我正面临一个问题,我正在使用Flask缓存模块,如果我遇到运行时错误,我不希望缓存视图。
有人可以建议怎么做吗?
这是我想要实现的目标。
from flask import Flask
from flask.ext.cache import Cache
app = Flask(__name__)
mycache = Cache()
mycache.init_app(app)
@mycache.cached()
@app.route('/myview')
def process_view():
try:
return get_something()
except:
return print_error_and_no_cache_this_view()
如果我遇到错误,有关如何停止缓存此视图的任何想法?
答案 0 :(得分:1)
您可以在cache.delete_memoized
处理程序中调用after_this_request
:
# @cached needs to be invoked before @route
# because @route registers the handler with Flask
# and @cached returns a different function.
# If you @route first and then @cache Flask will
# always execute the *uncached* version.
@app.route('/myview')
@mycache.cached()
def process_view():
try:
return get_something()
except:
@app.after_this_request
def clear_cache(response):
mycache.delete_memoized('process_view')
return response
return print_error_and_no_cache_this_view()
或者,查看Flask-Cache的代码,它显示为does not handle errors thrown by the view。所以你可以自己简单地引发错误并使用单独的处理程序处理异常:
@app.route('/myview')
@mycache.cached()
def process_view():
try:
return get_something()
except Exception as e:
raise ProcessViewIssue(e)
@app.errorhandler(ProcessViewIssue)
def handle_process_view_error(e):
return print_error()