Question

我正在构建一个学习项目（使用Python和Google App Engine）并且不知道如何做我想要的。我希望有人能指出我正确的方向。

该项目是一个基本的杂务Web应用程序，可以直播here。如您所见，Add Chore功能可以正常工作。仅供参考，您必须重新加载页面才能在添加杂项后查看更新的杂项列表。但是，如果你想查看杂项的详细信息页面，甚至完成一项杂务，你还不能在应用程序中这样做，因为我还没有弄清楚如何以一种有意义的方式引用数据库实体离开一个页面然后去另一个。

更新的项目代码为available on GitHub以供参考。基本上，我要做的是当用户点击其中一个“Do Chore”链接时，app会抓取对相应杂项名称的引用，然后就可以进行数据库查找。

例如，获取对“Dishes”的引用，然后应用程序可以查找名为“Dishes”的杂项数据对象。提前感谢您的时间和精力。

这是我的main.py文件......

import os
import re
from string import letters

import webapp2
import jinja2

from google.appengine.ext import db

template_dir = os.path.join(os.path.dirname(__file__), 'templates')
jinja_env = jinja2.Environment(loader = jinja2.FileSystemLoader(template_dir),
                               autoescape = True)

def render_str(template, **params):
    t = jinja_env.get_template(template)
    return t.render(params)

class BlogHandler(webapp2.RequestHandler):
    def write(self, *a, **kw):
        self.response.out.write(*a, **kw)

    def render_str(self, template, **params):
        return render_str(template, **params)

    def render(self, template, **kw):
        self.write(self.render_str(template, **kw))

class ChoreFront(BlogHandler):
    def get(self):
        chores = db.GqlQuery("select * from Chore order by created desc limit 10")
        self.render('front.html', chores = chores)

class AddChore(BlogHandler):
    def get(self):
        self.render('add-chore.html')

    def post(self):
        name = self.request.get('chore_name')
        description = self.request.get('chore_description')

        if name and description:
            # TODO - Implement error handling for duplicate chore 
            chore = Chore(parent = blog_key(), 
                          key_name = name,  
                          name = name, 
                          description = description, 
                          times_completed = 0, 
                          last_doer = "No one")
            chore.put()
            self.redirect('/')
        else:
            error = "Please provide a chore name and description!"
            self.render("add-chore.html", name = name, description = description, error=error)

class DoChore(BlogHandler):
    def get(self):
        self.render('do-chore.html')

    def post(self):
        doer_name = self.request.get('doer_name')

        if doer_name:
            # TODO - Update times_completed, last_doer, last_completed for the chore
            self.redirect('/')
        else:
            error = "Please enter your name!"
            self.render("do-chore.html", doer_name = doer_name, error=error)

class ChoreDetail(BlogHandler):
    def get(self):
        self.render('chore-detail.html')

    def post(self):
        doer_name = self.request.get('doer_name')

        if doer_name:
            # TODO - Update times_completed, last_doer, 
            # last_completed(done automatically) for the chore
            self.redirect('/')
        else:
            error = "Please enter your name!"
            self.render("do-chore.html", doer_name = doer_name, error=error)


def blog_key(name = 'default'):
    return db.Key.from_path('blogs', name)

class Chore(db.Model):
    name = db.StringProperty(required = True)
    description = db.TextProperty(required = True)
    times_completed = db.IntegerProperty()
    last_doer = db.StringProperty()
    created = db.DateTimeProperty(auto_now_add = True)
    last_completed = db.DateTimeProperty(auto_now = True)

    def render(self):
        self._render_text = self.description.replace('\n', '<br>')
        return render_str("chore.html", chore = self)


app = webapp2.WSGIApplication([('/', ChoreFront), 
                               ('/addchore', AddChore),
                               ('/dochore', DoChore), 
                               ('/choredetail', ChoreDetail)
                                ], 
                                debug=True)

如何在请求中传递DOM内容以进行数据库查找

0 个答案: