How to upload data with key_name by Google App Engine bulkloader

问题

I can upload data, but key_name is empty. How can I use the 'id' in the CSV as the key_name on datastore?

I'like to use 'id' as the key_name, because other data uses the 'id' as the foreign key. I'm new to Google App Engine.

This is the CSV data.

"id","name"
"1","USA"
"2","France"
"3","Italy"

This is the YAML

- model: model.testcountry.TestCountry
  connector: csv
  connector_options:
    encoding: utf-8
    columns: from_header
  property_map:
    - property: __key__
      external_name: id
    - property: name
      external_name: name

P.S: I'm trying upload data to the local enviroment.

Update

Thank you for the help, I tried the code, but it does not work well. The result is strange.

In the terminal window a log message tells me that uploading finished successfully, however I cannot find any records in the Google App Engine console (http://localhost:8080/_ah/admin/datastore). The datastore is empty, there is no record.

The log message in the terminal window is this

Entering command

appcfg.py upload_data --config_file=bulkloader.yaml --filename=testcountries.csv --kind=TestCountry --url=http://localhost:8080/remote_api --num_thread=1

Result message

Uploading data records.
[INFO    ] Logging to bulkloader/log.log
[INFO    ] Throttling transfers:
[INFO    ] Bandwidth: 250000 bytes/second
[INFO    ] HTTP connections: 8/second
[INFO    ] Entities inserted/fetched/modified: 20/second
[INFO    ] Batch Size: 10
Please enter login credentials for localhost:8080
Email: xxxxxxx
Password for l: 
[INFO    ] Opening database: bulkloader-progress-20110609.003032.sql3
[INFO    ] Connecting to localhost:8080/remote_api
[INFO    ] Starting import; maximum 10 entities per post
..........
[INFO    ] 100 entities total, 0 previously transferred
[INFO    ] 100 entities (3362 bytes) transferred in 1.9 seconds
[INFO    ] All entities successfully transferred

I also tried this, but result was same. The terminal says success but in the Google App Engine console there are no records....

import_transform: int

PS: I'm using Mac OS X Snow Leopard and Google App Engine launcher.

回答1:

Try this:

- import: google.appengine.ext.bulkload.transform
- model: model.testcountry.TestCountry
  connector: csv
  connector_options:
    encoding: utf-8
    columns: from_header
    property_map:
    - property: __key__
      external_name: id
      import_transform: transform.create_foreign_key('TestCountry')
    - property: name
      external_name: name

来源：https://stackoverflow.com/questions/6273688/how-to-upload-data-with-key-name-by-google-app-engine-bulkloader

标签

python

google-app-engine

bulkloader