spring-data-mongodb

问题 I want to add where condition to all repository fetching methods for not viewing deleted items. In Spring JPA it's possible to add @Where annotation to Entity. But for Spring Data MongoDB AFAIK it's not possible. Tried Mongodb lifecycle events but not succeeded. Is there a way of modifying repository queries before execution. 回答1: Can you explain what do you mean with "viewing deleted items"? If you want, you can use MongoTemplate and write your own repository and so can add desired where

问题 I Am trying to find all from a collection that match certain search criteria using MongoRepository using the following method: <S extends T> Page<S> findAll(Example<S> example, Pageable pageable); To do this I am building an ExampleMatcher for all fields that are included in the search. like so: private ExampleMatcher buildMatcher(FormSearchParameters formSearchParameters) { ExampleMatcher exampleMatcher = ExampleMatcher.matching() .withIgnorePaths("f1", "f2", "f3", "f4" , "f5"); if (

问题 In spring data mongodb using mongotemplate or mongorepository, how to achieve pagination for aggregateion 回答1: In addition to ssouris solution you can use Pageable classes for the results. public Page<UserListItemView> list(final Pageable pageable) { final Aggregation agg = newAggregation( skip(pageable.getPageNumber() * pageable.getPageSize()), limit(pageable.getPageSize()) ); final List<UserListItemView> results = mongoTemplate .aggregate(agg, User.class, UserListItemView.class)

问题 Using mongoTemplate.find() , I specify a Query with which I can call .limit() or .sort() : .limit() returns a Query object .sort() returns a Sort object Given this, I can say Query().limit(int).sort(), but this does not perform the desired operation, it merely sorts a limited result set. I cannot call Query().sort().limit(int) either since .sort() returns a Sort() So using Spring Data, how do I perform the following as shown in the mongoDB shell? Maybe there's a way to pass a raw query that I

问题 I am saving my document in MongoDb and using save method with class,collection name param. All the methods of save and insert are void return type. then how i can know that my document was saved or not. Is it that i have to re-query to check whether my document was saved. I just need any return value to see if it was saved. Moreover i am using Spring Data for Mongo to do operations. 回答1: It depends on what WriteConcern are you using. If you use WriteConcern.ACKNOWLEDGED , the operation will

问题 I have those items in my MongoDB collection: {x: 1, y: 60, z:100} {x: 1, y: 60, z:100} {x: 1, y: 60, z:100} {x: 2, y: 60, z:100} {x: 2, y: 60, z:100} {x: 3, y: 60, z:100} {x: 4, y: 60, z:100} {x: 4, y: 60, z:100} {x: 5, y: 60, z:100} {x: 6, y: 60, z:100} {x: 6, y: 60, z:100} {x: 6, y: 60, z:100} {x: 7, y: 60, z:100} {x: 7, y: 60, z:100} I want to query the distinct values of x (i.e. [1, 2, 3, 4, 5, 6, 7] ) ... but I only want a part of them (similar to what we can obtain with skip(a) and

问题 From Java driver, I want to save a document that looks like below json in MongoDb { "ts" : Timestamp(1421006159, 4)} Options I tried. Option 1: Map doc= new HashMap(1); doc.put("ts", new BSONTimeStamp()); It results in the below not required format {"ts" : { "_inc" : 0, "_class" : "org.bson.types.BSONTimestamp" }} Option 2: doc.put("ts",new Timestamp(new Date().getTime())); it results in : {"ts" : ISODate("2015-01-12T05:36:43.343Z")} 回答1: I used the following with the default mongodb-java

问题 To create an index for a collection (as documented here https://docs.spring.io/spring-data/mongodb/docs/current/reference/html/) one can use something like the following: mongoTemplate.indexOps(Person.class).ensureIndex(new Index().on("name",Order.ASCENDING)); But where in the program should I place this code snippet? In the relevant repository's constructor? I've did it like that now and it works, but I somehow feel like it is bad design. Somewhere in Mongo configuration? I haven't found a

问题 I'm studying Spring Data MongoDB with a tutorial (https://spring.io/guides/tutorials/data/2/). In this tutorial, the type of cost is BigDecimal as following and it is stored as a "string" in MongoDB. So, when I tried to get a sort result with an ascending sort by the cost field, I got a wrong result. I found that using the BigDecimal class is the best way for calculations. But, if I save numbers as a BigDecimal type with Spring Data MongoDB in MongoDB, it will be saved as a string type and I

问题 I am using spring boot 1.3.1.Release with Spring Data Mongodb and want to setup field naming strategy for fields. Below is my application.properties file: spring.data.mongodb.uri=mongodb://localhost/test spring.data.mongodb.field-naming-strategy=org.springframework.data.mongodb.core.mapping.SnakeCaseFieldNamingStrategy spring.data.mongodb.repositories.enabled=true spring.data.mongodb.database=test Everything is working fine except the field naming strategy. Any help will be highly appreciated