我正在尝试查询每个会话中生成的平均请求，我在将数据放入索引时插入了一个 session_id，我想计算不同的会话并取出平均值，同时检查我知道的数据映射它在文本字段中：
"session_id": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
},
为了获取我调用的数据：
$this->elasticsearch->search([
'index' => 'nits_media_bid_won',
'body' => [
'query' => $query,
'aggs' => [
'total_session' => [
'cardinality' => [
'field' => 'session_id',
'precision_threshold' => 100,
]
]
]
]
]);
但我收到一条错误消息：
{
"error":{
"root_cause":[
{
"type":"illegal_argument_exception",
"reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [session_id] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."
}
],
"type":"search_phase_execution_exception",
"reason":"all shards failed",
"phase":"query",
"grouped":true,
"failed_shards":[
{
"shard":0,
"index":"nits_media_bid_won",
"node":"q438L5GRSqaHJz1_vRtZXg",
"reason":{
"type":"illegal_argument_exception",
"reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [session_id] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."
}
}
],
"caused_by":{
"type":"illegal_argument_exception",
"reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [session_id] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.",
"caused_by":{
"type":"illegal_argument_exception",
"reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [session_id] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."
}
}
},
"status":400
}
如果我根据关键字进行更改：
'total_session' => [
'cardinality' => [
'field' => 'session_id.fields.keyword',
'precision_threshold' => 100,
]
]
它给了我 0 价值
"aggregations": {
"total_session": {
"value": 0
}
}