Question

是否可以选择特定索引的文档？

我有一个文档导入过程，我从我的数据源获取一个项目页面（一次250个项目）然后我将这些项目同时导入到DocumentDB中。假设我在将这些项插入DocumentDB时出错，我不确定哪些项目或项目失败。（我可以解决它，但不想）。再次从页面中突出显示所有项目会更容易。

我插入的项目具有升序ID。因此，如果我查询DocumentDB（按id排序）并选择位置的id（所有Id＆＃39; s的页数），我可以再次从该点开始导入。

我知道SKIP没有实现，我想检查是否还有其他选项？

Answer 1

您可以尝试批量导入存储过程。下面的sproc创建代码来自Azure's github repo。如果sproc超时，此sproc将报告批处理中创建的文档数并继续尝试创建多个文档。

由于sproc是ACID，如果抛出任何异常，则必须从头开始（或最后一个成功批处理）重试。如果您只想在抛出任何异常时重试整个批处理过程，也可以将createDocument函数更改为upsertDocument。

{
    id: "bulkImportSproc",
    body: 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);
            return;
        }

        // 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);
            }
        }
    }
}

DocumentDB选择特定索引处的文档

1 个答案: