CODEWITHSUNDEEP
ruby-on-railsruby
Carlos Morales
Carlos Morales

Reputation: 1149

How can sum complete string with number?

How can I save numbers before

Here is my table:

|products|
    int   varchar(10)
   |id|  |num_product| 
     1      0040

|customers|
   int   varchar(255)
   |id|    |name|     |state|
     1      ABC          0
     2      DEF          0
     3      GHI          0
     4      JKL          1

Here is the controller:

def new
  @customer = Customer.find(params[:id])
  @num= Product.first
  @other_value = Customer.count(:conditions=>['state=0'])
end

Here is my view:

<% (@num.num_product)+@other_value %>

But it returns 00403 instead of 0043. I tried this but I'm getting 403 without 00:

<% (@num.num_product.to_i)+@other_value.to_i %>

Also I tried this but is not the correct way:

<% "000"+(@num.num_product.to_i)+@other_value.to_i %>

Can somebody help me about this?

Upvotes: 2

Views: 714

Answers (1)

ichigolas
ichigolas

Reputation: 7735

Why dont you do:

"%04d" % (@num.num_product.to_i + 1)

Given @num.num_product #=> "0040" then:

"%04d" % ('0040'.to_i + 1)
=> "0041"

Upvotes: 4

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