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Exercice2

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Université
2025-10-23 12:08:18 +02:00
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commit 95a745da35
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exercice2.md
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@@ -1,6 +1,6 @@
docker build -t mon-app . docker build -t mon-app .
http://localhost:3000 http://localhost:7474
@@ -21,19 +21,21 @@ SET p.nom = row.nom,
``` ```
LOAD CSV WITH HEADERS FROM 'file:///routes.csv' AS row LOAD CSV WITH HEADERS FROM 'file:///routes.csv' AS row
WITH row WITH row
MATCH (a:Lieu {id: toInteger(row.source)}) MATCH (a:Point {id: toInteger(row.source)})
WITH a, row WITH a, row
MATCH (b:Lieu {id: toInteger(row.target)}) MATCH (b:Point {id: toInteger(row.target)})
MERGE (a)-[r:ROUTE {route_id: toInteger(row.route_id)}]->(b) MERGE (a)-[r:ROUTE {route_id: toInteger(row.route_id)}]->(b)
SET r.tag = row.tag, r.cout = toFloat(row.cout); SET r.tag = row.tag, r.cout = toFloat(row.cout);
```
-- routes inverses si cout_inverse != -1 -- routes inverses si cout_inverse != -1
```
LOAD CSV WITH HEADERS FROM 'file:///routes.csv' AS row LOAD CSV WITH HEADERS FROM 'file:///routes.csv' AS row
WITH row WITH row
WHERE toFloat(row.cout_inverse) <> -1 WHERE toFloat(row.cout_inverse) <> -1
MATCH (a:Lieu {id: toInteger(row.source)}) MATCH (a:Point {id: toInteger(row.source)})
WITH a, row WITH a, row
MATCH (b:Lieu {id: toInteger(row.target)}) MATCH (b:Point {id: toInteger(row.target)})
MERGE (b)-[r:ROUTE {route_id: toInteger(row.route_id) * 1000}]->(a) MERGE (b)-[r:ROUTE {route_id: toInteger(row.route_id) * 1000}]->(a)
SET r.tag = row.tag, r.cout = toFloat(row.cout_inverse); SET r.tag = row.tag, r.cout = toFloat(row.cout_inverse);
``` ```