How to use strong parameters with an objects array in Rails

Question

When using Rails 4.0 strong parameters, how do I permit JSON like this?

{
   "user":
   {
       "first_name":"Jello"
   },
   "users_to_employer":[
       {
           "start_date":"2013-09-03T16:45:27+02:00",
           "end_date":"2013-09-10T16:45:27+02:00",
           "employer":{"company_name":"Telenor"}
       },
       {
           "start_date":"2013-09-17T16:45:27+02:00",
           "end_date":null,
           "employer":{"company_name":"Erixon"}
       }
   ]
}

I tried:

 params.require(:users_to_employers => []).permit(
                                                 :start_date, 
                                                 :end_date => nil,
                                                 :employer => [
                                                     :company_name
                                                 ])

But it didn't work.

try params.permit(users_to_employers: [{ :start_date, :end_date, employer: { :company_name }]) — Mike Szyndel
– Mike Szyndel, Commented Sep 3, 2013 at 16:44
When asking, don't say things like "it didn't work." That tells us nothing. If you got an error, put that into the question. If you expected a different result than what you got, put the expectation and the actual result into the question. See "How to Ask" and the linked pages for more information. — the Tin Man
– the Tin Man, Commented Mar 23, 2020 at 21:27

the Tin Man · Accepted Answer · 2020-03-23 21:28:03Z

35

To accept an array of objects, put the params in an array:

params.permit(
  users_to_employers: [
    :start_date,
    :end_date,
    employer: [ :company_name ]
  ]
)

edited Mar 23, 2020 at 21:28

the Tin Man

161k44 gold badges222 silver badges308 bronze badges

answered Sep 3, 2013 at 17:40

Mike Szyndel

10.6k11 gold badges51 silver badges64 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Johan S Over a year ago

My ruby works fine with []but not with {}. It says it's a syntax error with {}, but I'm using the `{ :employer => [ :company_name] syntax.

Mike Szyndel Over a year ago

I updated the answer. I didn't really test that, just knew how it should work.

Collectives™ on Stack Overflow

How to use strong parameters with an objects array in Rails

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related