如何将值传递给龙卷风中的模板

Question

我有一个模板显示从服务器传递的很多值,我的问题是如何将这些值传递给模板文件.我的Handler代码如下:class AdminHandler(tornado.web.RequestHandler):def get(self,*args,**kwargs):#respond to get方法#self.write("AdminHandler :: Inside GET function")

    userName = "Alwin Doss"
    welcomeMessage = "Good evening are you enjoying kids dance"
    items = {}
    items["userName"] = userName
    items["welcomeMessage"] = welcomeMessage


    self.render("web/admin.html", title="Admin Page", items=items)

我的模板代码如下:{%items ['userName']%} {%items ['welcomeMessage']%} {%end%}

问题是我无法在模板文件中访问这些值.我收到以下错误:

raise ParseError("unknown operator:%r"%operator)ParseError:unknown operator:"items ['userName']"ERROR:root:500 GET/admin(127.0.0.1)3.27ms

Answer 1

这是一个类似于你似乎正在做的演示.查看模板的语法,并查看块{% %}和{{ }}块的不同用法.这段代码:

from tornado import template

t = template.Template('''\
{% for user in users %} 
    {{ user['userName'] }} 
    {{ user['welcomeMessage'] }} 
{% end %}
''')

# create first user and append to a user list
users = []
user = { "userName" : "Alwin Doss",
        "welcomeMessage" : "Good evening are you enjoying kids dance"}
users.append(user)

# create and append second user
user = { "userName" : "John Smith",
        "welcomeMessage" : "Good evening, JS"}
users.append(user)

# render the template and output to console
print t.generate(users = users)

生成此输出:

Alwin Doss 
Good evening are you enjoying kids dance 

John Smith 
Good evening, JS 

有关Tornado模板的更多信息,请查看本教程,当然还有Tornado模板文档.