MongoDB的简单使用

使用python向集合test中插入1000条文档,文档包含_id和name
  _id的值为0,1,2,3,...999
  name的值为py0,py2,py4,py6,py8..
　查询显示出_id为100整数的倍数的文档, 如100,200,300

from pymongo import MongoClient
client = MongoClient()
collection = client['neusoft']['test']
l = [{'_id':i,"name":'py{}'.format(i*2)} for i in range(1000)]
collection.insert_many(l)
c = collection.find()
for i in c:
    if i['_id'] % 100 == 0 and i['_id'] != 0:
        print(i)
client.close()

终端可使用：

db.test.find({$where:function(){
return this._id % 100 == 0 && this._id != 0
}})