JSON文件
JSON加载器使用JSON指针来定位您想要定位的JSON文件中的键。
无JSON指针示例
最简单的使用方式是不指定JSON指针。 加载程序将加载JSON对象中找到的所有字符串。
示例JSON文件:
{
"texts": ["This is a sentence.", "This is another sentence."]
}
示例代码:
import { JSONLoader } from "langchain/document_loaders/fs/json";
const loader = new JSONLoader("src/document_loaders/example_data/example.json");
const docs = await loader.load();
/*
[
Document {
"metadata": {
"blobType": "application/json",
"line": 1,
"source": "blob",
},
"pageContent": "This is a sentence.",
},
Document {
"metadata": {
"blobType": "application/json",
"line": 2,
"source": "blob",
},
"pageContent": "This is another sentence.",
},
]
*/
使用JSON指针示例
您可以通过选择要从JSON对象中提取字符串的哪些键来执行更高级的场景。
在此示例中，我们仅想从“from”和“surname”条目中提取信息。
{
"1": {
"body": "BD 2023 SUMMER",
"from": "LinkedIn Job",
"labels": ["IMPORTANT", "CATEGORY_UPDATES", "INBOX"]
},
"2": {
"body": "Intern, Treasury and other roles are available",
"from": "LinkedIn Job2",
"labels": ["IMPORTANT"],
"other": {
"name": "plop",
"surname": "bob"
}
}
}
示例代码:
import { JSONLoader } from "langchain/document_loaders/fs/json";
const loader = new JSONLoader(
"src/document_loaders/example_data/example.json",
["/from", "/surname"]
);
const docs = await loader.load();
/*
[
Document {
"metadata": {
"blobType": "application/json",
"line": 1,
"source": "blob",
},
"pageContent": "BD 2023 SUMMER",
},
Document {
"metadata": {
"blobType": "application/json",
"line": 2,
"source": "blob",
},
"pageContent": "LinkedIn Job",
},
...
]