Rails 有个 json 字段在数据库中供用户编辑，rails 如何传 json 格式到 controller
.setting-wrapper
= form_for flow, as: :flow, url: [:admin, flow], remote: true do |f|
= f.text_area :extra_rules, placeholder: '请输入 extra rules'
.setting-actions.justify-between
.left
= f.submit '保存'
Parameters: {"utf8"=>"✓", "flow"=>{"extra_rules"=>"{one:1,two:2}"}, "commit"=>"保存", "id"=>"97"}
我现在从前端拿到的是字符串，没办法解析成 json
先加上双引号再处理：
begin
str = "{one:1,two:2}"
str.gsub!(/[\w|\p{Han}]+(?=:)/, '"\0"') # => "{\"one\":1,\"two\":2}"
JSON.parse str
rescue JSON::ParserError
# handle error
end