lmiranda
053acf6436
Add schemas, parsers, loaders, and models for Toronto neighbourhood-centric data including census profiles, crime statistics, and amenities. Schemas: - NeighbourhoodRecord, CensusRecord, CrimeRecord, CrimeType - AmenityType, AmenityRecord, AmenityCount Models: - BridgeCMHCNeighbourhood (zone-to-neighbourhood mapping with weights) - FactCensus, FactCrime, FactAmenities Parsers: - TorontoOpenDataParser (CKAN API for neighbourhoods, census, amenities) - TorontoPoliceParser (crime rates, MCI data) Loaders: - load_census_data, load_crime_data, load_amenities - build_cmhc_neighbourhood_crosswalk (PostGIS area weights) Also updates CLAUDE.md with projman plugin workflow documentation. Closes #53, #54, #55, #56, #57, #58, #59 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
94 lines
2.6 KiB
Python
94 lines
2.6 KiB
Python
"""Loader for amenities data to fact_amenities table."""
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from collections import Counter
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from sqlalchemy.orm import Session
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from portfolio_app.toronto.models import FactAmenities
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from portfolio_app.toronto.schemas import AmenityCount, AmenityRecord
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from .base import get_session, upsert_by_key
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def load_amenities(
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records: list[AmenityRecord],
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year: int,
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session: Session | None = None,
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) -> int:
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"""Load amenity records to fact_amenities table.
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Aggregates individual amenity records into counts by neighbourhood
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and amenity type before loading.
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Args:
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records: List of validated AmenityRecord schemas.
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year: Year to associate with the amenity counts.
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session: Optional existing session.
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Returns:
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Number of records loaded (inserted + updated).
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"""
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# Aggregate records by neighbourhood and amenity type
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counts: Counter[tuple[int, str]] = Counter()
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for r in records:
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key = (r.neighbourhood_id, r.amenity_type.value)
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counts[key] += 1
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# Convert to AmenityCount schemas then to models
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def _load(sess: Session) -> int:
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models = []
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for (neighbourhood_id, amenity_type), count in counts.items():
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model = FactAmenities(
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neighbourhood_id=neighbourhood_id,
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amenity_type=amenity_type,
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count=count,
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year=year,
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)
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models.append(model)
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inserted, updated = upsert_by_key(
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sess, FactAmenities, models, ["neighbourhood_id", "amenity_type", "year"]
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)
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return inserted + updated
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if session:
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return _load(session)
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with get_session() as sess:
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return _load(sess)
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def load_amenity_counts(
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records: list[AmenityCount],
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session: Session | None = None,
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) -> int:
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"""Load pre-aggregated amenity counts to fact_amenities table.
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Args:
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records: List of validated AmenityCount schemas.
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session: Optional existing session.
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Returns:
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Number of records loaded (inserted + updated).
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"""
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def _load(sess: Session) -> int:
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models = []
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for r in records:
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model = FactAmenities(
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neighbourhood_id=r.neighbourhood_id,
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amenity_type=r.amenity_type.value,
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count=r.count,
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year=r.year,
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)
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models.append(model)
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inserted, updated = upsert_by_key(
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sess, FactAmenities, models, ["neighbourhood_id", "amenity_type", "year"]
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)
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return inserted + updated
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if session:
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return _load(session)
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with get_session() as sess:
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return _load(sess)
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