存储
编辑store
编辑默认情况下，字段值会被索引以便于搜索，但它们不会被存储。这意味着可以查询该字段，但无法检索原始字段值。
通常这无关紧要。字段值已经包含在_source字段中，该字段默认情况下会被存储。如果您只想检索单个字段或几个字段的值，而不是整个_source，那么可以使用源过滤来实现。
在某些情况下，store 字段是有意义的。例如，如果您的文档包含 title、date 和一个非常大的 content 字段，您可能只想检索 title 和 date，而不必从大型的 _source 字段中提取这些字段。
resp = client.indices.create(
index="my-index-000001",
mappings={
"properties": {
"title": {
"type": "text",
"store": True
},
"date": {
"type": "date",
"store": True
},
"content": {
"type": "text"
}
}
},
)
print(resp)
resp1 = client.index(
index="my-index-000001",
id="1",
document={
"title": "Some short title",
"date": "2015-01-01",
"content": "A very long content field..."
},
)
print(resp1)
resp2 = client.search(
index="my-index-000001",
stored_fields=[
"title",
"date"
],
)
print(resp2)
response = client.indices.create(
index: 'my-index-000001',
body: {
mappings: {
properties: {
title: {
type: 'text',
store: true
},
date: {
type: 'date',
store: true
},
content: {
type: 'text'
}
}
}
}
)
puts response
response = client.index(
index: 'my-index-000001',
id: 1,
body: {
title: 'Some short title',
date: '2015-01-01',
content: 'A very long content field...'
}
)
puts response
response = client.search(
index: 'my-index-000001',
body: {
stored_fields: [
'title',
'date'
]
}
)
puts response
const response = await client.indices.create({
index: "my-index-000001",
mappings: {
properties: {
title: {
type: "text",
store: true,
},
date: {
type: "date",
store: true,
},
content: {
type: "text",
},
},
},
});
console.log(response);
const response1 = await client.index({
index: "my-index-000001",
id: 1,
document: {
title: "Some short title",
date: "2015-01-01",
content: "A very long content field...",
},
});
console.log(response1);
const response2 = await client.search({
index: "my-index-000001",
stored_fields: ["title", "date"],
});
console.log(response2);
PUT my-index-000001
{
"mappings": {
"properties": {
"title": {
"type": "text",
"store": true
},
"date": {
"type": "date",
"store": true
},
"content": {
"type": "text"
}
}
}
}
PUT my-index-000001/_doc/1
{
"title": "Some short title",
"date": "2015-01-01",
"content": "A very long content field..."
}
GET my-index-000001/_search
{
"stored_fields": [ "title", "date" ]
}
存储的字段作为数组返回
为了保持一致性，存储的字段始终以数组的形式返回，因为无法知道原始字段值是单个值、多个值还是空数组。
如果您需要原始值，则应从 _source 字段中检索。