Question

我在MongoDB 3.2中有这个文档。我无法更新我的嵌套数组文档

StringBuilder sb = new StringBuilder();
        BufferedReader br = request.getReader();
        String str = null;
        while ((str = br.readLine()) != null) {
            sb.append(str);
        }
        JSONObject jObj = new JSONObject(sb.toString());
        ObjectId _id = new ObjectId(jObj.getString("_id"));
        boolean value = jObj.getBoolean("value");
        String mode = jObj.getString("mode");
        String verifiedBy = jObj.getString("verifiedBy");

        InputStream input = getServletContext().getResourceAsStream("/WEB-INF/config/config.properties");
        Properties properties = new Properties();
        properties.load(input);
        String host = properties.getProperty("host");
        int port = Integer.parseInt(properties.getProperty("port"));
        MongoClient mongoClient = new MongoClient(host, port);
        MongoDatabase db = mongoClient.getDatabase("admin");

        MongoCollection<Document> coll = db.getCollection("students");
        Bson where = new Document().append("_id", _id);
        Bson update = new Document()
                .append("profile.verification[0].provost", value)
                .append("profile.verification[0].verifiedBy", verifiedBy)
                .append("profile.verification[0].verifiedOn", new Date());
        Bson set = new Document().append("$set", update);
        try {
            coll.updateOne(where, set, new UpdateOptions().upsert(true));
            List<Document> documents = (List<Document>) coll.find(where).into(new ArrayList<Document>());
            JSON json = new JSON();
            String serialize = json.serialize(documents);
            response.getWriter().write(serialize);
        } catch (MongoWriteException e) {
            JSONObject json = new JSONObject();
            json.append("success", false);
            json.append("class", "alert alert-success col-sm-8");
            json.append("message", "Something went wrong");
            String res = json.toString();
            response.getWriter().write(res);
        }

我想像这样更新

profile.verification[0].provost = true

没有错误，但def multiply_number_in_context(match): return "{0}{1}{2}".format(match.group(1), str(float(match.group(2))*3), '"') editor.rereplace(r'("StackSize" Value=")(\d+)"', multiply_number_in_context)由于某种原因没有更新。

任何指针都会受到赞赏。

Answer 1

您需要将数组元素作为profile.verification.0.provost等访问，而不是[0]。您在自己的示例中看到效果，因为您添加了子文档＆＃34;验证[0]＆＃34;在个人资料部分的末尾。

使用java驱动程序3.2在MongoDB中更新嵌套的嵌入式数组文档

1 个答案: