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私のfile_fieldタグは、ファイル自体をコントローラに渡すのではなく、ファイル名を渡しています。私のユーザモデルでRails file_fieldタグだけが文字列ファイル名をコントローラに渡します
：
AvatarUploader：
class AvatarUploader < CarrierWave::Uploader::Base
include CarrierWave::MiniMagick
process resize_to_limit: [50, 50]
if Rails.env.production?
storage :fog
else
storage :file
end
def store_dir
"uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
end
def extension_white_list
%w(jpg, jpeg, gif, png)
end
end
とユーザーコントローラ：
before_action :logged_in_user, only: [:index, :edit, :update, :destroy, :following, :followers]
before_action :correct_user, only: [:edit, :update]
before_action :admin_user, only: [:destroy]
skip_before_action :verify_authenticity_token, only: [:create]
...
def update
@user = User.find(params[:id])
if @user.update_attributes user_params
flash[:success] = "Profile updated"
redirect_to user_path @user
else
render 'edit'
end
end
...
def user_params
params.require(:user).permit :name, :email, :password, :password_confirmation, :avatar
end
def correct_user
@user = User.find params[:id]
redirect_to root_path unless @user == current_user
end
def admin_user
redirect_to root_path unless current_user.admin?
end
ビューでフォーム：
<%= form_for(@user) do |f| %>
<%= render 'shared/error_messages', object: f.object %>
<%= f.label :name %>
<%= f.text_field :name, class: 'form-control' %>
<%= f.label :email %>
<%= f.email_field :email, class: 'form-control' %>
<%= f.label :password %>
<%= f.password_field :password, class: 'form-control' %>
<%= f.label :password_confirmation %>
<%= f.password_field :password_confirmation, class: 'form-control' %>
<% if @user.avatar? %>
<%= image_tag @user.avatar.url, size: "50x50" %>
<% else %>
<%= image_tag "stock_ava.png", size: "50x50" %>
<% end %>
<%= f.file_field :avatar, accept: 'image/jpeg,image/gif,image/png' %>
<%= f.submit yield(:button_text), class: "btn btn-primary" %>
<% end %>
コンソールでは、適切なActionDispatchではなく、「FinnJake.png」という属性が表示されています。
Processing by UsersController#update as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"h9tD/g2M1zJ5L4cnysIQwHCWxDdhhhJR1I9a9+FAWeT9aTXPte16Uyn8GvI4w23klfvYtTaLCDrGVonHfmFUag==", "user"=>{"name"=>"Example User", "email"=>"[email protected]", "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]", "avatar"=>"FinnJake.png"}, "commit"=>"Save Changes", "id"=>"1"}
User Load (0.1ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT ? [["id", 1], ["LIMIT", 1]]
User Load (0.1ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT ? [["id", 1], ["LIMIT", 1]]
CACHE User Load (0.0ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT ? [["id", 1], ["LIMIT", 1]]
(0.1ms) begin transaction
User Exists (0.3ms) SELECT 1 AS one FROM "users" WHERE LOWER("users"."email") = LOWER(?) AND ("users"."id" != ?) LIMIT ? [["email", "[email protected]"], ["id", 1], ["LIMIT", 1]]
SQL (1.1ms) UPDATE "users" SET "avatar" = ?, "updated_at" = ? WHERE "users"."id" = ? [["avatar", nil], ["updated_at", "2017-10-02 14:50:41.226691"], ["id", 1]]
(142.3ms) commit transaction
Redirected to https://rubyonrails-xxx.c9users.io/users/1
Completed 302 Found in 155ms (ActiveRecord: 144.1ms)
私は非常に新しいレールですが、file_fieldがファイルをアップロードしていない理由を理解できません。私はこのタグで終わることをブラウザで見ることができます：
<input accept="image/jpeg,image/gif,image/png" type="file" name="user[avatar]" id="user_avatar">
2.4.0 :002 > user = User.first
User Load (0.5ms) SELECT "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT ? [["LIMIT", 1]]
=> #<User id: 1, name: "Example User", email: "[email protected]", created_at: "2017-10-02 14:32:22", updated_at: "2017-10-02 16:35:55", password_digest: "$2a$10$sww7gItks0mYz6xz8zV.QOIjr6to/o5Jytjmuo0wxny...", remember_digest: nil, admin: true, activation_digest: "$2a$10$W396r7A8aZaii3DC7b3W7u70etSmXh3MORMIoWtcSHo...", activated_at: "2017-10-02 14:32:22", reset_digest: nil, reset_sent_at: nil, avatar: nil>
2.4.0 :003 > user.update avatar: "String"
(0.2ms) begin transaction
User Exists (0.4ms) SELECT 1 AS one FROM "users" WHERE LOWER("users"."email") = LOWER(?) AND ("users"."id" != ?) LIMIT ? [["email", "[email protected]"], ["id", 1], ["LIMIT", 1]]
SQL (2.4ms) UPDATE "users" SET "updated_at" = ?, "avatar" = ? WHERE "users"."id" = ? [["updated_at", "2017-10-02 17:27:06.097363"], ["avatar", nil], ["id", 1]]
(11.4ms) commit transaction
=> true
ご迷惑をお掛けしなくても、レールコンソールから手動でその列を更新することはできません。
あなたのフォームにhtml：{multipart：true}は必要ありませんか？私はあなたがペーパークリップで行うことを知っています。搬送波は絶対に使用しないでください。 –