我可以使用Golang将平面对象插入BigQuery中 - 我如何将嵌套数据插入到表中?使用Golang将嵌套数据插入BigQuery
我的BigQuery架构看起来像这样(从示例):
[{
"name": "kind",
"mode": "nullable",
"type": "string"
},
{
"name": "fullName",
"type": "string",
"mode": "required"
},
{ "name": "visit",
"type": "record",
"mode": "repeated",
"fields": [
{
"name": "time",
"type": "timestamp",
"mode": "nullable"
},
{
"name": "duration",
"type": "integer",
"mode": "nullable"
}
]
}
]
我第一次尝试将这个样子(例如):
func ExampleInsert(f string,) {
jsonRow := make(map[string]bigquery.JsonValue)
bq, _ := bigquery.New(client)
request := new(bigquery.TableDataInsertAllRequest)
rows := make([]*bigquery.TableDataInsertAllRequestRows, 1)
jsonRow["kind"] = bigquery.JsonValue(kind)
jsonRow["visit_duration"] = bigquery.JsonValue(duration)
rows[i] = new(bigquery.TableDataInsertAllRequestRows)
rows[i].Json = jsonRow
bq.Tabledata.InsertAll(projectID, "visits", "visitsv4", request)
...
}
哪些变平,并插入没有问题。我只是使用visit_duration
但是,我需要循环切片并添加到访问记录。我试图建立一个访问对象(无循环测试),并添加到该行,但它不是插入和我没有得到任何错误:
func ExampleInsert(f string,) {
jsonRow := make(map[string]bigquery.JsonValue)
bq, _ := bigquery.New(client)
request := new(bigquery.TableDataInsertAllRequest)
rows := make([]*bigquery.TableDataInsertAllRequestRows, 1)
jsonRow["kind"] = bigquery.JsonValue(kind)
visits := make([]*bigquery.TableDataInsertAllRequestRows, 1)
jsonVisit := make(map[string]bigquery.JsonValue)
jsonVisit["duration"] = rand.Intn(1000)
visits[0] = new(bigquery.TableDataInsertAllRequestRows)
visits[0].Json = jsonVisit
jsonRow["visit"] = visits
rows[i] = new(bigquery.TableDataInsertAllRequestRows)
rows[i].Json = jsonRow
bq.Tabledata.InsertAll(projectID, "visits", "visitsv4", request)
_, err := Call.Do()
}
--- [解决方法] --- -
正如意见建议,我也尝试创建一个切片,然后追加,请访问:
var visits []bigquery.JsonValue
visit := make(map[string]bigquery.JsonValue)
visit["duration"] = rand.Intn(100)
visits = append(visits, visit)
jsonRow["visit"] = visits
我可以证实这是实际可行的:)对于那些你读这篇文章,其原因它最初并不是,即使在添加一片后,也是因为我有c对着桌子。在这样做的时候,我也弄平了结果。小心。
我不是一个Golang的专家,但'访问'应该是'bigquery.JsonValue'的地图 – Pentium10
你可以举个例子吗? – simonmorley
'visited:= make(map [string] bigquery.JsonValue)' – Pentium10