如何使用patch_internal

Question

在我的应用程序中，我有一个应该更新资源中的字段的钩子:在另一个帖子中，有人使用了patch_internal方法，但我不明白如何使用。

from my_application import app
from eve.methods.patch import patch_internal

def my_hook(...):
    with app.test_request_context():
        patch_internal("my_resource", payload={"bar": "bar_value"}, lookup={"foo": "foo_value"})

我试着在settings.py中使用settings.py。

取决于我尝试的方式，我得到了

• 原始请求的404，它首先触发了钩子，
• 或者AssertionError：

。

Debugging middleware caught exception in streamed response at a point where response headers were already sent.
Traceback (most recent call last):
  File ".../lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File ".../lib/python2.7/site-packages/flask/app.py", line 1825, in wsgi_app
    ctx.auto_pop(error)
  File ".../lib/python2.7/site-packages/flask/ctx.py", line 374, in auto_pop
    self.pop(exc)
  File ".../lib/python2.7/site-packages/flask/ctx.py", line 357, in pop
% (rv, self)
AssertionError: Popped wrong request context.
(<RequestContext 'http://127.0.0.1:5001/' [GET] of eve> instead of <RequestContext 'http://127.0.0.1:5001/my_endpoint' [GET] of eve>)

我的问题是：

patch_internal的合适参数是什么？我该怎么告诉伊芙，我想换哪一件？

Answer 1

这是一个微不足道的例子，应该有效：

from eve import Eve
from eve.methods.patch import patch_internal


app = Eve()

def my_hook(*args):
    with app.test_request_context():
        payload = {"bar": "bar_value"}
        lookup = {"_id": "4f71e038c88e201118000002"}
        patch_internal("my_resource", payload, **lookup)


# this is rather stupid. We're going to patch the same document on *every* GET request, but you get the point
app.on_post_GET += my_hook


if __name__ == '__main__':
    app.run()

或者，您可以查看贴片内试，以获得一个更清晰的示例。这里还有一个很好的内部实例。希望这能有所帮助。