问题
I am working on an api that should allow multiple params but for three of them I would like to allow only one of them. It easier with values for each key but I am wondering if Joi allows it too or I should add extra validation logic in my server.
In short, for keys a
, b
or c
I want to fail any request that has more than one of the three, so:
http://myapi.com/?a=value
is a valid request.http://myapi.com/?b=value&c=value2
is invalid.
Thanks!
回答1:
You're looking for object.xor(peers) if exactly one of a
, b
, or c
is required.
Defines an exclusive relationship between a set of keys where one of them is required but not at the same time where:
peers
- the exclusive key names that must not appear together but where one of them is required.peers
can be a single string value, an array of string values, or each peer provided as an argument.
const schema = Joi.object().keys({
a: Joi.any(),
b: Joi.any(),
c: Joi.any()
}).xor('a', 'b', 'c');
Or, object.oxor(peers) if only one of a
, b
, or c
is allowed, but none are required.
Defines an exclusive relationship between a set of keys where only one is allowed but none are required where:
peers
- the exclusive key names that must not appear together but where none are required.
const schema = Joi.object().keys({
a: Joi.any(),
b: Joi.any(),
c: Joi.any()
}).oxor('a', 'b', 'c');
回答2:
I guess I will do it with a Joi.try.
const one_of_them = {
query: Joi.alternatives().try(
{
a: Joi.string().required(),
b: Joi.string().invalid().required(),
c: Joi.string().invalid().required(),
},
{
b: Joi.string().required(),
a: Joi.string().invalid().required(),
c: Joi.string().invalid().required(),
},
{
c: Joi.string().required(),
a: Joi.string().invalid().required(),
b: Joi.string().invalid().required(),
},
),
};
But, maybe another solution can be better.
来源:https://stackoverflow.com/questions/54695534/joi-validator-only-one-of-keys