Python MongoDB 插入文档
MongoDB 中的文档与 SQL 数据库中的记录相同。
插入到集合
要将记录（在 MongoDB 中称为文档）插入到集合中，我们使用insert_one()方法。
insert_one()方法的第一个参数是包含要插入的文档中每个字段的名称和值的字典。
示例
在 "customers" 集合中插入一条记录
import pymongo
myclient = pymongo.MongoClient("mongodb://127.0.0.1:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
mydict = { "name": "John", "address": "Highway 37" }
x = mycol.insert_one(mydict)
运行示例 »
返回 _id 字段
insert_one()方法返回一个 InsertOneResult 对象，该对象具有一个属性inserted_id，它保存插入的文档的 ID。
示例
在 "customers" 集合中插入另一条记录，并返回_id字段的值
mydict = { "name": "Peter", "address": "Lowstreet 27" }
x = mycol.insert_one(mydict)
print(x.inserted_id)
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如果您没有指定_id字段，则 MongoDB 会为您添加一个，并为每个文档分配一个唯一的 ID。
在上面的示例中，没有指定_id字段，因此 MongoDB 为该记录（文档）分配了一个唯一的 _id。
插入多个文档
要将多个文档插入到 MongoDB 的集合中，我们使用insert_many()方法。
insert_many()方法的第一个参数是一个列表，包含您想要插入的数据的字典
示例
import pymongo
myclient = pymongo.MongoClient("mongodb://127.0.0.1:27017/")
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)
# 打印插入文档的 _id 值列表
print(x.inserted_ids)
运行示例 »
The insert_many() method returns a InsertManyResult object, which has a property, inserted_ids, that holds the ids of the inserted documents.
插入多个文档，并指定 ID
如果您不想让 MongoDB 为您的文档分配唯一 ID，您可以在插入文档时指定 _id 字段。
请记住，这些值必须是唯一的。两个文档不能具有相同的 _id。
示例
import pymongo
myclient = pymongo.MongoClient("mongodb://127.0.0.1:27017/")
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)
# 打印插入文档的 _id 值列表
print(x.inserted_ids)
运行示例 »
