Re: using import CSV with params

Bill Walton
Wed, 03 Dec 2008 15:59:14 -0000

Hi denver,

denver wrote:

> I am using import CSV to import from a csv file to my database
> in my rails app. I want to be able to be able to add a list of email
> addresses from this file but also include the mailinglist_id which is
> a param[:id] on my page in the database entry. So in effect adding
> a csv of emails to any mailing list.
>
> I am just a little unclear as to how I add the extra field when adding
> the data to the database.... any help would be great!!

The easiest way might be to add a hidden field to your form to pass the
controller the mailinglist_id.  I''ve added a little code below
(untested)
that might do the trick.

HTH,
Bill

> Database table "mailings" is as follows...
>
> mailinglist_id, id, name, email_address
>
> --------------------------------------------------------------------------
---------------------------------------------------
> import_csv controller
>
>   def csv_import
*       mailing_list_id = params[:mailing_list_id]
>       file = params[:csv_import][:file]
>       logcount=0
>       Mailing.transaction do
>         FasterCSV.parse(file, :headers => true) do |row|
>           Mailing.create!(row.to_hash)
*           Mailing.mailing_list_id = mailing_list_id
*           Mailing.save
>           logcount += 1
>         end
>       end
>       flash[:notice] = "Successfully imported #{logcount} email(s)
> from mailing list."
>       redirect_to :action => :index
>     rescue => exception
>       # If an exception is thrown, the transaction rolls back and we
> end up in this rescue block
>       error = ERB::Util.h(exception.to_s) # get the error and HTML
> escape it
>       flash[:error] = "Error adding list.  (#{error}).  Please try
> again."
>       redirect_to :action => :index
>     end
> --------------------------------------------------------------------------
---------------------------------------------------
>
> index.html.erb
>
> <% form_for :csv_import, :url=>{
:controller=>"import_csv", :action =>
> ''csv_import''},
> :html => { :multipart => true } do |f| %>
>
> <%= f.label :file, ''Import mail list file''
%>
> <%= f.file_field :file -%>
* <%= hidden_field_tag(''mailing_list_id'', ''a local
or an instance variable'')
%>
>
>
> <%= submit_tag "Submit" %>
>
> <% end %>
>
> --------------------------------------------------------------------------
-----------------------------------------------------
>
>
> >