我的代码如下。它仅加载第一个图像表单“帖子”数据库。我怎样才能从数据库中加载所有图像????
import webapp2
import os
import jinja2
from google.appengine.ext import db
from google.appengine.api import images
神社模板代码
template_dir = os.path.join(os.path.dirname(__file__), 'templates')
jinja_env = jinja2.Environment(loader = jinja2.FileSystemLoader(template_dir),
autoescape = True)
class Handler(webapp2.RequestHandler):
def write(self, *a, **kw):
self.response.out.write(*a, **kw)
def render_str(self, template, **params):
t = jinja_env.get_template(template)
return t.render(params)
def render(self, template, **kw):
self.write(self.render_str(template, **kw))
html图片上传
form="""
<form action="/" enctype="multipart/form-data" method="post">
<div><label>Avatar:</label></div>
<div><input type="file" name="img"/></div>
<input type="submit" value="switch">
</form>
"""
图像数据库
class Greeting(db.Model):
avatar = db.BlobProperty()
created = db.DateTimeProperty(auto_now_add = True)
这是为了形象。但它只加载第一个图像表单“帖子”数据库。如何从数据库中加载所有图像?
class Image(Handler):
def get(self):
posts = db.GqlQuery("select * from Greeting order by created desc")
for post in posts:
self.response.headers['Content-Type'] = 'image/jpg'
self.response.out.write(post.avatar)
MainHandler 并调整图像大小
class MainHandler(Handler):
def get(self):
self.response.out.write(form)
def post(self):
avatar = images.resize(self.request.get('img'), 400, 400)
greeting = Greeting()
greeting.avatar = db.Blob(avatar)
greeting.put()
app = webapp2.WSGIApplication([('/', MainHandler),
('/img', Image),],
debug=True)