Change params inside controller rails

Question

How can I change params inside controller?

When I click the accept it will pass the status is approved but if diff <= 0 change status to rejected

View

<%= link_to 'Accept', friend_path(s, :request => {:status => 'Accepted'}), method: :put  %>

into this

    if diff <= 0
     req_params[:status] = "Rejected" 
     @request.update(req_params)
    end
end 

private 
 def req_params
    params.require(:request).permit(:status)
 end

end

Is req_params is params filtered by strong params? (require,permit) — AntonTkachov
– AntonTkachov, Commented Nov 9, 2017 at 12:55
Can you paste the whole controller method? rails doesn't have req_params method — AntonTkachov
– AntonTkachov, Commented Nov 9, 2017 at 13:02
You want to use button_to or a regular form and not link_to and pass the parameters in the request body instead of the URL. Using link_to with method: option should only be really be done when the request has no params like link_to "Delete", thing, method: :delete — max
– max, Commented Nov 9, 2017 at 13:09
Still... It's not clear what is diff variable? Can you please post all your controller action code? (I think it's update method) — AntonTkachov
– AntonTkachov, Commented Nov 9, 2017 at 13:11
Where do you take start and end variables? (I'am asking all of this, because I want to suggest you some really good solution in case of design) — AntonTkachov
– AntonTkachov, Commented Nov 9, 2017 at 13:21

Diego Patricio Aguilef Sánchez · Accepted Answer · 2017-11-09 14:31:08Z

11

To modify your status param, you need to do the following:

params[:request][:status] = 'Rejected' 

or

req_params[:request][:status] = 'Rejected'

Because your request take params like this:

Parameters => { some_param => 'Something', required => { permited1 => 'bla', 
                                                     permited2 => 'bla2',
                                                    ... } }

I hope that helps you

answered Nov 9, 2017 at 14:31

Diego Patricio Aguilef Sánchez

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El3ktra · Accepted Answer · 2025-07-13 01:09:37Z

0

I know this is an old thread, but it took me a few hours to figure this out (I'm a ROR novice) and I figured I'd put my solution in for anyone that came here with my problem.

Don't try to overwrite the fields directly, instead just chain merge:

@request.update(req_params).merge!(:status, "Rejected")

Here is my working snippet. My form gives me a date and time in two different fields, so I need to merge them into a datetime to store in my model. I do that on the fly when calling update and save.

animal_vital.update!(animal_vital_params.merge!( dt: params[:animal_vital][:dt] + " " + params[:animal_vital][:tm]).except(:tm))

You need merge!, not merge. Hope this helps!

answered Jul 13 at 1:09

El3ktra

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