Ruby on Rails: How to pass variable between controller functions?

Question

I need to use params[:number] from the new function in the create function, how would I go about doing this?

def new
   @test_suite_run = TestSuiteRun.new

    @tests = Test.find(:all, :conditions => { :test_suite_id => params[:number] })
end

def create        
    @test_suite_run = TestSuiteRun.new(params[:test_suite_run])

    @tests = Test.find(:all, :conditions => { :test_suite_id => //I need the same params[:number] here})   
end

EDIT: I guess I am confused as the differences between new and create then. I am taking in the parameter :number by passing it to new.

new_test_suite_run_path(:number => ts.id)

I am then using it to generate the form. I don't understand what to do in the create function then. If I remove the create function in the controller, when I submit the form in new, it gives me an error saying that there is no create action in the controller. Does that mean I have to move everything in new to the create function? How would that be possible, would I have to create a create.html.erb and move all my form information?

Seems counter-intuitive to have both a new and create function :/ seems like you would need to pass in the original :number parameter into both functions from the same place — reagan
– reagan, Commented Jul 10, 2012 at 1:16
Your use of new and create methods are unconventional. Can you tell us what you would like to accomplish? Maybe we can suggest a way of doing what you want, without doing the unconventional way. — Jason Kim
– Jason Kim, Commented Jul 10, 2012 at 1:16

Only Bolivian Here · Accepted Answer · 2012-07-10 01:15:34Z

5

You can use Flash: http://api.rubyonrails.org/classes/ActionDispatch/Flash.html

The flash provides a way to pass temporary objects between actions. Anything you place in the flash will be exposed to the very next action and then cleared out.

def new
   @test_suite_run = TestSuiteRun.new
   @tests = Test.find(:all, :conditions => { :test_suite_id => params[:number] })

   flash[:someval] = params[:number]
end

def create        
    @test_suite_run = TestSuiteRun.new(params[:test_suite_run])

    @tests = Test.find(:all, :conditions => { :test_suite_id => flash[:someval] })   
end

answered Jul 10, 2012 at 1:15

Only Bolivian Here

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Comments

Jason Kim · Accepted Answer · 2012-07-10 01:51:11Z

2

I guess I am confused as the differences between new and create then.

Let's address this issue first.

new method generates a view for a form where Rails build a TestSuiteRun instance. This instance exists only memory temporally.

create method takes the data entered in the form, and actually saves the instance created into database permanently.

I don't think you need to change your new method.

Try changing your create method to this.

def create
  @test_suite_run = TestSuiteRun.new(params[:test_suite_run])
  @test_suite_run.save
end

answered Jul 10, 2012 at 1:51

Jason Kim

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