Menu
com.mongodb.CommandFailureException: { "serverUsed" : "localhost:27017" , "createdCollectionAutomatically" : true , "numIndexesBefore" : 1 , "ok" : 0.0 , "errmsg" : "namespace name generated from index name \"NDS.ABCD_pre_import.$importabilityEvaluations.perNameResults.straightImportResults.resultPolContent_NOT_IN_CURRENT_USE.officialPolResultNameContentId\" is too long (127 byte max)" , "code" : 67}
at com.mongodb.CommandResult.getException(CommandResult.java:76)
at com.mongodb.CommandResult.throwOnError(CommandResult.java:131)
at com.mongodb.DBCollectionImpl.createIndex(DBCollectionImpl.java:362)
at com.mongodb.DBCollection.createIndex(DBCollection.java:563)
at org.springframework.data.mongodb.core.index.MongoPersistentEntityIndexCreator.createIndex(MongoPersistentEntityIndexCreator.java:136)
at org.springframework.data.mongodb.core.index.MongoPersistentEntityIndexCreator.checkForAndCreateIndexes(MongoPersistentEntityIndexCreator.java:129)
at org.springframework.data.mongodb.core.index.MongoPersistentEntityIndexCreator.checkForIndexes(MongoPersistentEntityIndexCreator.java:121)
at org.springframework.data.mongodb.core.index.MongoPersistentEntityIndexCreator.onApplicationEvent(MongoPersistentEntityIndexCreator.java:105)
at org.springframework.data.mongodb.core.index.MongoMappingEventPublisher.publishEvent(MongoMappingEventPublisher.java:60)
at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:306)
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:180)
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:140)
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:67)
at org.springframework.data.mongodb.core.MongoTemplate.determineCollectionName(MongoTemplate.java:1881)
at org.springframework.data.mongodb.core.MongoTemplate.determineEntityCollectionName(MongoTemplate.java:1868)
at org.springframework.data.mongodb.core.MongoTemplate.save(MongoTemplate.java:825)
596
Creating an Index in MongoDB is done by using the “createIndex” method.
Create an Index : Along with the default index, we can create indexes on our own using the createIndex() method. This method creates one or more indexes on the specified collections.
The db. collection. reIndex() drops all indexes on a collection and recreates them. This operation may be expensive for collections that have a large amount of data and/or a large number of indexes.
Generally, MongoDB only uses one index to fulfill most queries. However, each clause of an $or query may use a different index, and in addition, MongoDB can use an intersection of multiple indexes.
You can pass an index name as parameter to ensureIndex:
db.collection.ensureIndex({"birds.parrots.macaw.blue.id": 1}, {name:"myIndex1"});
db.collection.ensureIndex({"birds.parrots.macaw.blue.id": 1, "field2": 1}, {name:"myIndex1"});
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
