Assign a value to a param, from 2 choices.

Controller

  def new
    @micropost = Micropost.new(:tag => '4' )

# Change the value of 'Micropost.find(..).to_guys' to True or False depending on what button was pressed
    if request.post?
      if params[:name].include?( 'to_guys' )
        @micropost.to_guys = true
        flash[:notice] = 'This post was sent to guys'
      else
        @micropost.to_guys = false
         flash[:notice] = 'This post was sent to girls'
      end
    end

  end

migration

class CreateMicroposts < ActiveRecord::Migration
  def change
    create_table :microposts do |t|
      t.boolean :to_guys
      t.string :tag
      t.boolean :approved
      t.string :content

      t.timestamps
    end
  end
end

View

<%= form_for @micropost do |f| %>
  <p>
    <fieldset>
      <legend> Enter something </legend>
    <%= f.text_field :content, :size => 90 %> <br/>


    <%= f.label "Send to who?:" %>
    <%= submit_tag "to Guys", :name => "to_guys" %>
    <%= submit_tag "to Girls", :name => "to girls" %>
    </p>
    </fieldset>
<% end %>