ruby on rails - stack level too deep when uploading and resizing image using carrierwave and rmagick -

when commenting line "process :resize_to_fit => [200, 300]" in imageuploader class code working fine want resize image when uploading.

please help.

log:

started patch "/products/980190968" 127.0.0.1 @ 2014-06-03 11:35:08 +0530 processing productscontroller#update html   parameters: {"utf8"=>"✓", "authenticity_token"=>"d//km/eexmdwt7wtmsqpswnedgampzgz7i7hembuc3s=", "product"=>{"title"=>"with no image", "description"=>"asdasdasdasdasdasdasdsadasdasdasda", "image_url"=>#<actiondispatch::http::uploadedfile:0x2e936b0 @tempfile=#<tempfile:c:/users/ahmad/appdata/local/temp/rackmultipart20140603-1836-1098spu>, @original_filename="cs.jpg", @content_type="image/jpeg", @headers="content-disposition: form-data; name=\"product[image_url]\"; filename=\"cs.jpg\"\r\ncontent-type: image/jpeg\r\n">, "price"=>"39.90"}, "commit"=>"update product", "id"=>"980190968"}   user load (0.0ms)  select  "users".* "users"  "users"."id" = 4 limit 1   product load (1.0ms)  select  "products".* "products"  "products"."id" = $1 limit 1  [["id", 980190968]]   cart load (1.0ms)  select  "carts".* "carts"  "carts"."id" = $1 limit 1  [["id", 76]]    (0.0ms)  begin    (1.0ms)  rollback completed 500 internal server error in 108ms  systemstackerror (stack level deep):   actionpack (4.1.1) lib/action_dispatch/middleware/reloader.rb:79     rendered c:/ruby200/lib/ruby/gems/2.0.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/templates/rescues/_source.erb (2.0ms)   rendered c:/ruby200/lib/ruby/gems/2.0.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (2.0ms)   rendered c:/ruby200/lib/ruby/gems/2.0.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (2.0ms)   rendered c:/ruby200/lib/ruby/gems/2.0.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (118.0ms)   

here imageuploader class:

class imageuploader < carrierwave::uploader::base    # include rmagick or minimagick support:    include carrierwave::rmagick   # include carrierwave::minimagick    # choose kind of storage use uploader:   storage :file   # storage :fog    # sensible default uploaders meant mounted:   def store_dir     "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"   end    def default_url      "/images/defaults/notavailable.jpg"   end    # process files uploaded:   #process :resize_to_fit => [200, 300]    # images might use this:    def extension_white_list      %w(jpg jpeg gif png)    end  end 

and product model:

class product < activerecord::base   has_many :line_items   has_many :orders, through: :line_items   #has_and_belongs_to_many :categories   before_destroy :ensure_not_referenced_by_any_line_item    validates :title, :description, presence: true   validates :price, numericality: {greater_than_or_equal_to: 0.01}    validates :title, uniqueness: true   validates :image_url, allow_blank: true, format: {       with: %r{\.(gif|jpg|png)\z}i,       message: 'must url gif, jpg or png image.'   }   validates :title, length: {minimum: 10}    mount_uploader :image_url, imageuploader    def self.latest     product.order(:updated_at).last   end    private    # ensure there no line items referencing product   def ensure_not_referenced_by_any_line_item     if line_items.empty?       return true     else       errors.add(:base, 'line items present')       return false     end   end end 

i had similar problem. fix it, in gemfile this:

 gem 'rmagick', require: false 

instead of this:

 gem 'rmagick' 

restart server , try again.