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Error connecting to mongoDB using Mongolite


Error connecting to mongoDB using Mongolite

By : user2172493
Date : October 23 2020, 08:10 PM
Hope that helps As the message says, there is a mismatch between versions of the client and the server.
More precisely, mongolite relies on a more general driver written in C, libmongoc, and it seems the version automatically installed by the install.packages("mongolite") statement is too recent towards the server's version.
code :


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what is used to write functions within mongoDB/mongolite?

what is used to write functions within mongoDB/mongolite?


By : Satya Prakash
Date : March 29 2020, 07:55 AM
will be helpful for those in need The R language allows you to create environments where you put functions that are then referenced with the $-operator as one would pull items from a list. So the m$mapreduce is calling an R function and sending that text to the database engine: http://docs.mongodb.org/manual/reference/command/mapReduce/ If you install the package and execute help(pac=mongolite) you will see that the package has a single exposed function, mongo that allows any of those function calls. You can then work through the examples on the help page and the vignette.
(Note: you will get an error if you do not first install and set up the database executable.)
code :
ls(envir=environment(mongo))
[14] "mongo_collection_aggregate"       
[15] "mongo_collection_command"         
[16] "mongo_collection_command_simple"  
[17] "mongo_collection_count"           
[18] "mongo_collection_create_index"    
[19] "mongo_collection_distinct"        
[20] "mongo_collection_drop"            
[21] "mongo_collection_drop_index"      
[22] "mongo_collection_find"            
[23] "mongo_collection_find_indexes"    
[24] "mongo_collection_insert_bson"     
[25] "mongo_collection_insert_page"     
[26] "mongo_collection_mapreduce"       
[27] "mongo_collection_name"            
[28] "mongo_collection_new"             
[29] "mongo_collection_remove"          
[30] "mongo_collection_rename"          
[31] "mongo_collection_stats"           
[32] "mongo_collection_update"     
R : Querying MongoDB by timestamp (using mongolite)

R : Querying MongoDB by timestamp (using mongolite)


By : Anisa Kifli
Date : March 29 2020, 07:55 AM
like below fixes the issue I have a sizeable Mongo database that is indexed based on timestamp. Each timestamp in the database is structured in the following way: , You need to convert the date into a numberLong, and query on that
code :
d <- as.integer(Sys.time()) * 1000

rawData <- mong$find(paste0('{"timestamp":{"$gte": { "$date" : { "$numberLong" : "', d, '" } } } }'))
Unordered insert into Mongodb using mongolite

Unordered insert into Mongodb using mongolite


By : Pamidi Ramesh
Date : March 29 2020, 07:55 AM
I hope this helps you . The mongo shell converts multiple insert statements into a bulk insert operation, which is where the ordered vs unordered behaviour applies. The Bulk API was introduced in MongoDB 2.6; older versions of MongoDB had a batch insert API which had an option to "continue on error" that defaulted to false.
The mongolite R package builds on the officially supported libmongoc driver, but as at mongolite 1.2 does not properly expose an option to control the behaviour of bulk inserts. However, the underlying mongolite C functions do have a stop_on_error boolean (default: TRUE) which maps to ordered vs unordered inserts.
code :
coll$insert(data, stop_on_error = FALSE)
Mongolite: How to insert Date in mongodb using r

Mongolite: How to insert Date in mongodb using r


By : Kent
Date : March 29 2020, 07:55 AM
hope this fix your issue Hi I'm trying insert date but it is only taking as string. , To insert date in mongodb using rmongolite package use $date.
code :
mongo$update(query = paste0('{"_id": ', c, ' }'),  
update = paste0('{"$addToSet":  
{"values":{date_data":{"$date":"',dat,'"} } }  
'))
R : Updating an entry in mongodb using mongolite

R : Updating an entry in mongodb using mongolite


By : jastubbs
Date : March 29 2020, 07:55 AM
may help you . the mongo$update() function takes a query and a update argument. You use the query to find the data you want to update, and the update to tell it which field to update.
Consider this example
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