试图找出如何使用Wicked Wizard gem为用户构建的对象获取Multi Step表单。我一直关注gem的github上的文档和这个question上的Scheem回答了自己，但是当我在向导的最后一步并试图提交时，我得到了一个禁止的方法错误。我在其他问题中看到，引用strong parameters，我也一直在使用它，并且不确定导致错误的原因。到目前为止，我有以下内容。
错误讯息：
ActiveModel::ForbiddenAttributesError (ActiveModel::ForbiddenAttributesError):
app/controllers/places/steps_controller.rb:14:in `update'
Started GET "/places/20/steps/id" for 127.0.0.1 at 2017-07-02 03:10:57 -0400
Processing by Places::StepsController#show as HTML
Parameters: {"place_id"=>"20", "id"=>"id"}
Place Load (183.0ms) SELECT "places".* FROM "places" WHERE "places"."id" = ? LIMIT ? [["id", 20], ["LIMIT", 1]]
Rendering places/steps/id.html.erb within layouts/application
Rendered places/steps/id.html.erb within layouts/application (851.5ms)
Completed 200 OK in 5753ms (Views: 4688.2ms | ActiveRecord: 183.0ms)
Started PUT "/places/20/steps/id" for 127.0.0.1 at 2017-07-02 03:11:24 -0400
Processing by Places::StepsController#update as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"/VrDWevWLY+A6841zIR5awBGopfnoXWxE8zf+6xkogJC6ufPQ+qYGp4Mg72N3Dlc547oSF/cXa4c/vMK+JU6qg==", "place"=>{"cost"=>"$100.00", "user_id"=>"1"}, "commit"=>"Complete", "place_id"=>"20", "id"=>"id"}
Place Load (14.9ms) SELECT "places".* FROM "places" WHERE "places"."id" = ? LIMIT ? [["id", 20], ["LIMIT", 1]]
(34.9ms) begin transaction
(0.1ms) rollback transaction
Completed 500 Internal Server Error in 212ms (ActiveRecord: 49.8ms)
ActiveModel::ForbiddenAttributesError (ActiveModel::ForbiddenAttributesError):
app/controllers/places/steps_controller.rb:14:in `update'
Schema.rb
ActiveRecord::Schema.define(version: 20170630190146) do
create_table "places", force: :cascade do |t|
t.string "name"
t.string "location"
t.string "cost"
t.date "available"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "user_id"
t.string "status"
t.index ["user_id"], name: "index_places_on_user_id"
end
create_table "users", force: :cascade do |t|
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "username"
t.string "password_digest"
end
end
place.rb
class Place < ApplicationRecord
belongs_to :user
validates :name, :location, :cost, :available, :presence => true, :if => :active?
def active?
status == 'active'
end
end
places_controller.rb
class PlacesController < ApplicationController
before_action :set_place, only: [:show, :edit, :update, :destroy]
# GET /places
# GET /places.json
def index
@places = Place.where.not(name: nil)
end
# GET /places/1
# GET /places/1.json
def show
end
# GET /places/new
def new
@place = Place.new
end
# GET /places/1/edit
def edit
end
# POST /places
# POST /places.json
def create
@place = Place.new
if @place.save(validate: false)
redirect_to place_step_path(place_id: @place.id, id: :date)
else
render new
end
end
# PATCH/PUT /places/1
# PATCH/PUT /places/1.json
def update
respond_to do |format|
if @place.update(place_params)
format.html { redirect_to @place, notice: 'Place was successfully updated.' }
format.json { render :show, status: :ok, location: @place }
else
format.html { render :edit }
format.json { render json: @place.errors, status: :unprocessable_entity }
end
end
end
# DELETE /places/1
# DELETE /places/1.json
def destroy
@place.destroy
respond_to do |format|
format.html { redirect_to places_url, notice: 'Place was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_place
@place = Place.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def place_params
params.require(:place).permit(:name, :location, :cost, :available, :user_id, :status)
end
end
steps_controller.rb
class Places::StepsController < ApplicationController
include Wicked::Wizard
steps :date, :id
def show
@place = Place.find(params[:place_id])
render_wizard
end
def update
@place = Place.find(params[:place_id])
params[:place][:status] = 'active' if step == steps.last
@place.update_attributes(params[:place])
render_wizard @place
end
def create
@place = Place.create
redirect_to wizard_path(steps.first, :place_id => @product.id)
end
private
end
的routes.rb
Rails.application.routes.draw do
root 'static_pages#home'
resources :places
resources :places do
resources :steps, controller: 'places/steps'
end
resources :users
# session routes
resources :sessions
get 'session/new'
get '/sessions/new', to: 'sessions#new'
post '/sessions/new', to: 'sessions#create'
get '/logout', to: 'sessions#destroy'
delete '/logout', to: 'sessions#destroy'
end
date.html.erb
<%= form_for @place, method: :put, url: wizard_path do |f| %>
<% if f.object.errors.any? %>
<div class="error-messages">
<% f.object.errors.full_messages.each do |error| %>
<p><%= error %></p>
<% end %>
</div>
<% end %>
<div class="h2">When Is Place available?</div>
<div class="fied">
<%= f.label "Date" %>
<%= f.date_select :available, start_year: 2017 %>
</div>
<div class="actions">
<%= f.submit "Next" %>
or <%= link_to "skip this step", next_wizard_path %>
</div>
<% end %>
id.html.erb
<%= form_for @place, method: :put, url: wizard_path do |f| %>
<% if f.object.errors.any? %>
<div class="error-messages">
<% f.object.errors.full_messages.each do |error| %>
<p><%= error %></p>
<% end %>
</div>
<% end %>
<div class="h2">
<div class="field">
<%= f.label "Cost" %>
<%= f.text_field :cost %>
</div>
<div class="field">
<%= f.label "Belongs to" %>
<%= f.text_field :user_id %>
</div>
</div>
<div class="actions">
<%= f.submit "Complete" %>
</div>
<% end %>
答案 0 :(得分：1)
::加载ActiveModel ForbiddenAttributesError （::加载ActiveModel ForbiddenAttributesError）
我相信update中的Places::StepsController方法是罪魁祸首。您在该方法中未使用 strong params。尝试将其更改为
def update
@place = Place.find(params[:place_id])
params[:place][:status] = 'active' if step == steps.last
@place.update_attributes(place_params) #here you should use strong params
render_wizard @place
end
在place_params
private
private
def place_params
params.require(:place).permit(:name, :location, :cost, :available, :user_id, :status)
end