Processing Multiple Comma Separated Values in Rails Field

Question

I have a field in an app that currently allows admins of Groups to invite other Users (to the group). It works for a single value, but I'm wondering how to adjust it so that it allows the admin to enter multiple Users separated by commas into the field.

# form in view
<%= form_tag({:controller => "group_members", :action => "invite_user"}, :method => "post") do %>
  <%= hidden_field_tag 'group_id', @group.id%>
  <%= text_field_tag :user_name %>
  <%= submit_tag "Invite" %>
<% end %>

# group_members_controller
def invite_user
  @user = User.find_by_user_name(params[:user_name])
  @group_member = GroupMember.create!(:status=>"invited", :user_id=>@user.id, :group_id => params[:group_id], :token => SecureRandom.urlsafe_base64)
  redirect_to :back, notice: "#{@user.user_name} has been invited to your group"
end

writing the user_name, sorry, the text_field_tag should be named :user_name instead of :user_id — yellowreign
– yellowreign, Commented May 7, 2013 at 22:24
Consider using autocomplete, because is hard to write all names correctly. — cortex
– cortex, Commented May 7, 2013 at 22:33

cortex · Accepted Answer · 2013-05-07 22:29:11Z

1

Try this:

<%= form_tag({:controller => "group_members", :action => "invite_users"}, :method => "post") do %>
  <%= hidden_field_tag 'group_id', @group.id%>
  <%= text_field_tag :users %>
  <%= submit_tag "Invite" %>
<% end %>

# group_members_controller
def invite_users
  user_names = params[:users].split(/,\s*/)
  users = User.where(name: user_names)
  group_id = params[:group_id]

  @users.each do |user|
    GroupMember.create!(:status=>"invited", :user_id=>user.id, :group_id => group_id, :token => SecureRandom.urlsafe_base64)
  end

  redirect_to :back, notice: "Users have been invited to your group"
end

answered May 7, 2013 at 22:29

cortex

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Comments

Gray Kemmey · Accepted Answer · 2013-05-07 22:37:43Z

0

You could let params[:user_name] be a comma seperated list of users and parse it in invite_user:

@users = params[:user_name].split(/,\s*/).

This would split params[:user_name] into an array, splitting on a comma followed by zero or more whitespace characters. Turning "Joe, John, Marry,Ann" into ["Joe", "John", "Marry", "Ann"].

You could then do the following still in invite user:

@users.each do |username|
    @user = User.find_by_user_name(params[username])
    @group_member = GroupMember.create!(:status=>"invited", :user_id=>@user.id, 
                                        :group_id => params[:group_id], 
                                        :token => SecureRandom.urlsafe_base64)

end

redirect_to :back, notice: "my_message"

edited May 7, 2013 at 22:37

answered May 7, 2013 at 22:23

Gray Kemmey

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