json_worldでarrayの要素の型表現するやつ.rb

$ gem i json_world
Fetching: json_world-0.2.2.gem (100%)
Successfully installed json_world-0.2.2
1 gem installed
$ pry -r json_world
[1] pry(main)> class A
[1] pry(main)*   include JsonWorld::DSL
[1] pry(main)*   property(:x, type: Array, items: { type: String })
[1] pry(main)* end
=> [#<JsonWorld::PropertyDefinition:0x007f9fffa9bb08
  @options={:type=>Array, :items=>{:type=>String}, :parent=>A},
  @property_name=:x>]
[2] pry(main)> puts A.to_json_schema
{
  "properties": {
    "x": {
      "items": {
        "type": "string"
      },
      "type": "array"
    }
  },
  "required": [
    "x"
  ]
}
=> nil