Skip to content


Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
JSON to erlang record
branch: master

Fetching latest commit…

Cannot retrieve the latest commit at this time

Failed to load latest commit information.
.gitignore add gitignore file
rebar.config Change deps from git to https protocol

Making erlang record <~> json conversion easy.

Detailed info at exprecs, making json usable

Quick example:



-record(book, {
      style      :: atom(),
      count      :: integer(),
      available  :: boolean(),
      pages      :: integer(),
      excerpt    :: string(),
      author     :: string()

%% the exprecs export of the record interface
-compile({parse_transform, exprecs}).

%% here we provide a mapping of the json key to a record.
new(<<"book">>) ->

%% if the key is unknown, return undefined.
new(_RecName) ->

At this point we can take the following json and transform it into the #book{} record.

  "style": "fiction",
  "count": 1,
  "available": true,
  "pages": 42, 
  "excerpt": "Good bye and thanks for all the fish.",
  "author":"Adams, Douglas"

We can get a #book{} record from the above with

-spec json_to_rec(Json :: string()) -> #book{}.
json_to_rec(Json) ->
    ErlJson = mochijson2:decode(Json),
    Record = book:new(<<"book">>),
    json_rec:to_rec(ErlJson, book, Record).
Something went wrong with that request. Please try again.