如何在 spring 数据 MongoDB 中使用 $where？

Question

I am not able to use $where in SpringDataMongoDb .

Is there any way to achieve this in SpringBoot ?

db.getCollection('my_collection').find({ $where : function(){
    for (var key in this.action_status){
        return this.action_status[key] == false;
    }
}})

Thank You.

Answer 1

1: You can create a repository that extends MongoRepository and have a JSON Query method as follows:

@Query("{'action_status':{$eq:?0}}")
public List<YourObj> findByActionStatus(boolean status);

2: You can use Query By Object Attribute in MongoRepository. Supposedly you have a field called "isActionStatus" in your object, just declare this method in your repository:

public List<YourObj> findByIsActionStatus(boolean actionStatus);

Spring Data will break the method name like "select * from... where isActionStatus = actionStatus

If you need a more complex query you can find the supported keywords here: https://docs.spring.io/spring-data/mongodb/docs/1.2.0.RELEASE/reference/html/mongo.repositories.html

Answer 2

It can be implemented in two ways one is using MongoTemplate and criteria query in spring boot application

Query query = new Query();
query.addCriteria(Criteria.where("action_status").eq(false));
List<User> users = mongoTemplate.find(query,MyCollectionClassName.class);

Another way is using mongo repository

@Query("SELECT mc FROM my_collection mc WHERE mc.status = false")
MyCollectionClassName findMyCollectionClassNameByStatus(Integer status);

References:

https://www.baeldung.com/queries-in-spring-data-mongodb
https://www.baeldung.com/spring-data-jpa-query