how to insert image field on reply form in forum app en ruby on rails? - image

Question

i try to add the image field on reply form in my new app type forum.
the app containt the principal sujet and all users connected can reply on section replie.
now , i try to add the image field more older text field.
i use carrierwave to implement the feature.
but i receives this error message in terminal:
NoMethodError - undefined method `reimage_will_change!' for #
<Reply:0x000055cb9f2abc30>
Did you mean? Reimage_will_change!:
app/controllers/replies_controller.rb:8:in `create'
why subjection rails: reimage_will_change:
my i used "reimage" that variable field.
see complet message termianl:
Started POST "/discussions/pourquoi-intel-a-t-il-du-mal-a-suivre-la-loi-de-moore-la-loi-de-moore-est-elle-morte/replies" for ::1 at 2019-07-04 10:12:20 +0000
(1.5ms) SELECT "schema_migrations"."version" FROM "schema_migrations" ORDER BY "schema_migrations"."version" ASC
↳ /home/chatln/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/log_subscriber.rb:98
Processing by RepliesController#create as JS
Parameters: {"utf8"=>"✓", "reply"=>{"reply"=>"Amazon CEO Jeff Bezos gave this advice to those ", "reimage"=>#<ActionDispatch::Http::UploadedFile:0x000055d560cc1150 #tempfile=#<Tempfile:/tmp/RackMultipart20190704-14120-1uwpx6n.png>, #original_filename="Capture d’écran de 2019-06-10 11-08-07.png", #content_type="image/png", #headers="Content-Disposition: form-data; name=\"reply[reimage]\"; filename=\"Capture d\xE2\x80\x99\xC3\xA9cran de 2019-06-10 11-08-07.png\"\r\nContent-Type: image/png\r\n">}, "commit"=>"Envoyer", "discussion_id"=>"pourquoi-intel-a-t-il-du-mal-a-suivre-la-loi-de-moore-la-loi-de-moore-est-elle-morte"}
User Load (1.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 1], ["LIMIT", 1]]
↳ /home/chatln/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/log_subscriber.rb:98
Discussion Load (0.8ms) SELECT "discussions".* FROM "discussions" WHERE "discussions"."slug" = $1 LIMIT $2 [["slug", "pourquoi-intel-a-t-il-du-mal-a-suivre-la-loi-de-moore-la-loi-de-moore-est-elle-morte"], ["LIMIT", 1]]
####
↳ app/controllers/replies_controller.rb:55
Completed 500 Internal Server Error in 225ms (ActiveRecord: 24.9ms)
####
NoMethodError - undefined method `reimage_will_change!' for #<Reply:0x00007ffb6c716fa0>
Did you mean? Reimage_will_change!:
app/controllers/replies_controller.rb:8:in `create'
I think the error comes from line 55 of the replies controller at the level of set_discussion.
def set_discussion
#discussion = Discussion.friendly.find(params[:discussion_id])
end
and replies_controller complet
class RepliesController < ApplicationController
before_action :authenticate_user!
before_action :set_reply, only: [:edit, :update, :show, :destroy]
before_action :set_discussion, only: [:create, :edit, :show, :update, :destroy]
#before_action :find_discussions, only: [:create, :edit, :show, :update, :destroy]
def create
#reply = #discussion.replies.create(params[:reply].permit(:reply, :reimage, :discussion_id))
#reply.user_id = current_user.id
respond_to do |format|
if #reply.save
format.html { redirect_to discussion_path(#discussion) }
format.js # renders create.js.erb
else
format.html { redirect_to discussion_path(#discussion), notice: "Reponse non enregistrée, ressayer encore."}
format.js
end
end
end
def new
end
def destroy
#reply = #discussion.replies.find(params[:id])
#reply.destroy
redirect_to discussion_path(#discussion)
end
def edit
#discussion = Discussion.find(params[:discussion_id])
#reply = #discussion.replies.find(params[:id])
end
def update
#reply = #discussion.replies.find(params[:id])
respond_to do |format|
if #reply.update(reply_params)
format.html { redirect_to discussion_path(#discussion), notice: 'Reponse mise a jour...' }
else
format.html { render :edit }
format.json { render json: #reply.errors, status: :unprocessable_entity }
end
end
end
def show
end
private
def set_discussion
#discussion = Discussion.friendly.find(params[:discussion_id])
end
def set_reply
#reply = Reply.find(params[:id])
end
def reply_params
params.require(:reply).permit(:reply, :reimage, :discussion_id)
end
end
and model replies
class Reply < ApplicationRecord
mount_uploader :reimage, ReimageUploader
belongs_to :discussion
belongs_to :user
validates :reply, presence: true
extend FriendlyId
friendly_id :reply, use: [:slugged, :finders]
def should_generate_new_friendly_id?
reply_changed?
end
end

Answer 1

undefined method `x_will_change!' for # occures if you forget to add a column in your model's db table. If you have a model Reply and a ReimageUploader, with the uploader mounted as in the Carrierwave docs:
class Reply < ActiveRecord::Base
mount_uploader :reimage, ReimageUploader
end
Then the error will read
undefined method `reimage_will_change!' for #
To fix it add a column in a migration run the following in the console:
rails g migration AddReimageToUsers reimage:string
This will generate the following migration:
class AddReimageToUsers < ActiveRecord::Migration
def change
add_column :replies, :reimage, :string
end
end
Migrate it to apply the change (write down the below command in the console):
rake db:migrate