Spring Data or Mongo inserting data when collection is empty

[howler9443]

Hello everyone,

I'm not sure if this is something that I am doing wrong or if its Spring Data or Mongo.

I'm writing an app using Spring MVC, Spring Data and MongoDB. When my view requests data via ajax (jQuery) to load a grid, I am expecting no data in my grid when the collection is empty. However, it seems that data is somehow being inserted into the collection. As though its being generated just to fulfill my request.

Does anyone know if this is normal behavior? If so, could someone please point me to the correct documentation so that I can get this resolved. I really just want to understand whats happening and why.

Here is a sample of what is inserted.

> db.client.find();
{ "_id" : ObjectId("4f8ede0ba880e70ea03fb9d7"), "_class" : "com.wbc.model.Client", "lastName" : "lastName_0", "firstName"
: "firstName_0", "middleName" : "middleName_0", "dateOfBirth" : ISODate("2012-04-18T15:43:11Z"), "driversLicenseNbr" : "driversLicen
seNbr_0" }
{ "_id" : ObjectId("4f8ede0ba880e70ea03fb9d8"), "_class" : "com.wbc.model.Client", "lastName" : "lastName_1", "firstName"
: "firstName_1", "middleName" : "middleName_1", "dateOfBirth" : ISODate("2012-04-18T15:40:50Z"), "driversLicenseNbr" : "driversLicen
seNbr_1" }
{ "_id" : ObjectId("4f8ede0ba880e70ea03fb9d9"), "_class" : "com.wbc.model.Client", "lastName" : "lastName_2", "firstName"
: "firstName_2", "middleName" : "middleName_2", "dateOfBirth" : ISODate("2012-04-18T15:32:12Z"), "driversLicenseNbr" : "driversLicen
seNbr_2" }
{ "_id" : ObjectId("4f8ede0ba880e70ea03fb9da"), "_class" : "com.wbc.model.Client", "lastName" : "lastName_3", "firstName"
: "firstName_3", "middleName" : "middleName_3", "dateOfBirth" : ISODate("2012-04-18T15:36:04Z"), "driversLicenseNbr" : "driversLicen
seNbr_3" }
{ "_id" : ObjectId("4f8ede0ba880e70ea03fb9db"), "_class" : "com.wbc.model.Client", "lastName" : "lastName_4", "firstName"
: "firstName_4", "middleName" : "middleName_4", "dateOfBirth" : ISODate("2012-04-18T15:39:01Z"), "driversLicenseNbr" : "driversLicen
seNbr_4" }
{ "_id" : ObjectId("4f8ede0ba880e70ea03fb9dc"), "_class" : "com.wbc.model.Client", "lastName" : "lastName_5", "firstName"
: "firstName_5", "middleName" : "middleName_5", "dateOfBirth" : ISODate("2012-04-18T15:31:55Z"), "driversLicenseNbr" : "driversLicen
seNbr_5" }
{ "_id" : ObjectId("4f8ede0ba880e70ea03fb9dd"), "_class" : "com.wbc.model.Client", "lastName" : "lastName_6", "firstName"
: "firstName_6", "middleName" : "middleName_6", "dateOfBirth" : ISODate("2012-04-18T15:45:30Z"), "driversLicenseNbr" : "driversLicen
seNbr_6" }
{ "_id" : ObjectId("4f8ede0ba880e70ea03fb9df"), "_class" : "com.wbc.model.Client", "lastName" : "lastName_8", "firstName"
: "firstName_8", "middleName" : "middleName_8", "dateOfBirth" : ISODate("2012-04-18T15:32:45Z"), "driversLicenseNbr" : "driversLicen
seNbr_8" }
{ "_id" : ObjectId("4f8ede0ba880e70ea03fb9e0"), "_class" : "com.wbc.model.Client", "lastName" : "lastName_9", "firstName"
: "firstName_9", "middleName" : "middleName_9", "dateOfBirth" : ISODate("2012-04-18T15:39:03Z"), "driversLicenseNbr" : "driversLicen
seNbr_9" }
{ "_id" : ObjectId("4f8ede0ca880e70ea03fb9e1"), "_class" : "com.wbc.model.Client", "lastName" : "lastName_2147483647", "fi
rstName" : "firstName_2147483647", "middleName" : "middleName_2147483647", "dateOfBirth" : ISODate("2012-04-18T15:37:22Z"), "drivers
LicenseNbr" : "driversLicenseNbr_2147483647" }

Thanks,
John

[Oliver Gierke]

Well it seems you're having code somewhere that does the insertions or the collection simply contains that data upfront. You could try declaring a subclass of AbstractMongoEventListener, override onBeforeSave(…) and have a break point in there to see where the call is originally coming from. If that doesn't get triggered the data is simply present int the collection and you might wanna wipe that one out then.

[howler9443]

Thanks Oliver, when I get home from work today, I'll give that a shot. I'm not pre-initializing things. I wonder if it could be because I extend the PagingAndSortingRepository, and that the collection was created when the application was started. I'll take a look tonight.

Thanks again
John

[howler9443]

Oliver,
Sorry for the delay. But I e been trying to reproduce the issue without success. I will keep an eye on the app and see if it occurs again. Thanks again for your help.