您好我正在尝试创建一个表单,同时创建一个列表并将产品与其关联。
问题在于表格不断提升
错误的参数数量(0表示1)
提取的来源(第10行):
7: <%= f.text_area :description, placeholder:
8: "Compose a description for it ..." %>
9: </div>
10: <%= l.fields_for :products do |builder| %>
11: <%= render 'shared/product_form', :l => builder %>
12: <% end %>
13: <%= l.submit "Create", class: "btn btn-large btn-primary" %>
App Trace是
app/views/shared/_list_form.html.erb:10:in `block in _app_views_shared__list_form_html_erb__184644094_33330696'
app/views/shared/_list_form.html.erb:1:in `_app_views_shared__list_form_html_erb__184644094_33330696'
app/views/lists/new.html.erb:7:in `_app_views_lists_new_html_erb__973495114_33282228'
代码如下:
--- ----视图
- list_form -
<%= form_for(@list) do |f| %>
<%= render 'shared/error_messages', object: f.object %>
<div class="field">
<%= f.text_field :name, placeholder:
"Come up with a name for your list" %>
<%= f.text_area :description, placeholder:
"Compose a description for it ..." %>
</div>
<%= f.fields_for :products do |builder| %>
<%= render 'shared/product_form', :f => builder %>
<% end %>
<%= f.submit "Create", class: "btn btn-large btn-primary" %>
<% end %>
- product_form -
<%= f.text_field :name, "Name:" %>
<%= f.text_area :description, :rows => 3 %>
--- ---模型
- 列表 -
class List < ActiveRecord::Base
attr_accessible :description, :name
belongs_to :user
has_many :products, :dependent => :destroy
accepts_nested_attributes_for :products, :reject_if => lambda { |a| a[:name].blank? }, :allow_destroy => true
has_many :list_categorization
has_many :category, :through => :list_categorization
validates :user_id, presence: true
validates :name, presence: true, length: {maximum: 10}
validates :description, length: {maximum: 140}
default_scope order: 'lists.created_at DESC'
def categorize!(category_id)
list_categorization.create!(category_id: category_id)
end
end
- 产品 -
class Product < ActiveRecord::Base
attr_accessible :description, :donated, :name
validates :list_id, presence: true
belongs_to :list
end
--- ---控制器 --list_controller -
def new
@list = List.new
@products = @list.products.build
end
def create
@list = current_user.lists.build(params[:list]) if signed_in?
if @list.save
flash[:success] ="List " + @list.name + "created!"
render 'new'
end
- product_controller -
def new
@product = Product.new
end
def create
@product = @product.build(params[:product]) if signed_in?
if @product.save
flash[:success] ="Product " + @product.name + "created!"
end
你是对的,我在发布此内容后实际意识到了这一点,但现在在尝试提交表单时会发生这种情况:
表单包含1个错误。 *名称不能为空
事件艰难我填写正确,这就是通过
---!ruby / hash:ActiveSupport :: HashWithIndifferentAccess utf8:✓ authenticity_token:38CXjVORlj2RBgoTetIMoHomcVgOIlBU5rW3NTgkRkU = list:!ruby / hash:ActiveSupport :: HashWithIndifferentAccess 名单 说明:这是一个清单 products_attributes:!ruby / hash:ActiveSupport :: HashWithIndifferentAccess '0':! ruby / hash:ActiveSupport :: HashWithIndifferentAccess 名称:p1 描述:这是一个产品 提交:创建 行动:创造 控制器:列表
答案 0 :(得分:1)
l
来自哪里?我很确定你需要将其更改为f
:
<%= form_for(@list) do |f| %>
<%= render 'shared/error_messages', object: f.object %>
<div class="field">
<%= f.text_field :name, placeholder: "Come up with a name for your list" %>
<%= f.text_area :description, placeholder: "Compose a description for it ..." %>
</div>
<%= f.fields_for :products do |builder| %>
<%= render 'shared/product_form', :l => builder %>
<% end %>
<%= f.submit "Create", class: "btn btn-large btn-primary" %>
<% end %>
您的代码存在一些问题。首先,当你致电@list = current_user.lists.build(params[:list]) if signed_in?
时,这意味着如果没有用户登录,则根本不会创建该对象。执行此类操作的正确方法是使用控制器中的before_filter
。
其次@product = @product.build(params[:product])
不起作用。您尚未初始化Product
对象,但尚未将其分配给@product
。 build
也用于关联。您需要将其更改为@product = Product.new(params[:product])
。
列出控制器:
before_filter :user_signed_in? # add to products controller as well
# if you need this filter only on certain actions then do:
# before_filter :user_signed_in?, only: [:new, :create]
def new
@list = current_user.lists.build
@products = @list.products.build
end
def create
@list = current_user.lists.build(params[:list])
if @list.save
flash[:success] = "List " + @list.name + " created!"
redirect_to lists_path # this part was missing!
else # this was also missing
render 'new'
end # you had an 'if' with no 'end'
end
private
# add the following to Products controller as well, or if you
# use it a lot then place it in your application controller
def user_signed_in?
unless signed_in?
flash[:notice] = "You must first sign in"
redirect_to sign_in_path
end
end
产品控制器:
def new
@product = Product.new
end
def create
@product = Product.new(params[:product]
if @product.save
flash[:success] = "Product " + @product.name + " created!"
redirect_to @product
else
render 'new'
end
end
据我记得,在通过嵌套表单保存产品时不会使用products#create
操作,列表#create操作将用于两者。
要了解有关嵌套表单的更多信息,请查看these railscasts。
一旦您更新了代码并浏览了这些视频,如果您仍然遇到错误,我建议您创建一个新问题,因为这个问题已经变得冗长而混乱:)
答案 1 :(得分:0)
rails generate migration add_remember_token_to_users