mongodb data modeling tool

Tags: mongodb solr search engineThe following program uses SOLR as the search module, and the first step in searching for the key is to create an index. The generation of indexes we generally use the data in the database as the data source. But the data in the database is constantly changing, the

limit () method to achieve pagination effect Sort sort () is obsoleteNow it's using query.with (sort) Sort method to sort the data, depending on the specified field, and using 1 or-one to specify whether the sort is ascending or descending, similar to the SQL order by. two. Basic Page Pagination The query class provides the ability to limit, skip, sort query restrictions, jumps, and sort orders, and we implement query p

surname classmate Pattern pattern = pattern.compile ("^ Yang *$", pattern.case_insensitive); list 3. Scope Query Scope query is relatively simple, only need to use the Com.mongodb.BasicDBObject objectSpecific as follows:Check a class of students older than or equal to 20 years old /** greater than use: "$GT" greater than or equal to use: "$gte" less than use: " $lt" less than or equal to use: "$lte" is not equal to use: "$ne" other circumstances can go to

; +Objectid.tryparse (Value, outID); theId =ID; - } $ } the } the the Public classmyentity3:myentity the { -[Jsonconverter (typeof(Objectidconverter))] in Public OverrideObjectId Id {Get;Set; } the } the Public classObjectidconverter:jsonconverter About { the Public Override BOOLCanconvert (Type objectType) the { the returnObjectType = =typeof(ObjectId); + } - the Public Override ObjectReadjson