为什么我不能使用mongoTemplate.remove删除数据

Question

I've used java spring-boot version 1.5.14.RELEASE and spring-data-mongodb version is 1.10.13-RELEASE . I am trying to do data archiving.

I'll find the data in master MongoDB by beginId and endId , then synchronize data into other libraries, finally, I'll delete main library data by beginId and endId .

public int del(ObjectId beginId, ObjectId endId, String collectionName) {

    Criteria criteria = getCriteria(beginId, endId);
    WriteResult writeResult = mongoTemplate.remove(Query.query(criteria), collectionName);
    return writeResult.getN();
}

private Criteria getCriteria(ObjectId beginId, ObjectId endId) {
    Date endDate = DateUils.getDayEnd(endId.getDate());
    Criteria criteria = Criteria.where("_id").lte(endId);
    if (beginId != null) {
      criteria.gte(beginId);
    }
    criteria.and("updateTime").lte(endDate);
    return criteria;
}

Occasionally, data deletion fails, causing DuplicateKeyException on the next backup.

Answer 1

Instead of using static Criteria function, use Criteria class object as:

private Criteria getCriteria(ObjectId beginId, ObjectId endId) {
    Date endDate = DateUils.getDayEnd(endId.getDate());
    Criteria criteria = new Criteria();        
    if (beginId != null) {
      criteria.and("_id").lte(endId).gte(beginId);
    } else {
      criteria.and("_id").lte(endId);
    }
    criteria.and("updateTime").lte(endDate);
    return criteria;
}