我在这里关注tumbleblog应用程序
我的__init__.py:
from flask import Flask
from flask.ext.mongoengine import MongoEngine
app = Flask(__name__)
app.config["MONGODB_SETTINGS"] = {'DB': "sencha_web_service", 'username': "<username>", "password": "<password>"}
app.config["SECRET_KEY"] = "KeepThisS3cr3t"
db = MongoEngine(app)
if __name__ == '__main__':
app.run()
我收到错误:
mongoengine.connection.ConnectionError: Cannot connect to database default :
False is not a read preference.
我想传递"alias"="default"的 app.config["MONGODB_SETTINGS"],但仍然得到同样的错误.
我是rails的初学者,我有这么多次:
["08:30","09:00","09:30","10:00","10:30","11:00","11:30","12:00"," 12:30","13:00","13:30","14:00","14:30","15:00","15:30","16:00","16: 30","17:00","17:30","18:00","18:30","19:00","19:30","20:00","20:30" ,"21:00","21:30"]
如何使用它将其转换为下拉列表options_from_collection_for_select.我试过用
<%= select_tag "start_time", options_from_collection_for_select(@start_time,:id, :name ) %>
但它回来了"undefined method 'name' for "08:30":String".
我是ruby的新手,我需要帮助将一串格式"dd.mm.yyyy"转换为日期时间.提前致谢!