I need to send request to my Rails API with key like: ids: [null, 1, 2, null, 3]. Unfortunately Rails cuts all the nulls from this array so the params[:ids] returns [1, 2, 3]. I need those nulls in the array.
How can I prevent Rails from removing them? I can send empty string instead of null, but it's not very elegant.
In rails 5, intends to not have the same sql injection vulnerabilities and so have removed the deep_munge method that would change an empty array value to nil but have left in the configuration option which produces behavior best described by looking at the tests.
for more info
https://apidock.com/rails/v3.2.8/ActionDispatch/Request/deep_munge
https://til.hashrocket.com/posts/e1bed09363-deepmunge-i-hardly-knew-ye
In application.rb add below line
config.action_dispatch.perform_deep_munge = false
and restart the application
use json structure instead of array
replace
ids: [null, 1, 2, null, 3]
with
ids: {"0": null, "1": 1, "2": 2, "3": null, "4": 3}
And in controller access it like
params[:ids].values
[nil, 1, 2, nil, 3]
In different environment null value is interpreted differently.
I think that the best practice is to replace these entries according the result you want to achieve:
ids.map! { |id| id == null ? nullValue : id }.flatten!
Where nullValue is what you're expecting to have in the array.