add_collector()

with data_scope["documents"].row() as doc:
# Extract metadata
doc["basic_info"] = doc["content"].transform(extract_basic_info)
doc["first_page_md"] = doc["basic_info"]["first_page"].transform(
pdf_to_markdown
Expand All @@ -100,6 +101,24 @@ def paper_metadata_flow(
instruction="Please extract the metadata from the first page of the paper.",
)
)

# Collect metadata
paper_metadata.collect(
filename=doc["filename"],
title=doc["metadata"]["title"],
authors=doc["metadata"]["authors"],
abstract=doc["metadata"]["abstract"],
num_pages=doc["basic_info"]["num_pages"],
)

# Collect author to filename mapping
with doc["metadata"]["authors"].row() as author:
author_papers.collect(
author_name=author["name"],
filename=doc["filename"],
)

# Embed title and abstract, and collect embeddings
doc["title_embedding"] = doc["metadata"]["title"].transform(
cocoindex.functions.SentenceTransformerEmbed(
model="sentence-transformers/all-MiniLM-L6-v2"
Expand All @@ -119,27 +138,13 @@ def paper_metadata_flow(
min_chunk_size=200,
chunk_overlap=150,
)

paper_metadata.collect(
filename=doc["filename"],
title=doc["metadata"]["title"],
authors=doc["metadata"]["authors"],
abstract=doc["metadata"]["abstract"],
num_pages=doc["basic_info"]["num_pages"],
)
metadata_embeddings.collect(
id=cocoindex.GeneratedField.UUID,
filename=doc["filename"],
location="title",
text=doc["metadata"]["title"],
embedding=doc["title_embedding"],
)
with doc["metadata"]["authors"].row() as author:
author_papers.collect(
author_name=author["name"],
filename=doc["filename"],
)

with doc["abstract_chunks"].row() as chunk:
chunk["embedding"] = chunk["text"].transform(
cocoindex.functions.SentenceTransformerEmbed(
Expand All @@ -159,6 +164,11 @@ def paper_metadata_flow(
cocoindex.targets.Postgres(),
primary_key_fields=["filename"],
)
author_papers.export(
"author_papers",
cocoindex.targets.Postgres(),
primary_key_fields=["author_name", "filename"],
)
metadata_embeddings.export(
"metadata_embeddings",
cocoindex.targets.Postgres(),
Expand All @@ -170,8 +180,3 @@ def paper_metadata_flow(
)
],
)
author_papers.export(
"author_papers",
cocoindex.targets.Postgres(),
primary_key_fields=["author_name", "filename"],
)