在数据库中显示'nil'的嵌套属性
问题描述:
一直困住这一段时间,我正在使用向导gem并希望以嵌套形式保存租户属性。属性正在保存,但在数据库中输出nil。似乎不明白为什么不确定它的宝石,或者我缺少在模型或控制器中显而易见的东西。在数据库中显示'nil'的嵌套属性
参数
Parameters: {"utf8"=>"✓", "authenticity_token"=>"xPqiDsUpnuLHCSnU+XuAUce4b/cTnM/gv6T7wxdIz4g=", "property"=>{"tenants_attributes"=>{"0"=>{"title"=>"Mr", "firstname"=>"Foo", "surname"=>"bar", "dateofbirth(1i)"=>"2013", "dateofbirth(2i)"=>"7", "dateofbirth(3i)"=>"21", "telno"=>"01143268375", "contact_type"=>"foo", "email"=>"[email protected]"}}}, "commit"=>"Create Tenant", "property_id"=>"58"}
这里是零展示租户日志属性。
INSERT INTO "tenants" ("contact_type", "created_at", "dateofbirth", "email", "firstname", "property_id", "surname", "telno", "title", "updated_at") VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?) [["contact_type", nil], ["created_at", Sun, 21 Jul 2013 10:53:00 UTC +00:00], ["dateofbirth", nil], ["email", nil], ["firstname", nil], ["property_id", nil], ["surname", nil], ["telno", nil], ["title", nil], ["updated_at", Sun, 21 Jul 2013 10:53:00 UTC +00:00]]
属性/建立控制器
class Properties::BuildController < ApplicationController
include Wicked::Wizard
steps :tenant
def show
@property = Property.find(params[:property_id])
@tenant = @property.tenants.new
render_wizard
end
def update
@property = Property.find(params[:property_id])
@tenants = Tenant.find(params[:tenant])
case step
when :tenant
if @tenants.update_attributes(params[:tenants])
render_wizard @tenant
else
render :action => 'edit'
end
end
end
def create
@tenant = Tenant.create
if @tenant.save
flash[:success] = "Tenant Added"
redirect_to wizard_path(steps.first, :tenant_id => @tenant.id)
else
render 'edit'
end
end
端
属性模型
class Property < ActiveRecord::Base
attr_accessible :name, :address_attributes, :tenants_attributes
belongs_to :user
has_one :address, :as => :addressable
accepts_nested_attributes_for :address
validates_associated :address
has_many :tenants
accepts_nested_attributes_for :tenants
validates :name, presence: true, length: { maximum: 200 }
validates :address, presence: true
validates :user_id, presence: true
end
租户形式
<h2> Tenant Form</h2>
<%= simple_form_for @property, :url => url_for(:action => 'create', :controller => 'properties/build'), :method => 'post' do |f| %>
<%= f.simple_fields_for :tenants do |f| %>
<%= f.input :title %>
<%= f.input :firstname %>
<%= f.input :surname %>
<%= f.input :dateofbirth %>
<%= f.input :telno %>
<%= f.input :contact_type %>
<%= f.input :email %>
<%= f.submit %>
<% end %>
答
您在视图中有几个错误。首先,你错过了一个结束语句。其次,你使用f作为外部和内部形式,所以你用内部重写外部。尝试是这样的:
<%= simple_form_for @property, :url => url_for(:action => 'create', :controller => 'properties/build'), :method => 'post' do |f| %>
# Fields for property (f.input...)
<%= f.simple_fields_for :tenants do |tenant| %>
# Fields For tenant (tenant.input...)
<% end %>
<% end %>
另外,我觉得你这里有一个错误
@tenant = Tenant.create
if @tenant.save
flash[:success] = "Tenant Added"
redirect_to wizard_path(steps.first, :tenant_id => @tenant.id)
else
render 'edit'
end
使用if something.save
,你必须之前使用something.new
代替something.create
(create
创造了新的记录,并保存到数据库,不需要再次保存,new
只是创建记录,但必须手动保存)。
你可能需要像
@property = Property.new(params[:property])
if @property.save
flash[:success] = "Tenant Added"
redirect_to wizard_path(steps.first, :tenant_id => @tenant.id)
else
render 'edit'
end
谢谢你的提示做出那些改变。 – cyclopse87
现在有效吗? –
不幸的是,仍然没有相同的问题。 – cyclopse87