public void GetMongoDBData()
{
var mongo = new Mongo();
mongo.Connect();
//Get the blog database. If it doesn't exist, that's ok because MongoDB will create it
//for us when we first use it. Awesome!!!
var db = mongo.GetDatabase("blog");
//Get the Post collection. By default, we'll use
//the name of the class as the collection name. Again,
//if it doesn't exist, MongoDB will create it when we first use it.
var collection = db.GetCollection<Post>();
//this deletes everything out of the collection so we can run this over and over again.
collection.Remove(p => true);
//Create a Post to enter into the database.
var post = new Post()
{
Title = "My First Post",
Body = "This isn't a very long post.",
CharCount = 27,
Comments = new List<Comment>
{
{ new Comment() { TimePosted = new DateTime(2010,1,1),
Email = "*****@*****.**",
Body = "This article is too short!" } },
{ new Comment() { TimePosted = new DateTime(2010,1,2),
Email = "*****@*****.**",
Body = "I agree with Bob." } }
}
};
collection.Save(post);
}
// public void testMapReduce(){//插入测试数据
//Mongo _db = new Mongo( "127.0.0.1" ).getDB( "jmrtest" );
//DBCollection c = _db.getCollection( "jmr" );
// c.drop();
// c.save( new BasicDBObject( "x" , new String[]{ "a" , "b" } ) );
// c.save( new BasicDBObject( "x" , new String[]{ "b" , "c" } ) );
// c.save( new BasicDBObject( "x" , new String[]{ "c" , "d" } ) );
// MapReduceOutput out =
// c.mapReduce( "function(){ " +
// "for( var i=0; i<this.x.length; i++ )" +
// "{ emit(this.x[i] , 1 ); } }",//map函数内使用this来操作当前行表示的对象，并且使用emit(key,value)方法来向reduce提供参数：
// "function(key,values){" +
// " var sum=0; " +
// "for( var i=0; i<values.length; i++ )" +
// " sum += values[i];" +
// " return sum;}" ,//reduce的key就是emit(key,value)的key，value_array是同个key对应的多个value数组：
// "result" , null );//mapReduce 方法2.x以后和1.X不同
// Map<String,Integer> m = new HashMap<String,Integer>();
// for (DBObject element : out.results()) {
// System.out.println(element.get("value"));
// }
// for ( DBObject r : out.results() ){
// System.out.println( ((Number)(r.get( "value" ))).intValue());
// m.put( r.get( "_id" ).toString() , ((Number)(r.get( "value" ))).intValue() );
// }
// System.out.println(m.size());
// assertEquals( 4 , m.size() );
// assertEquals( 1 , m.get( "a" ).intValue() );
// assertEquals( 2 , m.get( "b" ).intValue() );
// assertEquals( 2 , m.get( "c" ).intValue() );
// assertEquals( 1 , m.get( "d" ).intValue() );
//}
private static void CreatePosts(IMongoCollection<Post> collection)
{
var post = new Post()
{
Title = "My First Post",
Body = "This isn't a very long post.",
CharCount = 27,
Comments = new List<Comment>
{
{ new Comment() { TimePosted = new DateTime(2010,1,1), Email = "*****@*****.**", Body = "This article is too short!" } },
{ new Comment() { TimePosted = new DateTime(2010,1,2), Email = "*****@*****.**", Body = "I agree with Bob." } }
}
};
//Save the post. This will perform an upsert. As in, if the post already exists, update it, otherwise insert it.
collection.Save(post);
//Get the first post that is not matching correctly...
post = collection.Linq().First(x => x.CharCount != x.Body.Length);
post.CharCount = post.Body.Length;
//this will perform an update this time because we have already inserted it.
collection.Save(post);
post = new Post()
{
Title = "My Second Post",
Body = "This still isn't a very long post.",
CharCount = 34,
Comments = new List<Comment>
{
{ new Comment() { TimePosted = new DateTime(2010,1,1), Email = "*****@*****.**", Body = "This isn't any better" } },
}
};
//Save the post. This will perform an upsert. As in, if the post already exists, update it, otherwise insert it.
collection.Save(post);
post = new Post()
{
Title = "My Third Post",
Body = "Ok, fine. I'm writing a longer post so that Bob will leave me alone.",
CharCount = 69,
Comments = new List<Comment>
{
{ new Comment() { TimePosted = new DateTime(2010,1,1), Email = "*****@*****.**", Body = "Yeah, well, you are a terrible blogger." } },
}
};
//Save the post. This will perform an upsert. As in, if the post already exists, update it, otherwise insert it.
collection.Save(post);
}
