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是否可以在一个控制器内将数据插入两个不同的表中

ruby-on-rails-5 ruby ruby-on-rails

gbenga wale · 技术社区 · 5 年前

用户表

和

图片表

它的主要工作是存储图片路径、名称和用户id(这样做是因为我想让我的应用程序的用户上传不止一张图片,如果我在users表中为图片创建一列,我将不允许我这样做)。

现在在表单(注册表单)中,如果用户决定上传图片,我希望图片保存在pictures表中,同时仍在

用户控制器创建方法

这就是我到目前为止所做的(新建.html.erb)

<% provide(:title, 'Sign up') %>
<h1>Sign up</h1>
<div class="row">
    <div class="col-md-6 col-md-offset-3">
        <%= form_for(@user, url: signup_path) do |f| %>
          <%= render'shared/error_messages', object: f.object %>
          <%= f.label :name %>
          <%= f.text_field :name, class: 'form-control' %>

          <%= f.label :email %>
          <%= f.email_field :email, class: 'form-control' %>

          <%= f.label :username %>
          <%= f.text_field :username, class: 'form-control' %>

          <%= f.label :password %>
          <%= f.password_field :password, class: 'form-control' %>

          <%= f.label :password_confirmation, "Confirmation" %>
          <%= f.password_field :password_confirmation, class: 'form-control' %>

          <span class="picture">
            <%= f.file_field :picture, accept: 'image/jpeg,image/gif,image/png' %>
          </span>
          <%= f.submit "Create an account", class: "btn btn-primary" %>
        <% end %>
    </div>
</div>

1. def create
2.  @user = User.new(user_params) # Not the final implementation!
3.
4.  if @user.save
5.      # Save to the picture name to the picture table
6.               if params[:picture].present?
7.                 # How do I save the picture to the picture table from users controller
8.            @user.send_activation_email
9.        flash[:info] = "Please check your email to activate your account."
10.       redirect_to root_url
11. else
12.     #@states = State.all
13.         render 'new'
14. end
15.  end

如果你看6号线和7号线,我有这些

if params[:picture].present?
  # How do I save the picture to the picture table from users controller

这就是现在的问题所在,如何将图片名称插入user-controller中的数据库

0 回复 | 直到 5 年前

SunTechnique 5 年前

# new action
def new 
  @user = User.new
  @user.pictures.build
end

# create action
def create
  @user = User.new(user_params)
  @user.save
end

private
def user_params
  params.require(:user).permit(:name, pictures_attributes: [:id]) 
# in addition to the id you need to specify the other required fields.
end

# User model
class User
  has_many :pictures
  accepts_nested_attributes_for :pictures, allow_destroy: true
end

# form view

<%= form_for @user do |f| %>
  pictures:
    <%= f.fields_for :pictures do |picture_form| %>
    # your code

我希望这能帮助你理解

Rishabh Aggarwal 5 年前

退房- https://github.com/ryanb/nested_form