我正在编写一个脚本,使用NodeJS和Docooment进行批量导入(从CSV)到documentDB。
有没有办法进行批量插入?
我知道它基于Mongoose,但Mongoose的批量插入示例与特定的MongoDB功能有关。
答案 0 :(得分:2)
我建议使用以下选项之一:
DocumentDB的数据迁移工具
将数据从CSV批量导入DocumentDB的最简单方法是使用DocumentDB的迁移工具。您可以找到有关如何使用它的详细信息here。
以编程方式通过存储过程(数据库端脚本)
如果您想以编程方式批量导入数据,我建议您查看DocumentDB的存储过程 - 它允许您在数据库服务器本身上执行批处理和排序操作(避免发出多个网络请求)。
以下是批量导入数据的sample stored procedure:
/**
* This script called as stored procedure to import lots of documents in one batch.
* The script sets response body to the number of docs imported and is called multiple times
* by the client until total number of docs desired by the client is imported.
* @param {Object[]} docs - Array of documents to import.
*/
function bulkImport(docs) {
var collection = getContext().getCollection();
var collectionLink = collection.getSelfLink();
// The count of imported docs, also used as current doc index.
var count = 0;
// Validate input.
if (!docs) throw new Error("The array is undefined or null.");
var docsLength = docs.length;
if (docsLength == 0) {
getContext().getResponse().setBody(0);
}
// Call the CRUD API to create a document.
tryCreate(docs[count], callback);
// Note that there are 2 exit conditions:
// 1) The createDocument request was not accepted.
// In this case the callback will not be called, we just call setBody and we are done.
// 2) The callback was called docs.length times.
// In this case all documents were created and we don't need to call tryCreate anymore. Just call setBody and we are done.
function tryCreate(doc, callback) {
var isAccepted = collection.createDocument(collectionLink, doc, callback);
// If the request was accepted, callback will be called.
// Otherwise report current count back to the client,
// which will call the script again with remaining set of docs.
// This condition will happen when this stored procedure has been running too long
// and is about to get cancelled by the server. This will allow the calling client
// to resume this batch from the point we got to before isAccepted was set to false
if (!isAccepted) getContext().getResponse().setBody(count);
}
// This is called when collection.createDocument is done and the document has been persisted.
function callback(err, doc, options) {
if (err) throw err;
// One more document has been inserted, increment the count.
count++;
if (count >= docsLength) {
// If we have created all documents, we are done. Just set the response.
getContext().getResponse().setBody(count);
} else {
// Create next document.
tryCreate(docs[count], callback);
}
}
}
您可以找到有关DocumentDB数据库端编程(存储过程,触发器和UDF)here的参考文档。