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chore: refactor ingestion

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This commit is contained in:
Stijnvandenbroek
2026-03-05 21:36:53 +00:00
parent d5d3c2b649
commit 2ab1d71b53
13 changed files with 156 additions and 71 deletions
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145
data_platform/assets/ingestion/funda/funda.py
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@@ -1,6 +1,7 @@
"""Funda real-estate ingestion assets."""
import json
import time
from pathlib import Path
from dagster import (
@@ -10,6 +11,7 @@ from dagster import (
MetadataValue,
asset,
)
from funda import Listing
from sqlalchemy import text
from data_platform.helpers import (
@@ -94,14 +96,14 @@ def raw_funda_search_results(
all_listings = []
for page in range(config.max_pages):
context.log.info(f"Fetching search page {page + 1}/{config.max_pages} …")
context.log.info(f"Fetching search page {page + 1}/{config.max_pages}...")
kwargs["page"] = page
results = client.search_listing(**kwargs)
if not results:
context.log.info("No more results.")
break
all_listings.extend(results)
context.log.info(f" got {len(results)} listings (total: {len(all_listings)})")
context.log.info(f"Got {len(results)} listings (total: {len(all_listings)}).")
if not all_listings:
context.log.warning("Search returned zero results.")
@@ -109,7 +111,9 @@ def raw_funda_search_results(
engine = postgres.get_engine()
with engine.begin() as conn:
conn.execute(text(f"CREATE SCHEMA IF NOT EXISTS {_SCHEMA}"))
conn.execute(
text(render_sql(_SQL_DIR, "ddl/create_schema.sql", schema=_SCHEMA))
)
conn.execute(
text(render_sql(_SQL_DIR, "ddl/create_search_results.sql", schema=_SCHEMA))
)
@@ -150,10 +154,11 @@ def raw_funda_search_results(
with engine.begin() as conn:
result = conn.execute(
text(
f"UPDATE {_SCHEMA}.search_results"
f" SET is_active = FALSE"
f" WHERE last_seen_at < now() - INTERVAL '7 days'"
f" RETURNING global_id"
render_sql(
_SQL_DIR,
"dml/mark_inactive_search_results.sql",
schema=_SCHEMA,
)
)
)
newly_inactive = result.rowcount
@@ -202,23 +207,21 @@ def raw_funda_listing_details(
engine = postgres.get_engine()
with engine.begin() as conn:
conn.execute(text(f"CREATE SCHEMA IF NOT EXISTS {_SCHEMA}"))
conn.execute(
text(render_sql(_SQL_DIR, "ddl/create_schema.sql", schema=_SCHEMA))
)
conn.execute(
text(render_sql(_SQL_DIR, "ddl/create_listing_details.sql", schema=_SCHEMA))
)
with engine.connect() as conn:
if config.fetch_all:
query = text(f"SELECT DISTINCT global_id FROM {_SCHEMA}.search_results")
query = text(
render_sql(_SQL_DIR, "dml/select_all_detail_ids.sql", schema=_SCHEMA)
)
else:
query = text(
f"""
SELECT DISTINCT s.global_id
FROM {_SCHEMA}.search_results s
LEFT JOIN {_SCHEMA}.listing_details d ON s.global_id = d.global_id
WHERE s.is_active = TRUE
AND (d.global_id IS NULL OR d.is_stale = TRUE)
"""
render_sql(_SQL_DIR, "dml/select_new_detail_ids.sql", schema=_SCHEMA)
)
result = conn.execute(query)
ids = [row[0] for row in result if row[0]]
@@ -227,7 +230,7 @@ def raw_funda_listing_details(
context.log.warning("No search results found – run funda_search_results first.")
return MaterializeResult(metadata={"count": 0})
context.log.info(f"Fetching details for {len(ids)} listings …")
context.log.info(f"Fetching details for {len(ids)} listings...")
rows = []
errors = 0
@@ -282,7 +285,9 @@ def raw_funda_listing_details(
continue
if (i + 1) % 10 == 0:
context.log.info(f" fetched {i + 1}/{len(ids)} …")
context.log.info(f"Fetched {i + 1}/{len(ids)} listings.")
time.sleep(1)
if rows:
postgres.execute_many(
@@ -293,14 +298,11 @@ def raw_funda_listing_details(
with engine.begin() as conn:
conn.execute(
text(
f"""
UPDATE {_SCHEMA}.listing_details d
SET is_stale = TRUE
FROM {_SCHEMA}.search_results s
WHERE d.global_id = s.global_id
AND s.is_active = FALSE
AND d.is_stale = FALSE
"""
render_sql(
_SQL_DIR,
"dml/mark_stale_listing_details.sql",
schema=_SCHEMA,
)
)
)
@@ -345,78 +347,89 @@ def raw_funda_price_history(
engine = postgres.get_engine()
with engine.begin() as conn:
conn.execute(text(f"CREATE SCHEMA IF NOT EXISTS {_SCHEMA}"))
conn.execute(
text(render_sql(_SQL_DIR, "ddl/create_schema.sql", schema=_SCHEMA))
)
conn.execute(
text(render_sql(_SQL_DIR, "ddl/create_price_history.sql", schema=_SCHEMA))
)
# Fetch listing metadata (url, title, postcode) from the DB so we can call
# get_price_history without re-fetching each listing from the Funda API.
with engine.connect() as conn:
if config.fetch_all:
query = text(f"SELECT DISTINCT global_id FROM {_SCHEMA}.listing_details")
query = text(
render_sql(
_SQL_DIR,
"dml/select_all_price_history_listings.sql",
schema=_SCHEMA,
)
)
else:
query = text(
f"""
SELECT DISTINCT d.global_id
FROM {_SCHEMA}.listing_details d
JOIN {_SCHEMA}.search_results s ON d.global_id = s.global_id
WHERE s.is_active = TRUE
UNION
SELECT DISTINCT d.global_id
FROM {_SCHEMA}.listing_details d
LEFT JOIN {_SCHEMA}.price_history p ON d.global_id = p.global_id
WHERE p.global_id IS NULL
"""
render_sql(
_SQL_DIR,
"dml/select_new_price_history_listings.sql",
schema=_SCHEMA,
)
)
result = conn.execute(query)
ids = [row[0] for row in result if row[0]]
listings = [(row[0], row[1], row[2], row[3]) for row in result if row[0]]
if not ids:
if not listings:
context.log.warning(
"No listing details found – run funda_listing_details first."
)
return MaterializeResult(metadata={"count": 0})
context.log.info(f"Fetching price history for {len(ids)} listings …")
context.log.info(f"Fetching price history for {len(listings)} listings...")
rows = []
batch_size = 25
total_rows = 0
errors = 0
for i, gid in enumerate(ids):
for i, (gid, url, title, postcode) in enumerate(listings):
try:
listing = client.get_listing(int(gid))
history = client.get_price_history(listing)
for entry in history:
rows.append(
{
"global_id": gid,
"price": safe_int(entry.get("price")),
"human_price": entry.get("human_price"),
"date": entry.get("date"),
"timestamp": entry.get("timestamp"),
"source": entry.get("source"),
"status": entry.get("status"),
}
stub = Listing(data={"url": url, "title": title, "postcode": postcode})
history = client.get_price_history(stub)
rows = [
{
"global_id": gid,
"price": safe_int(entry.get("price")),
"human_price": entry.get("human_price"),
"date": entry.get("date"),
"timestamp": entry.get("timestamp"),
"source": entry.get("source"),
"status": entry.get("status"),
}
for entry in history
]
if rows:
postgres.execute_many(
render_sql(
_SQL_DIR, "dml/insert_price_history.sql", schema=_SCHEMA
),
rows,
)
total_rows += len(rows)
except Exception as e:
errors += 1
context.log.warning(f"Failed to fetch price history for {gid}: {e}")
continue
if (i + 1) % 10 == 0:
context.log.info(f" fetched {i + 1}/{len(ids)} …")
if (i + 1) % batch_size == 0:
context.log.info(f"Fetched {i + 1}/{len(listings)} price histories.")
if rows:
postgres.execute_many(
render_sql(_SQL_DIR, "dml/insert_price_history.sql", schema=_SCHEMA), rows
)
time.sleep(1)
context.log.info(
f"Inserted {len(rows)} price history records ({errors} errors) into {_SCHEMA}.price_history"
f"Inserted {total_rows} price history records ({errors} errors) "
f"into {_SCHEMA}.price_history"
)
return MaterializeResult(
metadata={
"count": len(rows),
"count": total_rows,
"errors": errors,
"listings_processed": len(ids) - errors,
"listings_processed": len(listings) - errors,
}
)

1
data_platform/assets/ingestion/funda/sql/ddl/create_schema.sql Normal file
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@@ -0,0 +1 @@
create schema if not exists {{ schema }};

4
data_platform/assets/ingestion/funda/sql/dml/mark_inactive_search_results.sql Normal file
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@@ -0,0 +1,4 @@
update {{ schema }}.search_results
set is_active = false
where last_seen_at < now() - interval '7 days'
returning global_id

7
data_platform/assets/ingestion/funda/sql/dml/mark_stale_listing_details.sql Normal file
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@@ -0,0 +1,7 @@
update {{ schema }}.listing_details d
set is_stale = true
from {{ schema }}.search_results as s
where
d.global_id = s.global_id
and s.is_active = false
and d.is_stale = false

2
data_platform/assets/ingestion/funda/sql/dml/select_all_detail_ids.sql Normal file
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@@ -0,0 +1,2 @@
select distinct global_id
from {{ schema }}.search_results

6
data_platform/assets/ingestion/funda/sql/dml/select_all_price_history_listings.sql Normal file
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@@ -0,0 +1,6 @@
select distinct
d.global_id,
d.url,
d.title,
d.postcode
from {{ schema }}.listing_details as d

6
data_platform/assets/ingestion/funda/sql/dml/select_new_detail_ids.sql Normal file
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@@ -0,0 +1,6 @@
select distinct s.global_id
from {{ schema }}.search_results as s
left join {{ schema }}.listing_details as d on s.global_id = d.global_id
where
s.is_active = true
and (d.global_id is null or d.is_stale = true)

17
data_platform/assets/ingestion/funda/sql/dml/select_new_price_history_listings.sql Normal file
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@@ -0,0 +1,17 @@
select distinct
d.global_id,
d.url,
d.title,
d.postcode
from {{ schema }}.listing_details as d
inner join {{ schema }}.search_results as s on d.global_id = s.global_id
where s.is_active = true
union
select distinct
d.global_id,
d.url,
d.title,
d.postcode
from {{ schema }}.listing_details as d
left join {{ schema }}.price_history as p on d.global_id = p.global_id
where p.global_id is null