AssertionError：内部：未指定默认项目

气流新手。尝试运行 SQL 并将结果存储在 BigQuery 表中。

出现以下错误。不确定在哪里设置default_rpoject_id。

请帮我。

Error:

Traceback (most recent call last):
  File "/usr/local/bin/airflow", line 28, in <module>
    args.func(args)
  File "/usr/local/lib/python2.7/dist-packages/airflow/bin/cli.py", line 585, in test
    ti.run(ignore_task_deps=True, ignore_ti_state=True, test_mode=True)
  File "/usr/local/lib/python2.7/dist-packages/airflow/utils/db.py", line 53, in wrapper
    result = func(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/airflow/models.py", line 1374, in run
    result = task_copy.execute(context=context)
  File "/usr/local/lib/python2.7/dist-packages/airflow/contrib/operators/bigquery_operator.py", line 82, in execute
    self.allow_large_results, self.udf_config, self.use_legacy_sql)
  File "/usr/local/lib/python2.7/dist-packages/airflow/contrib/hooks/bigquery_hook.py", line 228, in run_query
    default_project_id=self.project_id)
  File "/usr/local/lib/python2.7/dist-packages/airflow/contrib/hooks/bigquery_hook.py", line 917, in _split_tablename
    assert default_project_id is not None, "INTERNAL: No default project is specified"
AssertionError: INTERNAL: No default project is specified

Code:

sql_bigquery = BigQueryOperator(
        task_id='sql_bigquery',
        use_legacy_sql=False,
        write_disposition='WRITE_TRUNCATE',
        allow_large_results=True,
        bql='''
            #standardSQL
                SELECT ID, Name, Group, Mark, RATIO_TO_REPORT(Mark) OVER(PARTITION BY Group) AS percent FROM `tensile-site-168620.temp.marks`
                ''',
        destination_dataset_table='temp.percentage',
        dag=dag
        )

编辑：我终于通过简单地添加解决了这个问题bigquery_conn_id='bigquery'在单独的 python 脚本中运行以下代码后，BigQueryOperator 任务中的参数。

显然，您需要在 Airflow UI 的 Admin -> Connection 中指定您的项目 ID。您必须以 JSON 对象的形式执行此操作，例如“project”：“”。

就我个人而言，我无法让网络服务器在 GCP 上运行，所以这是不可行的。这里有一个程序化的解决方案：

from airflow.models import Connection
from airflow.settings import Session

session = Session()
gcp_conn = Connection(
    conn_id='bigquery',
    conn_type='google_cloud_platform',
    extra='{"extra__google_cloud_platform__project":"<YOUR PROJECT HERE>"}')
if not session.query(Connection).filter(
        Connection.conn_id == gcp_conn.conn_id).first():
    session.add(gcp_conn)
    session.commit()

这些建议来自这里有一个类似的问题。 https://stackoverflow.com/questions/39178629/setting-up-airflow-with-bigquery-operator