Image name not inserted into database in ruby on rails

问题

I have a problem to store image name into database. image upload to folder working fine but image name will not saved into db

Model code :

 class Post < ActiveRecord::Base
   attr_accessible :name, :imag
   attr_accessor :imag

  def self.save(upload)
    name = upload['imag'].original_filename
    directory = 'public/data'
    # render :text => directory
    # create the file path
    path = File.join(directory,name)
    # write the file
    File.open(path, "wb") { |f| f.write(upload['imag'].read)}
  end

end

Controller code:

  def create
    @a=params[:post][:imag].original_filename  /* how to pass in this image name into params[:post] */
    pos= Post.save(params[:post])
    if pos
      redirect_to :action =>"index"
    else
      redirect_to :action =>"posts"
    end
  end

Anyone guide me to archive this one. Thanks in advance.

回答1:

that's because your save helper conflicts with the ActiveRecord save and you're not even saving doing anything in that method.

call

super(upload) 

in your save method (should be the first line)

回答2:

You are overriding the ActiveRecord save method with your custom self.save class method. Also, I'd recommend using an upload gem like paperclip or something similar

回答3:

I have find the solution. Manually added image original file name in Post.create function.

Controller code :

 def create
            Post.super(params[:post])
            pos= Post.create(:name=>params[:post][:name],:image=>params[:post][:image].original_filename) /* here is added image value from uploaded input */
            if pos
              redirect_to :action =>"index"
            else
              redirect_to :action =>"posts"
            end

          end

Modle Code :

class Post < ActiveRecord::Base
   attr_accessible :name, :image

  #attr_accessor :imag
  def self.super(upload)
    name = upload['image'].original_filename
    directory = 'public/data'
   # render :text => directory
    # create the file path
    path = File.join(directory,name)
    # write the file
    File.open(path, "wb") { |f| f.write(upload['image'].read)}
  end

end

来源：https://stackoverflow.com/questions/19665395/image-name-not-inserted-into-database-in-ruby-on-rails