在Rails项目中,我有2个控制器:任务和产品。我想在views/tasks/_form.html.erb
中获取产品名称,form_tag
然后从数据库中找到产品的数据,并通过javascript将产品的详细信息显示给用户,而无需重新加载页面。我有以下代码:
task_controller:
class TasksController < ApplicationController
before_action :set_task, only: [:show, :edit, :update, :destroy]
before_filter :authenticate_user!
layout "task"
# GET /tasks
# GET /tasks.json
def show_product
@product = Product.all
end
def index
@tasks = Task.all
end
# GET /tasks/1
# GET /tasks/1.json
def show
end
# GET /tasks/new
def new
@list_of_category = Category.all
@list_of_product = Product.all
@reporter = Reporter.find(params[:reporter_id])
@task = Task.new
end
# GET /tasks/1/edit
def edit
@list_of_category = Category.all
@list_of_product = Product.all
end
# POST /tasks
# POST /tasks.json
def create
@task = Task.new(task_params)
@task.responsibility = current_user.responsibility
@task.reporter = @reporter
@task.date_time = Time.now
@task.trace_code = (Time.now.to_f * 1000).to_i
respond_to do |format|
if @task.save
format.html { redirect_to @task, notice: 'Task was successfully created.' }
format.json { render action: 'show', status: :created, location: @task }
else
format.html { render action: 'new' }
format.json { render json: @task.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /tasks/1
# PATCH/PUT /tasks/1.json
def update
respond_to do |format|
if @task.update(task_params)
format.html { redirect_to @task, notice: 'Task was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: @task.errors, status: :unprocessable_entity }
end
end
end
# DELETE /tasks/1
# DELETE /tasks/1.json
def destroy
@task.destroy
respond_to do |format|
format.html { redirect_to tasks_url }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_task
@task = Task.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def task_params
params.require(:task).permit(:responsibility_id, :reporter_id, :date_time, :trace_code, :status, :describe, :category_id, :product_id)
end
end
views / tasks / _form.html.erb
<%= form_tag 'tasks/show_product', :remote => true, :method => :get do %>
<%= text_field_tag :q %><br/>
<%= submit_tag %>
<% end %>
<div id="response">
</div>
视图/任务/show_product.js.erb
$("#response").html("<%= escape_javascript(render 'tasks/show_product') %>")
views / tasks / _show_product.html.erb
<h1>Test</h1>
routes.rb
match "/tasks/show_product" => "tasks#show_product" , :via => :get
但是当我单击时submit_tag
,产品名称不会发送form_tag
,也不会在页面上进行任何更改。
我单击时的系统日志submit_tag
:
Started GET "/tasks/show_product?utf8=%E2%9C%93&q=Product+1&commit=Save+changes" for 127.0.0.1 at 2014-05-04 13:35:36 +0430
Processing by TasksController#show as JS
Parameters: {"utf8"=>"✓", "q"=>"Product 1", "commit"=>"Save changes", "id"=>"show_product"}
Task Load (0.0ms) SELECT "tasks".* FROM "tasks" WHERE "tasks"."id" = ? LIMIT 1 [["id", "show_product"]]
Completed 404 Not Found in 2ms
ActiveRecord::RecordNotFound (Couldn't find Task with id=show_product):
app/controllers/tasks_controller.rb:85:in `set_task'
Rendered C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionpack-4.0.3/lib/action_dispatch/middleware/templates/rescues/_source.erb (0.0ms)
Rendered C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionpack-4.0.3/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.0ms)
Rendered C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionpack-4.0.3/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.0ms)
Rendered C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionpack-4.0.3/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (29.0ms)
问题出在哪儿?
这是您的错误:
ActiveRecord::RecordNotFound (Couldn't find Task with id=show_product)
问题基本上是您正在尝试加载show
操作。典型的原因是您在文件中声明之后已经声明了路径resources :tasks
routes.rb
试试这个:
#config/routes.rb
resources :tasks do
collection do
get :show_products
end
end
#app/views/tasks/_form.html.erb
<%= form_tag tasks_show_products_path, :remote => true, :method => :get do %>
这将为您提供collection
一条路线,然后您可以使用相应的路径助手来调用该路线。这应该可以工作,因为您当前的错误是由与show
操作的冲突引起的
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