如何使用Azure DocumentDB执行升级？

Question

Azure DocumentDB 不支持更新测试。是否有合理的解决方法来实现相同的功能？

使用检查文档是否存在的存储过程来确定是否应该执行插入或更新是一种有效的策略吗？

如果我需要批量执行数千个这些操作，该怎么办？

在这里投票支持该功能：

http://feedback.azure.com/forums/263030-documentdb/suggestions/7075256-provide-for-upsert

更新——这是我在批量增加存储过程中的尝试。

function bulkImport(docs) { 
    var collection = getContext().getCollection(); 
    var collectionLink = collection.getSelfLink(); 
    var count = 0; 

    if (!docs) throw new Error('Docs parameter is null'); 

    var docsLength = docs.length; 
    if (docsLength == 0) { 
        getContext().getResponse().setBody(0); 
    } 

    tryUpsert(docs[count], callback); 

    function tryUpsert(doc, callback) {

        var query = { query: ""select * from root r where r.id = @id"", parameters: [ {name: ""@id"", value: doc.id}]};

        var isAccepted = collection.queryDocuments(collectionLink, query, function(err, resources, options) {
            if (err) throw err;                           

            if(resources.length > 0) {
                // Perform a replace       
                var isAccepted = collection.replaceDocument(resources[0]._self, doc, callback);     
                if (!isAccepted) getContext().getResponse().setBody(count);                          
            }
            else {
                // Perform a create
                var isAccepted = collection.createDocument(collectionLink, doc, callback);   
                if (!isAccepted) getContext().getResponse().setBody(count);                             
            }
        });  

        if (!isAccepted) getContext().getResponse().setBody(count); 
    }

    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. 
            tryUpsert(docs[count], callback); 
        } 
    } 
} 

Answer 1

更新(2015-10-06):现在Azure DocumentDB支持Atomic upsert。

是的，存储过程对upsert非常有用。

文档数据库的 Github 上甚至还有代码示例：

>

Upsert（针对插入优化）：https://github.com/aliuy/azure-node-samples/blob/master/documentdb-server-side-js/stored-procedures/upsert.js

Upsert（针对替换优化）：https://github.com/aliuy/azure-node-samples/blob/master/documentdb-server-side-js/stored-procedures/upsertOptimizedForReplace.js

批量导入/更新：https://github.com/Azure/azure-documentdb-hadoop/blob/master/src/BulkImportScript.js