java - 如何对 mongodb 数组字段进行全文搜索？

Question

嗨，我的 Mongo 数据库字段如下:

        "_id" : ObjectId("51d582be7a8d51bd29ca78a3"),
        "Filename" : "sample.pdfe",
        "Title" : null,
        "Author" : null,
        "ContentType" : "application/x-msdownload; format=pe32",
        "url" : "Z:sample.pdf",
        "Keywords" : ["php","java",".net","python"]

下面是我对索引字段进行全文搜索的代码

m = new Mongo("10.0.0.26", 27017);
DB db = m.getDB("soft") ;
DBCollection col = db.getCollection("metadatanew") ;
String collection = col.toString();
DBObject searchCmd = new BasicDBObject();
searchCmd.put("text", collection); 
searchCmd.put("search", name); 

CommandResult commandResult = db.command(searchCmd);

BasicDBList results = (BasicDBList)commandResult.get("results");

for (Iterator <Object> it = results.iterator();it.hasNext();)
{
    BasicDBObject result  = (BasicDBObject) it.next();
    BasicDBObject dbo = (BasicDBObject) result.get("obj");
    System.out.println(dbo.getString("Filename"));
}

我使用以下命令在两个字段上创建文本索引:

db.metadatanew.ensureIndex({'Filename':"text"}, {'Keywords':"text"})

我已经为文件名和关键字创建了文本索引，但我只能对文件名进行全文搜索，我的代码有什么问题吗，请帮助我

Answer 1

ensureIndex 函数的第二个参数是选项。您应该在两个字段上创建一个唯一索引:

db.metadatanew.ensureIndex( { "Keywords" : "text", "Filename" : "text"} )

查看更多:

http://docs.mongodb.org/manual/tutorial/create-text-index-on-multiple-fields/