Felder mit verschachtelten Werten von JSON in CSV exportieren

Question

Ich muss einige JSON-Daten importieren, die in meine Datenbank gelangen. Ich würde gerne PowerShell verwenden und ein wenig herausfinden, aber ich brauche Hilfe, um das letzte Stück zusammen zu bekommen.

Hier ist mein vorhandenes PowerShell-Skript.

(Get-Content $path -Raw | ConvertFrom-json) | 
select -Expand data | select -Expand stations | Export-CSV 
"C:\CitiBike\output.csv" 

Es tut alles, aber rental_methods raus. Meine Frage ist, wie kann ich Mietmodalitäten mit der ID der Station bekommen?

Hier ist meine JSON-Daten:

{ 
    "last_updated":1475973127, 
    "ttl":10, 
    "data":{ 
     "stations":[ 
     { 
      "station_id":"72", 
      "name":"W 52 St & 11 Ave", 
      "short_name":"6926.01", 
      "lat":40.76727216, 
      "lon":-73.99392888, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":39, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"79", 
      "name":"Franklin St & W Broadway", 
      "short_name":"5430.08", 
      "lat":40.71911552, 
      "lon":-74.00666661, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":33, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"82", 
      "name":"St James Pl & Pearl St", 
      "short_name":"5167.06", 
      "lat":40.71117416, 
      "lon":-74.00016545, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":27, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"83", 
      "name":"Atlantic Ave & Fort Greene Pl", 
      "short_name":"4354.07", 
      "lat":40.68382604, 
      "lon":-73.97632328, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":62, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"116", 
      "name":"W 17 St & 8 Ave", 
      "short_name":"6148.02", 
      "lat":40.74177603, 
      "lon":-74.00149746, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":39, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"119", 
      "name":"Park Ave & St Edwards St", 
      "short_name":"4700.06", 
      "lat":40.69608941, 
      "lon":-73.97803415, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":19, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"120", 
      "name":"Lexington Ave & Classon Ave", 
      "short_name":"4452.03", 
      "lat":40.68676793, 
      "lon":-73.95928168, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":19, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"127", 
      "name":"Barrow St & Hudson St", 
      "short_name":"5805.05", 
      "lat":40.73172428, 
      "lon":-74.00674436, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":31, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"128", 
      "name":"MacDougal St & Prince St", 
      "short_name":"5687.04", 
      "lat":40.72710258, 
      "lon":-74.00297088, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":30, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"137", 
      "name":"E 56 St & Madison Ave", 
      "short_name":"6771.02", 
      "lat":40.761628, 
      "lon":-73.972924, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":46, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"143", 
      "name":"Clinton St & Joralemon St", 
      "short_name":"4605.04", 
      "lat":40.69239502, 
      "lon":-73.99337909, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":24, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"144", 
      "name":"Nassau St & Navy St", 
      "short_name":"4812.02", 
      "lat":40.69839895, 
      "lon":-73.98068914, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":19, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"146", 
      "name":"Hudson St & Reade St", 
      "short_name":"5359.10", 
      "lat":40.71625008, 
      "lon":-74.0091059, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":39, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"147", 
      "name":"Greenwich St & Warren St", 
      "short_name":"5329.01", 
      "lat":40.71542197, 
      "lon":-74.01121978, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":33, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"150", 
      "name":"E 2 St & Avenue C", 
      "short_name":"5476.03", 
      "lat":40.7208736, 
      "lon":-73.98085795, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":31, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"151", 
      "name":"Cleveland Pl & Spring St", 
      "short_name":"5492.05", 
      "lat":40.722103786686034, 
      "lon":-73.99724900722504, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":33, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"152", 
      "name":"Warren St & Church St", 
      "short_name":"5288.09", 
      "lat":40.71473993, 
      "lon":-74.00910627, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":29, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"153", 
      "name":"E 40 St & 5 Ave", 
      "short_name":"6474.11", 
      "lat":40.752062307, 
      "lon":-73.9816324043, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":55, 
      "eightd_has_key_dispenser":false 
     }, 
     { 
      "station_id":"157", 
      "name":"Henry St & Atlantic Ave", 
      "short_name":"4531.05", 
      "lat":40.69089272, 
      "lon":-73.99612349, 
      "region_id":71, 
      "rental_methods":[ 
       "KEY", 
       "CREDITCARD" 
      ], 
      "capacity":23, 
      "eightd_has_key_dispenser":false 
     } 
     ] 
    } 
} 

Answer 1

CSV Felder müssen flach Werte sein, nicht verschachtelte Objekte oder Arrays. Verbinden Sie die Elemente in eine Zeichenfolge:

Get-Content r:\1.json -Raw | 
    ConvertFrom-Json | 
    Select -Expand data | 
    Select -Expand stations | 
    ForEach { 
     $_.rental_methods = $_.rental_methods -join ' ' 
     $_ 
    } | 
    Export-Csv r:\1.csv -NoTypeInformation