我在使用 rails 的表单时遇到问题
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【中文标题】我在使用 rails 的表单时遇到问题【英文标题】：I am having trouble with the form in rails 【发布时间】：2021-07-13 12:40:05 【问题描述】：如何在标签模型中存储图像标签。我有相册控制器，其中我在显示页面上有图像.. 在那些特定的图像中，我想在输入时保存标签。 我的相册控制器：
class AlbumsController < ApplicationController
before_action :authenticate_user!
def index
@albums = current_user.albums.all
end
def show
@album= current_user.albums.find(params[:id])
end
def new
@album = current_user.albums.new
end
def create
@album = current_user.albums.new(album_params)
if @album.save
redirect_to albums_path
else
render :new
end
end
def edit
@album =current_user.albums.find(params[:id])
end
def update
@album = current_user.albums.find(params[:id])
if @album.update(album_params)
redirect_to albums_path
else
render :edit
end
end
def destroy
@album = current_user.albums.find(params[:id])
@album.destroy
redirect_to albums_path
end
def delete_image_attachment
@image = ActiveStorage::Attachment.find(params[:id])
@image.purge
redirect_to albums_path
end
private
def album_params
params.require(:album).permit(:title, :desciption, images: [])
end
end
我的 routes.rb 文件：
Rails.application.routes.draw do
devise_for :users
root to: "albums#index"
resources :albums do
member do
delete :delete_image_attachment
end
resources :comments
resources :tags
end
end
铁路路线是：
new_user_session GET /users/sign_in(.:format) devise/sessions#new
user_session POST /users/sign_in(.:format) devise/sessions#create
destroy_user_session DELETE /users/sign_out(.:format) devise/sessions#destroy
new_user_password GET /users/password/new(.:format) devise/passwords#new
edit_user_password GET /users/password/edit(.:format) devise/passwords#edit
user_password PATCH /users/password(.:format) devise/passwords#update
PUT /users/password(.:format) devise/passwords#update
POST /users/password(.:format) devise/passwords#create
cancel_user_registration GET /users/cancel(.:format) devise/registrations#cancel
new_user_registration GET /users/sign_up(.:format) devise/registrations#new
edit_user_registration GET /users/edit(.:format) devise/registrations#edit
user_registration PATCH /users(.:format) devise/registrations#update
PUT /users(.:format) devise/registrations#update
DELETE /users(.:format) devise/registrations#destroy
POST /users(.:format) devise/registrations#create
root GET / albums#index
delete_image_attachment_album DELETE /albums/:id/delete_image_attachment(.:format) albums#delete_image_attachment
album_comments GET /albums/:album_id/comments(.:format) comments#index
POST /albums/:album_id/comments(.:format) comments#create
new_album_comment GET /albums/:album_id/comments/new(.:format) comments#new
edit_album_comment GET /albums/:album_id/comments/:id/edit(.:format) comments#edit
album_comment GET /albums/:album_id/comments/:id(.:format) comments#show
PATCH /albums/:album_id/comments/:id(.:format) comments#update
PUT /albums/:album_id/comments/:id(.:format) comments#update
DELETE /albums/:album_id/comments/:id(.:format) comments#destroy
album_tags GET /albums/:album_id/tags(.:format) tags#index
POST /albums/:album_id/tags(.:format) tags#create
new_album_tag GET /albums/:album_id/tags/new(.:format) tags#new
edit_album_tag GET /albums/:album_id/tags/:id/edit(.:format) tags#edit
album_tag GET /albums/:album_id/tags/:id(.:format) tags#show
PATCH /albums/:album_id/tags/:id(.:format) tags#update
PUT /albums/:album_id/tags/:id(.:format) tags#update
DELETE /albums/:album_id/tags/:id(.:format) tags#destroy
albums GET /albums(.:format) albums#index
POST /albums(.:format) albums#create
new_album GET /albums/new(.:format) albums#new
edit_album GET /albums/:id/edit(.:format) albums#edit
album GET /albums/:id(.:format) albums#show
PATCH /albums/:id(.:format) albums#update
PUT /albums/:id(.:format) albums#update
DELETE /albums/:id(.:format) albums#destroy
rails_postmark_inbound_emails POST /rails/action_mailbox/postmark/inbound_emails(.:format) action_mailbox/ingresses/postmark/inbound_emails#create
rails_relay_inbound_emails POST /rails/action_mailbox/relay/inbound_emails(.:format) action_mailbox/ingresses/relay/inbound_emails#create
rails_sendgrid_inbound_emails POST /rails/action_mailbox/sendgrid/inbound_emails(.:format) action_mailbox/ingresses/sendgrid/inbound_emails#create
rails_mandrill_inbound_health_check GET /rails/action_mailbox/mandrill/inbound_emails(.:format) action_mailbox/ingresses/mandrill/inbound_emails#health_check
rails_mandrill_inbound_emails POST /rails/action_mailbox/mandrill/inbound_emails(.:format) action_mailbox/ingresses/mandrill/inbound_emails#create
rails_mailgun_inbound_emails POST /rails/action_mailbox/mailgun/inbound_emails/mime(.:format) action_mailbox/ingresses/mailgun/inbound_emails#create
rails_conductor_inbound_emails GET /rails/conductor/action_mailbox/inbound_emails(.:format) rails/conductor/action_mailbox/inbound_emails#index
POST /rails/conductor/action_mailbox/inbound_emails(.:format) rails/conductor/action_mailbox/inbound_emails#create
new_rails_conductor_inbound_email GET /rails/conductor/action_mailbox/inbound_emails/new(.:format) rails/conductor/action_mailbox/inbound_emails#new
edit_rails_conductor_inbound_email GET /rails/conductor/action_mailbox/inbound_emails/:id/edit(.:format) rails/conductor/action_mailbox/inbound_emails#edit
rails_conductor_inbound_email GET /rails/conductor/action_mailbox/inbound_emails/:id(.:format) rails/conductor/action_mailbox/inbound_emails#show
PATCH /rails/conductor/action_mailbox/inbound_emails/:id(.:format) rails/conductor/action_mailbox/inbound_emails#update
PUT /rails/conductor/action_mailbox/inbound_emails/:id(.:format) rails/conductor/action_mailbox/inbound_emails#update
DELETE /rails/conductor/action_mailbox/inbound_emails/:id(.:format) rails/conductor/action_mailbox/inbound_emails#destroy
new_rails_conductor_inbound_email_source GET /rails/conductor/action_mailbox/inbound_emails/sources/new(.:format) rails/conductor/action_mailbox/inbound_emails/sources#new
rails_conductor_inbound_email_sources POST /rails/conductor/action_mailbox/inbound_emails/sources(.:format) rails/conductor/action_mailbox/inbound_emails/sources#create
rails_conductor_inbound_email_reroute POST /rails/conductor/action_mailbox/:inbound_email_id/reroute(.:format) rails/conductor/action_mailbox/reroutes#create
rails_service_blob GET /rails/active_storage/blobs/redirect/:signed_id/*filename(.:format) active_storage/blobs/redirect#show
rails_service_blob_proxy GET /rails/active_storage/blobs/proxy/:signed_id/*filename(.:format) active_storage/blobs/proxy#show
GET /rails/active_storage/blobs/:signed_id/*filename(.:format) active_storage/blobs/redirect#show
rails_blob_representation GET /rails/active_storage/representations/redirect/:signed_blob_id/:variation_key/*filename(.:format) active_storage/representations/redirect#show
rails_blob_representation_proxy GET /rails/active_storage/representations/proxy/:signed_blob_id/:variation_key/*filename(.:format) active_storage/representations/proxy#show
GET /rails/active_storage/representations/:signed_blob_id/:variation_key/*filename(.:format) active_storage/representations/redirect#show
rails_disk_service GET /rails/active_storage/disk/:encoded_key/*filename(.:format) active_storage/disk#show
update_rails_disk_service PUT /rails/active_storage/disk/:encoded_token(.:format) active_storage/disk#update
rails_direct_uploads POST /rails/active_storage/direct_uploads(.:format) active_storage/direct_uploads#create
我的标签控制器：
class TagsController < ApplicationController
def create
@image = ActiveStorage::Blob.find(params[:image_id])
tags = params[:tag_name]
tags.each do |tag|
image = params[:image_id]
@tag = Tag.create(tag_name:tag,image_id:image)
redirect_to album_path(@album)
end
end
end
我的标签模型：
class Tag < ApplicationRecord
belongs_to :image
end
这是我的显示页面（其中一半）出现错误：
<%= form_for(@tag, url: album_tags_path(@album) ) do |form|%>
<div class="modal fade" id="exampleModal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalLabel">Enter Tags for your Image here</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<div class="tag-container d-flex flex-wrap">
<input class="form-control py-4 px-3" />
</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<%= form.submit class:"btn btn-info"%>
</div>
</div>
</div>
</div>
<% end %>
form_for url 有什么问题？？？ 我收到错误
ArgumentError in Albums#show
【问题讨论】：
【参考方案1】：让 Rails 推断路线怎么样
<%= form_for([@album , @tag]) do |form| %>
【讨论】：
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