Python MongoDB 插入文档



  • 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)
    
    
  • 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
  • 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。
  • 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)