Python MongoDB 插入文档

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  插入文档

  要将记录或在MongoDB中调用的文档插入集合，我们使用 insert_one()方法。insert_one()方法的第一个参数是一个字典，其中包含要插入的文档中每个字段的名称和值。

  在“customers”集合中插入一条记录：

  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)
  

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  返回_id字段

  insert_one()方法返回一个InsertOneResult对象，该对象具有属性inserted_id，其中包含插入的文档的ID。

  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)
  

  如果您未指定_id字段，则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，未指定_id字段，因此MongoDB为记录（文档）分配了唯一的_id。
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  插入多个文件

  要将多个文档插入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包含字典的列表，其中包含要插入的数据：

  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)
  

  insert_many()方法返回一个InsertManyResult对象，该对象具有属性inserted_ids，其中包含插入的文档的ID。
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  插入具有指定ID的多个文档

  如果您不希望MongoDB为文档分配唯一的ID，则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。

  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)