我正在尝试验证所有发送到我的api的数据。我的url结构中包含一个变量/api/v2/users/<string:username>/collections/
,以及实际的查询字符串参数,所有这些参数都需要通过验证。
完整网址如下:
https://127.0.0.1:5000/api/v2/users/<string:username>/collections/?page=5&per_page=10
需要验证的两个变量是:username
page
和per_page
。简单的解决方案是更改url结构,但是我想知道是否有可能实现我所需要的并保持当前的简单性,而无需在资源类中添加其他验证。如果有可能,您该怎么办?
class UserCollections(Resource):
@use_args({
'username': fields.Str(
required=True,
validate=username_length,
error_messages=dict(
required='Username is required.',
validator_failed='Username can be between 3 and 25 characters.',
)
),
'page': fields.Int(
#required=True,
missing=1,
validate=feed_minmax_pages,
error_messages=dict(
validator_failed='Maximum number of pages reached.',
)
),
'per_page': fields.Int(
#required=True,
missing=5,
validate=validate.Range(min=5,max=25),
error_messages=dict(
validator_failed='Test number of pages reached.',
)
),
}, locations=('query',))
def get(self, args, username):
print(args)
print(username)
return default_schema(
data={},
http_status=200
)
运行代码时,我得到username
的验证错误,因为它在args中不存在。
答案 0 :(得分:2)
闲逛了一会儿,我遇到了解决方案,现在在webargs flaskparser documentation中看到了
除了参数中的其他use_args location
参数之外,还可以轻松使用此参数。看来请求方法函数get
,post
等仍然需要您传入该url变量。在我的情况下是<username>
。
class UserCollections(Resource):
@use_args({
'username': fields.Str(
location='view_args',
required=True,
validate=username_length,
error_messages=dict(
required='Username is required.',
validator_failed='Username can be between 3 and 25 characters.',
)
),
'page': fields.Int(
location='query',
missing=1,
validate=feed_minmax_pages,
error_messages=dict(
validator_failed='Maximum number of pages reached.',
)
),
'per_page': fields.Int(
location='query',
missing=5,
validate=validate.Range(min=5,max=25),
error_messages=dict(
validator_failed='Test number of pages reached.',
)
),
})
def get(self, args, username):
print(args) # access with args['username']
print(username) # would be nice to not have a second of the same var
return default_schema(
data={},
http_status=200
)