How to allow empty array for params?

[qsona]

I wrote the following code.

params do
  requires :items, type: Array[JSON] do
    requires :id, type: Integer
    requires :enabled, type: Boolean
  end
end
post '/' do
# ...

A request with following params succeeds
{ items: [{ id: 1, enabled: true }, { id: 2, enabled: false }] }

But fails with following.
{ items: [] }

I changed the code to

params do
  optional :items, type: Array[JSON] do

But, all requests failed then.

I want to allow { items: [] } params. Is there any way to do it?

Thanks.

[dblock]

If you're POSTing JSON, I believe this just works. Care to share the code that does the POSTing?

I'll close this. Please use the Grape mailing list for questions.

[liquid1982]

I have the same problem, and can't figure out what a possible solution could be. It just seems a buggy behaviour. I need to allow the user to publish an article, and optionally specify a section. I also need to accept an empty array, that will result in unpublishing the article from the specified domain.

The non-working code is the following:

desc 'Publish an article'
params do
  optional :published_in, type: Hash do
    optional :'foo.com', type: Array[String], values: ALLOWED_SECTIONS['foo'], allow_blank: true
    optional :'bar.com', type: Array[String], values: ALLOWED_SECTIONS['bar'], allow_blank: true
  end
end
post 'articles/123/actions/publish' do
  # ...
end

But if I omit the values param, things work as expected:

desc 'Publish an article'
params do
  optional :published_in, type: Hash do
    optional :'foo.com', type: Array[String], allow_blank: true
    optional :'bar.com', type: Array[String], allow_blank: true
  end
end
post 'articles/123/actions/publish' do
  # ...
end

I'd like to specify the allowed values in the params block. Any suggestion?

[dblock]

What is the posting code? What is the error? What content-type is it POSting @liquid1982 ?

[liquid1982]

@dblock It is something like:

$.ajax({
  url: url,
  method: 'POST',
  contentType: 'application/json',
  data: JSON.stringify(payload)
}).then(() => {})

and the error message is published_in[foo.com] has a value not allowed.

[dblock]

You should turn it into a spec @liquid1982 in this project.