标签:blog io for sp cti log on c ad
@DBref文档关联,在按该类型查询的时候,在字段名后加上关联表的字段名即可,如:
Criteria.where("bloggroup.$id"),
$id代表关联表的oid字段。
or和and联合查询
比如查询 (A = 1 and b = 2 )or (A = 3 and b =4),or的数量不确定,
那么采用定义一个Criteria数组,将条件组记入数组中,然后将数组指定给orCriteria方法。
@Override
public List<Blog> find(List<GroupAttention> groupattentions) {
Query query = new Query();
Criteria criteria = new Criteria();
Criteria[] criterialist = new Criteria[groupattentions.size()];
for(int i=0;i<groupattentions.size();i++){
Criteria criteriaand = new Criteria();
criteriaand.andOperator(Criteria.where("bloggroup.$id").is(new ObjectId(groupattentions.get(i).getGroupid())).and("bloglevel").gte(groupattentions.get(i).getGrouplevel()));
criterialist[i] = criteriaand;
}
criteria.orOperator(criterialist);
query.addCriteria(criteria);
return mongoTemplateDataBase.find(query, Blog.class);
}
Spring DATA MongoDB @DBref查询,or和and联合查询
标签:blog io for sp cti log on c ad
原文地址:http://www.cnblogs.com/hsoft/p/3965892.html