tornado mongodb查询字典

首先需通过python在mongodb 中创建字典：

from pymongo import MongoClient
from bson.objectid import ObjectId
from datetime import datetime
client = MongoClient()
print(client.database_names())
db = client['example']#新建数据库
db.example.insert({"word": "oarlock", "definition": "A device attached to a rowboat to hold the oars in place"})
print(client.database_names())
db.example.insert({"word": "perturb", "definition": "Bother, unsettle, modify"})
my_collection = db.example
cursor = my_collection.find()
print(cursor.count())   # 获取文档个数
for item in cursor:
    print(item)

运行结果如下图所示：

证明添加的文档数量为2 ：有2个id号。




import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web

from pymongo import MongoClient
from tornado.options import define, options
define("port", default=8000, help="run on the given port", type=int)

class Application(tornado.web.Application):
    def __init__(self):
        handlers = [(r"/(\w+)", WordHandler)]
        #conn = pymongo.Connection("localhost", 27017)
        #self.db = conn["example"]
        client = MongoClient()
        self.db=client['example']#有example数据库则连接，没有则创建
        tornado.web.Application.__init__(self, handlers, debug=True)

class WordHandler(tornado.web.RequestHandler):
    def get(self, word):
        print("11111111")
        coll = self.application.db.example
        word_doc = coll.find_one({"word": word})
        if word_doc:
            del word_doc["_id"]
            self.write(word_doc)
        else:
            self.set_status(404)
            self.write({"error": "word not found"})

if __name__ == "__main__":
    tornado.options.parse_command_line()
    http_server = tornado.httpserver.HTTPServer(Application())
    http_server.listen(options.port)
    tornado.ioloop.IOLoop.instance().start()

浏览器输入网址：http://localhost:8000/oarlock

浏览器输入网址：http://localhost:8000/perturb

主要是将字典保存在mongdb中，而后通过tornado在web上查询显示。

tornado mongodb查询字典

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