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This commit is contained in:
Eugene Burmakin 2025-07-23 20:35:42 +02:00
parent 94f6dbe18e
commit 7920209187
2 changed files with 18 additions and 5 deletions
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6
app/assets/builds/tailwind.css Normal file
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17
app/models/concerns/distanceable.rb
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@ -60,18 +60,25 @@ module Distanceable
point_pairs = points.each_cons(2).to_a
return [] if point_pairs.empty?
values_clause = point_pairs.map.with_index do |(p1, p2), index|
"(#{index}, ST_GeomFromEWKT('#{p1.lonlat}')::geography, ST_GeomFromEWKT('#{p2.lonlat}')::geography)"
# Create parameterized placeholders for VALUES clause
values_placeholders = point_pairs.map.with_index do |_, index|
base_idx = index * 3
"($#{base_idx + 1}, ST_GeomFromEWKT($#{base_idx + 2})::geography, ST_GeomFromEWKT($#{base_idx + 3})::geography)"
end.join(', ')
# Single query to calculate all distances
results = connection.execute(<<-SQL.squish)
# Flatten parameters: [pair_id, lonlat1, lonlat2, pair_id, lonlat1, lonlat2, ...]
params = point_pairs.flat_map.with_index do |(p1, p2), index|
[index, p1.lonlat, p2.lonlat]
end
# Single query to calculate all distances using parameterized query
results = connection.exec_params(<<-SQL.squish, params)
WITH point_pairs AS (
SELECT
pair_id,
point1,
point2
FROM (VALUES #{values_clause}) AS t(pair_id, point1, point2)
FROM (VALUES #{values_placeholders}) AS t(pair_id, point1, point2)
)
SELECT
pair_id,