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class LoginController < ApplicationController    def addprod       @category=Cattab1.find(:all)       @product=Prodtab.find(:all)       @i=0       @checkvalue=""    end

   def login        @logincheck =Login.new        @prodcheck=Prodtab.new         if(session[:login_id])             Login.update(session[:login_id],:user_status=>"0")         end    end

   def login_create        @login = Login.new(params[:login])         if request.get?             session[:login_id] = nil         else             puts 'logincretaeeeeeeeeeeeeeeeeeeeeeeeeee'             puts params[:login][:password]             params[:login][:password] = Login.hashed_password(params[:login][:password])             puts params[:login][:password]             @logincheck = Login.find_by_name_and_password(params[:login][:name],params[:login][:password])             if @logincheck == nil                 #@logincheck.save                 flash[:error] ="Name/Password not matching"                 redirect_to :controller=>'login', :action=>'login' and return             else                 session[:login_id] = @logincheck.id                 Login.update(@logincheck.id,:user_status=>"1")                 redirect_to :controller=>'prodtabs', :action=>'index' and return             end         end    end

   def category3         puts '*****category3****'         @categyid=request.raw_post         session[:category_id]=@categyid.to_i         puts @categyid.to_i         @catlist=Cattab1.find_all_by_id(@categyid.to_i)    end

   def category4         puts '*****category4****'         @productid=request.raw_post         puts @productid.to_i         @prodlist=Prodtab.find_all_by_id(@productid.to_i)    end

   def prod1         puts '*******prodids********'         puts params[:product_id]         puts '*********vijay********'         @prodcheck1=params[:product_id]         @prodcheck=Prodtab.find_all_by_id(@prodcheck1)         @prodcheckcatid=Prodtab.find_all_by_cattab1_id(@prodcheck1)         @prodcheck.each do|p|             if p.cattab1_id==0                Prodtab.update(p.id ,:cattab1_id=>session[:category_id])                 flash[:success] ="Product is assigned successfully"              else                 flash[:error] ="#{p.pname} is already assigned"                 redirect_to :controller=>'login', :action=>'addprod' and return             end         #end         end         redirect_to:controller=>'login', :action=>'addprod'     end end

views

<script type="text/javascript">   var txt1=new Array();   var txt2=new Array();   function compare1()   {       if(document.getElementById("login_name").value=="")       {           alert("Please enter the Login name");           document.getElementById("login_name").focus();           return false;       }       var checkStr = document.getElementById("login_name").value;       if(checkStr.length<2 || checkStr.length>6)       {           alert("Login Name should be minimum two characters and maximum Six characters");           document.getElementById("login_name").value="";           document.getElementById("login_name").focus();           return false;       }

      var checkOK = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";       var checkStr1= document.getElementById("login_name").value;       var checkStr2= document.getElementById("login_password").value;       var allValid = true;       var allValid1=true;       for (i = 0; i < checkStr.length; i++)       {           ch = checkStr.charAt(i);           for (j = 0; j < checkOK.length; j++)               if (ch == checkOK.charAt(j))                   break;           if (j == checkOK.length)           {               allValid = false; break;           }       }       if (!allValid)       {           alert("Please enter only letter and numeric characters in the \"Login Name\" field.");           document.getElementById("login_name").focus();           document.getElementById("login_name").value="";           return false;       }       if(document.getElementById("login_password").value=="")       {           alert("Please enter the Login Password");           document.getElementById("login_password").focus();           return false;       }       if(checkStr2.length<6 || checkStr2.length>10)       {           alert("Password should be minimum six characters and maximum Ten characters");           document.getElementById("login_password").value="";           document.getElementById("login_password").focus();           return false;       } return true; } </script>

<html>

<body style="background-color:#F7E4BA">     <b><h6 align="right"></h6>     <h3 align="center"><b> <font color="maroon">LOGIN FORM</font

</b></h3>

    <center><p style="color:red"><%= flash[:error] %></p></center>     <table align="center">           <tr>           <% form_tag({ :controller => "login", :action => "login_create"}, {:id=>"login", :name=>"login" ,:multipart => true}) do %>

          <tr><td><b>Login ID </b></td>           <td><%= text_field 'login','name' %></td>           </tr>

          <tr><td><b> Password </b></td>           <td><%= password_field 'login','password' %></td>           </tr>

          <tr>           <td></td><td align="left"> <input type="submit" value="Login" onclick ="return compare1();"><!--<%= submit_tag 'Login' %>-->

          <input type="reset" value="Clear"></td></tr>

          <% end %> </table> </body> </html>

model

class Login < ActiveRecord::Base validates_uniqueness_of :name

def self.hashed_password(password)    Digest::SHA1.hexdigest(password) end end