hello good eve to all

how the form validation in rubyonrails and how to retrieve the image
from database and how to upload the image in rubyon rails

Sathiya wrote:

how the form validation in rubyonrails and how to retrieve the image
from database and how to upload the image in rubyon rails

through model u can validate.using moel valaidations
ex:validates_presence_of :name,:message=>"Required fields cannot be left
blank"

upload file by using in html
<%= file_column_field "manufacturer_document", "document"
,:class=>'txt_box_sall'%>

manufacturer_document ---- it denotes model name
document ------ denotes field name in db
in controller the code is
@manufacturer_document =
ManufacturerDocument.new(params[:manufacturer_document])
@manufacturer_document.save

now your doubt clears!