ORM JSON请求处理数据集插入

Question

我正在尝试查看通过邮政请求发送的JSON请求，以将安全组信息添加到表中，而我的请求看起来像下面的一个

POST /securitygroup HTTP/1.1
Host: localhost:9292
Content-Type: application/json
Cache-Control: no-cache
Postman-Token: c4bef1db-d544-c923-3b0b-e7004e2dd093
{
  "securitygroup":{
    "secgrp_id": 124,
    "secgrp_nm": "SECURITY ADMIN",
    "secgrp_profile_nme": "ADMIN"
  }
}

Roda代码如下

# cat config.ru
require "roda"
require "sequel"
require "oci8"
require "json"
DB = Sequel.oracle(host: 'xyz.dev.com', port: '1525', database: 'devbox1', user: 'abc', password: 'pass')
class App < Roda
  plugin :json, classes: [Array, Hash, Sequel::Model, Sequel::Dataset]
  route do |r|
    # secgroup = DB[:security_groups]
    # secgroup.insert(r.params["securitygroup"])
    # secgroup 
    # above insert threw the following error
    # OCIError: ORA-00947: not enough values,
    # because SQL generated as below
    # INSERT INTO "SECURITYGROUPS" VALUES (NULL)
    # so I am trying to access the request object 'r', I feel that I am doing 
    # something which is not correct 
    {"response": r.params.["securitygroup"]["secgrp_id"]}
    # throws undefined method `[]' for nil:NilClass
  end 
end

您可以查看请求并指向我，我要在哪里出错，请求格式不正确或有其他方法可以处理Ruby Code上的请求。

我需要帮助来解析与https://twin.github.io/introduction-to-to-roda/

中提出的代码相似的JSON的请求。

  r.post "albums" do
    album = Album.create(r.params["album"])
    r.redirect album_path(album) # /albums/1
  end

Answer 1

您只需要一点调整：添加到应用程序插件:json_parser。

class App < Roda
  # use this plugin to convert response to json
  plugin :json
  # use this plugin to convert request from json
  plugin :json_parser
  ...
end

请参阅RODA文档中的"与Roda一起运送的插件"，"其他"中有json_parser插件。