【发布时间】：2019-09-24 11:59:48
【问题描述】：
我的困境已经持续了一周，我正在努力解决它，但到目前为止我还没有解决，所以我正在寻求帮助。
我有一个模型经销商和其他嵌套（DealershipsSetting、地址、机器、操作员、卡），其中 has_one 关系仅适用于 DealershipsSetting，因此其他是 has_many。 我只能在数据库表中写入一些信息，当我为嵌套表单的每个模型调用构建方法时，例如：
def new
@dealership = Dealership.new
@ dealership.build_dealerships_setting if @ dealership.dealerships_setting.blank?
@ dealership.addresses.build if @ dealership.addresses.blank?
...
end
def edit
@ dealership.build_dealerships_setting if @ dealership.dealerships_setting.blank?
@ dealership.addresses.build if @ dealership.addresses.blank?
...
end
我意识到：
a) 我在日志中注意到的第一件事是表单被重定向了多次。这是有道理的，因为我强迫他们通过 builds 调用来构建（至少我是这么理解的）。但这不是使用 gem 时的默认行为，我在另一个应用程序中进行了测试，只是为了了解如何使用 gem，遵循文档https://github.com/nathanvda/cocoon
b) 由于调用了build方法，表单打开（准备接收数据），不知道是不是默认行为。
c) 当我调用 Action New 或 Edit 时，我不能记录多个记录（类型、2 个地址、3 个卡或 N 个运算符）
d) 在文档中我没有注意到对 build 方法的任何调用，我在搜索中发现试图解决我的问题，例如，https://share.atelie.software/rails-nested-attributes-com-has-many-42ecf6179871
e) 如果我按照文档中提供的示例从构建中删除调用，则在您通过 link_to_add_association 调用之前，这些字段将显示为隐藏状态，但不会保存嵌套表单中的任何数据。
当我这样设置我的dealerships_controller 时，我无法在数据库中添加任何寄存器：
def new
@dealership = Dealership.new
end
...
def create
@dealership = Dealership.new(dealership_params)
respond_to do |format|
if @dealership.save
format.html { redirect_to users_backend_dealerships_path, notice: 'Dealership was successfully created.' }
format.json { render :show, status: :created, location: @dealership }
else
format.html { render :new }
format.json { render json: @dealership.errors, status: :unprocessable_entity }
end
end
end
....
def dealership_params
params.require(:dealership).permit(
:fantasy_name, :social_name, :cpf, :cnpj, :municipal_registration, :state_registration, :credit, :phone, :manager_email, :is_available, :credits_package_id, dealerships_setting_attributes: [:id, :credit_alert, :contract_validity, :franchise_for_rent, :due_date, :credit_value, :is_available, :_destroy],addresses_attributes: [:id, :place, :neighborhood, :cep, :state, :city, :is_available, :_destroy], machines_attributes: [:id, :name, :model, :serial_number, :mac_address, :calibration_counter, :is_available, :_destroy], operators_attributes: [:id, :name, :cpf, :card, :is_available, :_destroy ], cards_attributes: [:id, :serial, :category, :credit_package, :client, :machine, :operator, :is_available, :_destroy ])
end
这样，我可以在数据库中按型号添加一个寄存器。
dealerships_controller
class UsersBackend :: DealershipsController <UsersBackendController
before_action: set_dealership, only: [: show,: edit,: update,: destroy]
before_action: get_credit_packages, only: [: edit,: update,: new]
def index
@dealerships = Dealership.includes(:dealerships_setting, :addresses, :machines, :operators, :cards)
end
def show
end
def add_credits
end
def new
@dealership = Dealership.new
@dealership.build_dealerships_setting if @dealership.dealerships_setting.blank?
@dealership.addresses.build if @dealership.addresses.blank?
@dealership.machines.build if @dealership.machines.blank?
@dealership.operators.build if @dealership.operators.blank?
@dealership.cards.build if @dealership.cards.blank?
end
def edit
@dealership.build_dealerships_setting if @dealership.dealerships_setting.blank?
@dealership.addresses.build if @dealership.addresses.blank?
@dealership.machines.build if @dealership.machines.blank?
@dealership.operators.build if @dealership.operators.blank?
@dealership.cards.build if @dealership.cards.blank?
end
def create
@dealership = Dealership.new(dealership_params)
respond_to do |format|
if @dealership.save
format.html { redirect_to users_backend_dealerships_path, notice: 'Dealership was successfully created.' }
format.json { render :show, status: :created, location: @dealership }
else
format.html { render :new }
format.json { render json: @dealership.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if @dealership.update(dealership_params)
format.html { redirect_to users_backend_dealerships_path, notice: 'Dealership was successfully updated.' }
format.json { render :show, status: :ok, location: @dealership }
else
format.html { render :edit }
format.json { render json: @dealership.errors, status: :unprocessable_entity }
end
end
end
def destroy
@dealership.destroy
respond_to do |format|
format.html { redirect_to users_backend_dealerships_path, notice: 'Dealership was successfully destroyed.' }
format.json { head :no_content }
end
end
private
def set_dealership
@dealership = Dealership.find(params[:id])
end
def dealership_params
params.require(:dealership).permit(:fantasy_name, :social_name, :cpf, :cnpj, :municipal_registration, :state_registration, :credit, :phone, :manager_email, :is_available, :credits_package_id,
dealerships_setting_attributes: [:id, :credit_alert, :contract_validity, :franchise_for_rent, :due_date, :credit_value, :is_available, :_destroy],
addresses_attributes: [:id, :place, :neighborhood, :cep, :state, :city, :is_available, :_destroy],
machines_attributes: [:id, :name, :model, :serial_number, :mac_address, :calibration_counter, :is_available, :_destroy],
operators_attributes: [:id, :name, :cpf, :card, :is_available, :_destroy ],
cards_attributes: [:id, :serial, :category, :credit_package, :client, :machine, :operator, :is_available, :_destroy ]
)
end
def get_credit_packages
@credit_packages = CreditsPackage.where(media_owner: 0)
end
end
模型经销商.rb
class Dealership < ApplicationRecord
has_many :credits_packages
has_one :dealerships_setting, dependent: :destroy, inverse_of: :dealership
has_many :addresses, dependent: :destroy, inverse_of: :dealership
has_many :machines, dependent: :destroy, inverse_of: :dealership
has_many :operators, dependent: :destroy, inverse_of: :dealership
has_many :cards, dependent: :destroy, inverse_of: :dealership
accepts_nested_attributes_for :dealerships_setting, reject_if: :all_blank, allow_destroy: true
accepts_nested_attributes_for :addresses, reject_if: :all_blank, allow_destroy: true
accepts_nested_attributes_for :machines, reject_if: :all_blank, allow_destroy: true
accepts_nested_attributes_for :operators, reject_if: :all_blank, allow_destroy: true
accepts_nested_attributes_for :cards, reject_if: :all_blank, allow_destroy: true
accepts_nested_attributes_for :users, reject_if: :all_blank, allow_destroy: true
end
模型经销商设置
class DealershipsSetting < ApplicationRecord
belongs_to :dealership, inverse_of: :dealerships_setting
end
型号地址.rb
class Address < ApplicationRecord
belongs_to :dealership
end
form.html.erb（经销商）
<%= form_with(model: [ :users_backend, @dealership], local: true) do |form| %>
<div class="form-group">
<strong><%= form.label :fantasy_name %></strong>
<%= form.text_field :fantasy_name, autofocus: true, class:"text-uppercase form-control", placeholder:t('place_holders.fantasy_name') %>
</div>
...
<%= form.fields_for :dealerships_setting, @dealership.dealerships_setting do |dealerships_setting| %>
<%= render partial: 'dealerships_setting_fields', locals: { f: dealerships_setting } %>
<% end %>
<div id="addresses">
<%= form.fields_for :addresses do |address| %>
<%= render partial: 'address_fields', locals: { f: address } %>
<% end %>
<%= link_to_add_association('Add address', form, :addresses) %>
</div>
....others nested forms...
_dealerships_setting_fields.html.erb
<div class="nested-fields">
<div class="form-group">
<strong><%= f.label :contract_validity %></strong>
<%= f.text_field :contract_validity, class:"form-control ", placeholder:t('place_holders.contract_validity') %>
</div> ...another fields...
_address_fields.html.erb
<div class='nested-fields'>
<div class='form-group'>
<strong><%= f.label :place %></strong>
<%= f.text_field :place, class:"text-uppercase form-control", placeholder:t('place_holders.place') %>
</div> ...another fields...
我需要什么？ A - 管理经销商，他们必须有一种配置和一个或多个地址、机器、操作员和卡。
我会非常感谢任何可以帮助我的人。
【问题讨论】：
-
我知道这没什么用，但有时我发现嵌套属性不起作用。但只有有时。所以我创建了辅助方法来循环并创建相关的记录。我坚持使用
fields_for，但有时，它对我不起作用:( -
非常感谢@MikeHeft 我仍然希望有一个解决方案，我认为它可能存在。 ;)
-
请解释一下：如果你说“添加一个寄存器”，你的意思是保存一个记录吗？您能否显示日志文件，表单重定向不应该由“构建”（它只是预先创建数据）引起，并且日志文件希望向我们展示更多信息，为什么不保存记录？我很好奇参数是如何发布的，强参数定义必须正确匹配。
-
嗨，@nathanvda 非常感谢您的帮助。首先，我想说我是 web 开发的初学者，我认为是可以感知的 :) 所以，如果你可以检查一下，我做了一个要点，这是链接 gist.github.com/jonaslucena/b7f44bd17d5b3f35705aa94633a1ef31 关于你的问题，对不起我的穷人英语，我会尽量回答得更好。是的，我想说“保存新记录”。关于我明天可以发送的日志文件，好吗？感谢您的支持，非常感谢！最好的问候
-
代码对我来说一切都很好（但它很多，所以我当然可以忽略错误）。我能想到的唯一事情：验证失败或强参数阻塞参数。我期待看到日志文件。否则如果你有一个 github-repo 会重现这个问题，我会看看。
标签： ruby-on-rails ruby ruby-on-rails-5 cocoon-gem