数组
编辑数组编辑
在 Elasticsearch 中，没有专门的 array 数据类型。默认情况下，任何字段都可以包含零个或多个值，但是数组中的所有值必须是相同的数据类型。例如
- 字符串数组： [
"one","two"] - 整数数组： [
1,2] - 数组数组： [
1, [2,3]] 等同于 [1,2,3] - 对象数组： [
{ "name": "Mary", "age": 12 },{ "name": "John", "age": 10 }]
在动态添加字段时，数组中的第一个值决定了字段 type。所有后续值必须是相同的数据类型，或者至少必须能够 强制 后续值转换为相同的数据类型。
不支持混合数据类型的数组： [ 10, "some string" ]
数组可以包含 null 值，这些值要么被配置的 null_value 替换，要么完全跳过。空数组 [] 被视为缺失字段——没有值的字段。
无需在文档中使用数组之前进行任何预配置，它们开箱即用
resp = client.index(
index="my-index-000001",
id="1",
body={
"message": "some arrays in this document...",
"tags": ["elasticsearch", "wow"],
"lists": [
{"name": "prog_list", "description": "programming list"},
{"name": "cool_list", "description": "cool stuff list"},
],
},
)
print(resp)
resp = client.index(
index="my-index-000001",
id="2",
body={
"message": "no arrays in this document...",
"tags": "elasticsearch",
"lists": {"name": "prog_list", "description": "programming list"},
},
)
print(resp)
resp = client.search(
index="my-index-000001",
body={"query": {"match": {"tags": "elasticsearch"}}},
)
print(resp)
response = client.index(
index: 'my-index-000001',
id: 1,
body: {
message: 'some arrays in this document...',
tags: [
'elasticsearch',
'wow'
],
lists: [
{
name: 'prog_list',
description: 'programming list'
},
{
name: 'cool_list',
description: 'cool stuff list'
}
]
}
)
puts response
response = client.index(
index: 'my-index-000001',
id: 2,
body: {
message: 'no arrays in this document...',
tags: 'elasticsearch',
lists: {
name: 'prog_list',
description: 'programming list'
}
}
)
puts response
response = client.search(
index: 'my-index-000001',
body: {
query: {
match: {
tags: 'elasticsearch'
}
}
}
)
puts response
{
res, err := es.Index(
"my-index-000001",
strings.NewReader(`{
"message": "some arrays in this document...",
"tags": [
"elasticsearch",
"wow"
],
"lists": [
{
"name": "prog_list",
"description": "programming list"
},
{
"name": "cool_list",
"description": "cool stuff list"
}
]
}`),
es.Index.WithDocumentID("1"),
es.Index.WithPretty(),
)
fmt.Println(res, err)
}
{
res, err := es.Index(
"my-index-000001",
strings.NewReader(`{
"message": "no arrays in this document...",
"tags": "elasticsearch",
"lists": {
"name": "prog_list",
"description": "programming list"
}
}`),
es.Index.WithDocumentID("2"),
es.Index.WithPretty(),
)
fmt.Println(res, err)
}
{
res, err := es.Search(
es.Search.WithIndex("my-index-000001"),
es.Search.WithBody(strings.NewReader(`{
"query": {
"match": {
"tags": "elasticsearch"
}
}
}`)),
es.Search.WithPretty(),
)
fmt.Println(res, err)
}
PUT my-index-000001/_doc/1
{
"message": "some arrays in this document...",
"tags": [ "elasticsearch", "wow" ],
"lists": [
{
"name": "prog_list",
"description": "programming list"
},
{
"name": "cool_list",
"description": "cool stuff list"
}
]
}
PUT my-index-000001/_doc/2
{
"message": "no arrays in this document...",
"tags": "elasticsearch",
"lists": {
"name": "prog_list",
"description": "programming list"
}
}
GET my-index-000001/_search
{
"query": {
"match": {
"tags": "elasticsearch"
}
}
}