Tagged Questions
0
votes
0answers
13 views
Retrive a list of sub documents from MongoDb
I have a model that looks like this
public class Event {
public string Id { get; set; }
public string Name { get; set; }
public List<Person> Attendees { get; set;}
}
public class ...
0
votes
2answers
46 views
MongoDB embedded document indexing issue
I have data in a mongodb collection in the following format:
{
_id: ObjectId,
Product: string,
Modules: [
{
StaticModuleId: Int64,
Set: [
{
...
1
vote
3answers
128 views
Array intersection in MongoDB
Ok there are a couple of things going on here..I have two collections: test and test1. The documents in both collections have an array field (tags and tags1, respectively) that contains some tags. I ...
0
votes
0answers
54 views
How to test that a string field in a MongoDB document is not empty?
I am trying to get the number of documents that have a field with an empty string. This field, lets call it "Field_One" is present in all documents (so, to be clear, I am not trying to find if the ...
1
vote
2answers
658 views
Inheritance in MongoDb: how to request instances of defined type
This is how I used to utilize inheritance in Entity Framework (POCO):
ctx.Anumals // base class instances (all instances)
ctx.Anumals.OfType<Cat> // inherited class Cat's instances only
...
0
votes
1answer
137 views
MongoDb c# Linq query and return a collection's child objects
Say I have a typical customers and orders scenario. I have a collection of customers and each customer document has a list of orders. Now I want to query the customers where the order date is within ...
0
votes
2answers
215 views
MongoDB C# - update using custom strongly-typed objects not allowed?
I am trying to perform an update using strongly-typed objects. For example,
public void setAppointmentPrefs(string UserName, IEnumerable<AppointmentInfo> info)
{
var query = new ...
0
votes
1answer
62 views
Filtering set of images from MongoDB
I have written some codes to store image files in MongoDB. Now I want to filter and retrieve some images from the mongoDB. I want to filter out some images which has some set of characters on the ...
0
votes
1answer
28 views
How to get a number of documents starting by a certain document in mongodb
Let's say, in mongo db, I have a collection like this:
{_id: "A", Value: "1"}
{_id: "B", Value: "2"}
{_id: "C", Value: "3"}
{_id: "D", Value: "4"}
{_id: "E", Value: "5"}
{_id: "F", Value: "6"}
{_id: ...
0
votes
2answers
265 views
MongoDB C# Remove doesn't work
i have this code for removing an item froma a mongofb collation
private MongoCollection<T> GetCollection()
{
connectionString = "mongodb://localhost/?safe=true";
server = ...
0
votes
1answer
431 views
Redirect output of mongo query to a csv file
I am using MongoDB 2.2.2 for 32-bit Windows7 machine. I have a complex aggregation query in a .js file. I need to execute this file on the shell and direct the output to a CSV file. I ensure that the ...
1
vote
2answers
140 views
MongoDB embedded document delete
I have been doing experiments on MongoDB. Collection are as follows(sample).
Project this, in this class of 95th DeleteAlbum line have the function of.
{
"_id": {
"$oid": ...
1
vote
1answer
84 views
Handling MongoDB schema changes
How do you deal with schema changes in production?
Let's say i'm tampering with some classes in my C# project, adding a complicated property which consists of a Dictionary (Key(UInt16),Value(UInt16)) ...
0
votes
0answers
122 views
Join multiple collections on multiple keys using map reduce in Mongo DB.
I know a way to join multiple collections using a same key, and I thinks its not possible to join multiple collections on multiple keys but wondering anyone know a way to do it.
Lets say I have a ...
0
votes
0answers
97 views
MongoDB C# driver crash on First() call
I am having issues with the latest MongoDB C# driver (v1.4.2.4500) crashing when I query this document:
{
"_id" : "4fdfe705b48c6b24dcab994a",
"CreatedDate" : new Date("6/18/2012 19:42:13"),
...
0
votes
1answer
1k views
Updating a single element in a nested list with official C# MongoDB driver
I have a simple game with multiple rounds and I want to update the most recent round:
class Game
{
public ObjectId Id { get; set; }
public List<Round> Rounds { get; set; }
}
class ...
0
votes
1answer
148 views
How to query for multiple results in mongoDB
If I want to find documents for more than one query parameter(sorry if not using correct wording), how do I do this?
i am using the c# driver.
Example
I want to find documents for both provider1 and ...
1
vote
1answer
988 views
How to query a sub document collection using MongoDB and C# driver
I have the following structure:
public class ThreadDocument
{
public ThreadDocument()
{
Messages = new List<Message>();
Recipients = new List<Recipient>();
}
...
