如何在spring中的mongoDB中查询过滤

Question

I want to search my recipes by tags that are array of Strings and want to filter by tags

I know it will be

db.Recipe.find({$and:[{tags:"Desert"},{tags:"low-fat"}]}).pretty()

but I do not know how to write the query in java spring to be flexible flexible means numbers of filtered options can be vary

Answer 1

Autowired the MongoTemplate

@Autowired
MongoTemplate mongoTemplate;

Then use your filter inside the andOperator()

public void somemethod(){
    Query query=Query.query( new Criteria().andOperator(
        Criteria.where("tags").is("Desert"),
        Criteria.where("anotherFilter").is("answer"),
        // write more filter
        )
    );

    List<Recipe> =mongoTemplate.find(query,Recipe.class);
    // do your stuffs
}

Answer 2

we can get the list of tags from client then search it by that tags

@GetMapping("/recipe/searchByTags/{tags}")

public List<Recipe> getRecipesByTags(@PathVariable List<String> tags){
    Query query =  Query.query(
            Criteria.where("tags").all(tags)
    );
    return  mongoTemplate.find(query,Recipe.class);

}