json - is there a good way to serialize only select columns of a list of BossRecords?

[Neil Pahl]

I like the feature of serializing the BossRecord automatically when returning a json via the web controller:

{json, Data::proplist()}

Return Data as a JSON object to the client. Performs appropriate serialization if the values in Data contain a BossRecord or a list of BossRecords.

However, I usually have fields containing information I don't want to share with the client. I think it would be pretty convenient if there was a feature that would serialize only the fields which you ask for? something like:

{json, Data::proplist(), [Key::atom()]}

In the meantime, anyone have a good method of getting a list of proplists(of only chosen fields) from a list of BossRecords? or of serializing select fields of your BossRecords?

[chan sisowath]

hi,

i do like this

-module(toto, [Id, Name, Private, NotPrivate]).

-export([public/0]).

public() ->

    Attrs = [id, name, not_private],

    [{X,THIS:X()}|| X <- Attrs].

in your controller:
============

   instead of Record:attributes()

   you call Record:public()

if you have a list of record,

[X:public() || X <- ListRecord].

   

regards.

chan

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[can2nac]

nice!

[Neil Pahl]

That sure is an elegent solution - just what I was looking for. Thanks for sharing!

[Neil Pahl]

regarding mihawk's suggestion:

it seems that for the controller code, this gives error:

{json, [X:public() || X <- ListRecord]}

but something like this will serialize properly:

{json, [{X:id(),X:public()}||X<-ListRecord] }

Cheers,

On Tuesday, June 17, 2014 6:00:05 PM UTC+8, mihawk wrote:

[Phang Mulianto]

Hi ,

I encounter this for my json api, and got problem with Date time data.  The data is {{2016,11,15},{13,50,56}}

and when returned to json, its error. can some body help?

Why the {json, [{X:id(),X:public()}||X<-ListRecord] }  give error when there is datetime data inside the list records field.

Thanks

Mulianto