carrierwave not saving image - ruby-on-rails

Question

i'm using Angularjs as front end,
i'm able to upload image along with some parameters .
i'm using this directive angular-file-upload to upload single image with parameters:
uploader = $scope.uploader = new FileUploader(
url: '/recipes',
alias: 'cover',
removeAfterUpload: true,
#transformRequest: angular.identity,
headers: {'X-CSRF-TOKEN': csrf_token,'accept': 'application/json'},
withCredentials: true
)
uploader.onBeforeUploadItem = (item)->
#data = angular.toJSON($scope.recipe)
item.formData.push("recipe": angular.toJson($scope.recipe))
#item.upload()
console.info('uploader', $scope.uploader);
uploader.uploadAll()
this is the create action:
def create
params[:recipe] = JSON.parse params[:recipe]
params[:recipe][:cover] = params[:cover]
#ingredients = Ingredient.where(:id => params[:recipe][:ingredients].map {|ingredient| ingredient[:id]})
#recipe = current_user.recipes.new(params.require(:recipe).permit(:name,:instructions))
#recipe.ingredients << #ingredients
#recipe.user_id = current_user.id
#recipe.save
render 'show', status: 201
end
recipe model :
class Recipe < ActiveRecord::Base
mount_uploader :cover, AvatarUploader
belongs_to :user
has_and_belongs_to_many :ingredients,:join_table => "ingredients_recipes"
accepts_nested_attributes_for :ingredients
attr_accessor :cover
end
this is the request :
-----------------------------100101598926016265538511946
Content-Disposition: form-data; name="recipe"
{"name":"amzpld","instructions":"mpzmdpzmez","ingredients":[{"id":3,"title":"oeuf"}]}
-----------------------------100101598926016265538511946
Content-Disposition: form-data; name="cover"; filename="10.jpg"
Content-Type: image/jpeg
ÿØÿà�JFIF������ÿÛ�� ( %"1"%),...383,7(-.+
0& $,,,2,,,,,,4,4,,,,,,,,,-,,,,,,,,,,,4,,,,,,,,,,,,,,,ÿÀ��¨,"�ÿÄ�������������
�ÿÄ�#�����!1AQa"q2¡±#BRÁáð3bÑr$ñCT¢ÿÄ��������������
ÿÄ�0�������!1A"Qaq¡2±#B3CÑáðÿÚ���?�öá]®Qâ1 Bs(À¡V_D$¯8þ&¡i6¨Û)Ò
´oóçÊ�dÌôªçñEÏêÚÙ]ëãzn£hÓÚêÄ6I½&&·¼ßËðȨ̈)L¤hGQÞ°Pf�MÔúSkÔBønàôÕjal3YðäKÇÖ¾Á¢#..........
the recipe is saved but with cover = nil
plz what i'm missing

Answer 1

You're making :cover part of your params[:recipe] hash:
params[:recipe][:cover] = params[:cover]
But you're not white-listing it, so instead of:
#recipe = current_user.recipes.new(params.require(:recipe).permit(:name,:instructions))
Try this:
#recipe = current_user.recipes.new(params.require(:recipe).permit(:name, :instructions, :cover))
update
You also have another issue in your Recipe model, you're using:
attr_accessor :cover
Remove that line, you don't need it because cover should be a real column in your recipes table, and if that column already exists this will override the method that assigns values to that column, thus causing your column to contain nil.
Now if you don't have that column in your recipes table, just add it using a migration, in your console type:
rails g migration add_cover_to_recipes cover:string
and then migrate:
rake db:migrate
Hope that solves your issue.