Python MongoDB 插入数据
一个文档在MongoDB中就像是SQL数据库中的一个记录。
插入集合
我们使用insert_one()方法，将记录或文档插入到MongoDB的集合。
insert_one()方法的第一个参数是一个字典，其中包含插入的文档中包含字段名称和值。
实例
在“customers”集合中插入记录：import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
mydict = { "name": "John", "address": "Highway 37" }
x = mycol.insert_one(mydict)
运行实例 »
返回 _id 字段
insert_one()方法返回一个 InsertOneResult 对象，该对象有一个属性inserted_id，该对象包含插入文档的id。
实例
在“customers”集合中插入另一条记录，并返回该_id字段的值 ：
mydict = { "name": "Peter", "address": "Lowstreet 27" }
x = mycol.insert_one(mydict)
print(x.inserted_id)
运行实例 »
_id字段，那么MongoDB将为您添加一个字段并为每个文档分配唯一的ID。
在上面的示例中，_id未指定任何字段，因此MongoDB为记录（文档）分配了唯一的_id。
插入多个文档
要将多个文档插入MongoDB中的集合，我们使用insert_many()方法。
insert_many()方法的第一个参数是一个包含字典的列表，其中包含您要插入的数据：
实例
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
mylist = [
{ "name": "Amy", "address": "Apple st 652"},
{ "name": "Hannah", "address": "Mountain 21"},
{ "name": "Michael", "address": "Valley 345"},
{ "name": "Sandy", "address": "Ocean blvd 2"},
{ "name": "Betty", "address": "Green Grass 1"},
{ "name": "Richard", "address": "Sky st 331"},
{ "name": "Susan", "address": "One way 98"},
{ "name": "Vicky", "address": "Yellow Garden 2"},
{ "name": "Ben", "address": "Park Lane 38"},
{ "name": "William", "address": "Central st 954"},
{ "name": "Chuck", "address": "Main Road 989"},
{ "name": "Viola", "address": "Sideway 1633"}
]
x = mycol.insert_many(mylist)
#print list of the _id values of the inserted documents:
print(x.inserted_ids)
运行实例 »
insert_many()方法返回一个InsertManyResult对象，该对象具有一个属性inserted_ids，用于保存插入文档的ID。
插入多个文档时指定ID
如果您不希望MongoDB为您的文档分配唯一ID，则可以在插入文档时指定_id字段。
请记住，值必须是唯一的。两个文件不能具有相同的_id。
实例
PYTHON标题import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
mylist = [
{ "_id": 1, "name": "John", "address": "Highway 37"},
{ "_id": 2, "name": "Peter", "address": "Lowstreet 27"},
{ "_id": 3, "name": "Amy", "address": "Apple st 652"},
{ "_id": 4, "name": "Hannah", "address": "Mountain 21"},
{ "_id": 5, "name": "Michael", "address": "Valley 345"},
{ "_id": 6, "name": "Sandy", "address": "Ocean blvd 2"},
{ "_id": 7, "name": "Betty", "address": "Green Grass 1"},
{ "_id": 8, "name": "Richard", "address": "Sky st 331"},
{ "_id": 9, "name": "Susan", "address": "One way 98"},
{ "_id": 10, "name": "Vicky", "address": "Yellow Garden 2"},
{ "_id": 11, "name": "Ben", "address": "Park Lane 38"},
{ "_id": 12, "name": "William", "address": "Central st 954"},
{ "_id": 13, "name": "Chuck", "address": "Main Road 989"},
{ "_id": 14, "name": "Viola", "address": "Sideway 1633"}
]
x = mycol.insert_many(mylist)
#print list of the _id values of the inserted documents:
print(x.inserted_ids)
运行实例 »
