MongoEngine

安装

pip install mongoengine

连接数据库

#方式一:
connect('local')
#方式二:指定端口和地址
connect('local',host='192.168.21',port=125)
#方式三：
connect('local',host='mongodb://localhost/local')

ODM常见模型：

StringField / ObjectIdField / IntField / FloatField / DecimalField / BooleanField / DateTimeField / ListField

实用操作

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Auther:Awe H

from mongoengine import connect, Document, EmbeddedDocument,  StringField, IntField, FloatField, ListField,EmbeddedDocumentField

SEX_CHOICES = (
    ('male','男'),
    ('female','女')
)

connect('students')

#成绩
class Grade(EmbeddeDocument):
    name = StringField(required=True)
    score = FloatField(required=True)

#学生
class Student(Document):
    name = StringField(max_length=32, required=True)
    age = IntField(required=True)
    grade = FloatField()
    address = StringField()
    sex = StringField(choices=SEX_CHOICES,required=True)
    grades = ListField(EmbeddedDocumentField(Grade))

    #设置集合名称，以及排序方式
    meta = {
        'collection': 'students',
        'ordering': ['-age']
    }

class TestMongoEngine(object):
    #增加一条数据
    def add_one(self):
        yuwen = Grade(
        name='语文',
        score=90
        )
        shuxue = Grade(
        name='数学',
        score=100
        )
        stu_obj = Student(
            name='张三',
            age=16,
            sex='male',
            grades=[yuwen,shuxue]
        )
        stu_obj.save()
        return stu_obj

    #查询一条数据
    def get_one(self):
        return Student.objects.first()

    #查询多条数据
    def get_more(self):
        return Student.objects.all()

    #根据ID获取数据
    def get_from_oid(self, oid):
        return Student.objects.filter(pk=oid)

    #修改数据
    def update(self):
        # return Student.objects.filter(sex='male', age__ge=16).update(inc__age=10)
        #修改一条数据
        return Student.objects.filter(sex='male').update_one(inc__age=100)

    #删除数据
    def delete(self):
        #删除一条数据
        # return Student.objects.filter(sex='male').first().delete()
        #删除多条数据
        return Student.objects.filter(sex='female').delete()