如何使用rest调用将一个数据帧的模式应用于另一个空数据帧

问题描述

我在代工厂有两个数据集： df1 & df2,df1 具有带架构的数据。

df2 是没有应用架构的空数据帧。

使用数据代理，我能够从 df1 中提取架构

{
  "foundrySchema": {
    "fieldSchemaList": [
      {...

 }
    ],"primaryKey": null,"dataFrameReaderClass": "n/a","customMetadata": {}
  },"rows": []
}

如何通过休息调用将此架构应用于空数据帧 df2 ？

下面的代工厂示例展示了如何提交一个空事务， 此示例未显示如何应用架构

curl -X POST \
  -H "Authorization: Bearer ${TOKEN}" \
  -H "Content-Type: application/json" \
  -d '{}' \
  "${CATALOG_URL}/api/catalog/datasets/${DATASET_RID}/transactions/${TRANSACTION_RID}/commit"

解决方法

这是一个 Python 函数，用于为具有已提交事务的数据集上传架构：

from urllib.parse import quote_plus
import requests


def upload_dataset_schema(dataset_rid: str,transaction_rid: str,schema: dict,token: str,branch='master'):
    """
    Uploads the foundry dataset schema for a dataset,transaction,branch combination
    Args:
        dataset_rid: The rid of the dataset
        transaction_rid: The rid of the transaction
        schema: The foundry schema
        branch: The branch

    Returns: None

    """
    base_url = "https://foundry-instance/foundry-metadata/api"
    response = requests.post(f"{base_url}/schemas/datasets/"
                             f"{dataset_rid}/branches/{quote_plus(branch)}",params={'endTransactionRid': transaction_rid},json=schema,headers={
                                 'content-type': "application/json",'authorization': f"Bearer {token}",}
                             )
    response.raise_for_status()