Retain form data on redirection

Guyz,

How to retain form data while redirecting back to same page? i do not
want to work with sessions option. Any other way ..? I mean i am
creating a record and after hitting submit button one of my validation
failed and the form redirects to the same page where i have to fill the
form values again. But this time every text field value are gone..

Googled but no light.. :slight_smile:

Hemant Bhargava wrote:

Guyz,

How to retain form data while redirecting back to same page? i do not
want to work with sessions option. Any other way ..? I mean i am
creating a record and after hitting submit button one of my validation
failed and the form redirects to the same page where i have to fill the
form values again. But this time every text field value are gone..

Controllers typically do not redirect upon validation failures. If you
simply render the page again your form data will be available and the
Rails framework will kindly repopulate the form fields for you
automatically.

If you want to know what that code looks like just run a scaffold
generator in new Rails project. Follow that pattern in your own
controllers and you'll save yourself a lot of headaches.

That being said... a redirect is going to lose the context of the
previous request. HTTP is a stateless protocol. This is the reason
cookies and sessions exist, and a primary reason why frameworks, such as
Rails, are needed.

Robert Walker wrote:

Hemant Bhargava wrote:

Guyz,

Controllers typically do not redirect upon validation failures. If you
simply render the page again your form data will be available and the
Rails framework will kindly repopulate the form fields for you
automatically.

If you want to know what that code looks like just run a scaffold
generator in new Rails project. Follow that pattern in your own
controllers and you'll save yourself a lot of headaches.

That being said... a redirect is going to lose the context of the
previous request. HTTP is a stateless protocol. This is the reason
cookies and sessions exist, and a primary reason why frameworks, such as
Rails, are needed.

Thanks dude.. Thanks for such a good information to me.. :slight_smile: I made it
worked as well.

I have a view that is a form in add.html.erb and in the create method
in the controller I have validation check if everything in the form is
set. If validation finds an error, I do

render :action => :add

and all the set values are lost.

if I just do "render" or nothing, it defaults to the create view.
Obviously redirect to add didn't work either.

More suggestions?

You may have to supply some code, as render :action => :add should
work. Do the variables have the same names? Are there any variables
set in the "add" action that aren't getting set in the "create"
action? Rendering an action does not run its controller code, only
renders its view template.

I set a cookie but otherwise don't really have any variables that
cross. I also have other forms that are even simpler (not even the
cookie) and they blank out as well. I also checked my views, no
variables are the same. Thanks for your help.

class Qcsubmissions::SetupDatabasesController < ApplicationController
  layout 'qcsubmissions'

  def create
    if params[:setup_database]['page'] == "index"
      #Set variables and set cookies
      sCode = params[:setup_database]['DatabaseCode']
      cookies[:code] = sCode
      #determine if code is queriable or not
      db = SetupDatabase.new(sCode, current_user.name)
      bExist = db.newDatabase()
      if bExist then
        redirect_to :action => :query
      else
        redirect_to :action => :add
      end
    #Add new, Product and Action Tables
    elsif params[:setup_database]['page'] == "add"
      #Set variables and set cookies
      sCode = params[:setup_database]['DatabaseCode']
      cookies[:code] = sCode
      #determine if code is queriable or not
      db = SetupDatabase.new(sCode, current_user.name)
      bExist = db.newDatabase()
      if bExist == false
        if validateProductTable(params[:setup_database],
params[:dbType], params[:interface])
              db.addProduct(params[:setup_database]['DatabaseName'],
params[:dbType], params[:interface])
              redirect_to :action => :query
              db.emailSD(current_user.id)
            else
              render :action => :add
            end
          else
            render :action => :add
          end
        else
          render :action => :add
        end
      else
        flash[:error] = "<div>Submission Not Accepted: Database
already exists.</div>"
        redirect_to :action => :query
      end
    end
  end

  def query
    #variables to pass to the view
    @code = cookies[:code]
    @db = "development"
  end

  def add
    #variables to pass to the view
    @code = cookies[:code]
  end

  def index
  end

  def show
    redirect_to :action => :index
  end

  #Validate Insert into Product Table
  def validateProductTable(formParams, formType, interface)
    bOK = true
    fmessage = Array.new
    if formParams['DatabaseName'].blank?
      bOK = false
      fmessage << "<div>Database Name is required.</div>"
    end
    if formParams['DatabaseCode'].blank?
      bOK = false
      fmessage << "<div>Database Name is required.</div>"
    end
    if formType.blank?
      bOK = false
      fmessage << "<div>Database Type must be selected.</div>"
    end
    if interface.blank?
      bOK = false
      fmessage << "<div>Interface must be selected.</div>"
    end
    if fmessage.length > 0
      flash[:error] = fmessage
    end
    return bOK
  end
end