spring 如何使用 Springs MongoTemplate 和 Criteria 类检索字段子集
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How do I retrieve a subset of fields using Springs MongoTemplate and Criteria class
提问by JARC
I want to be able to execute the following console command to return all rows with only a subset of fields populated but using Spring's MongoTemplateclass:
我希望能够执行以下控制台命令以返回仅填充了一部分字段但使用 SpringMongoTemplate类的所有行：
Console Command
控制台命令
db.person.find(null,{name:1})
db.person.find(null,{name:1})
MongoTemplate
蒙戈模板
mongoTemplate.find(new Query(...), Person.class)
mongoTemplate.find(new Query(...), Person.class)
Info on subset queries can be found here if you're interested http://www.mongodb.org/display/DOCS/Retrieving+a+Subset+of+Fields
如果您有兴趣，可以在此处找到有关子集查询的信息 http://www.mongodb.org/display/DOCS/Retrieving+a+Subset+of+Fields
Any ideas?
有任何想法吗？
Cheers
干杯
回答by JARC
Query q = new Query();
q.fields().include("name");
mongoTemplate.find(q, Person.class);
回答by dan andrei zaharia
mongoTemplate.getCollection(COLLECTION).find(null, new BasicDBObject(FIELD, "1"))
