数据库中的Rails视图记录 _视图

我们将看到一个示例, 用于查看应用程序中的数据。
步骤1创建一个新的Rails应用程序。

rails new viewrecord

【数据库中的Rails视图记录】步骤2更改目录以保存。

cd viewrecord

步骤3从控制台创建控制器。

rails g controller products index show new create destroy

步骤4从控制台创建模型。

rails g model product name:string price:decimal short_description:text full_description:text

步骤5转到app / controllers / products_controller.rb并编写以下代码。

class ProductsController < ApplicationController # GET method to get all products from database def index @products = Product.all end # GET method to get a product by id def show @product = Product.find(params[:id]) end # GET method for the new product form def new @product = Product.new end # POST method for processing form data def create @product = Product.new(product_params) if @product.save flash[:notice] = 'Product added!' redirect_to root_path else flash[:error] = 'Failed to edit product!' render :new end end def destroy @product = Product.find(params[:id]) if @product.delete flash[:notice] = 'Product deleted!' redirect_to root_path else flash[:error] = 'Failed to delete this product!' render :destroy end end def product_params params.require(:product).permit(:name, :price, :old_price, :short_description, :full_description) end end

步骤6运行以下命令：

bundle install

步骤7转到app / views / products / index.html.erb文件。

< h3> STOCK LIST< /h3> < div> < %= link_to 'Add Product', new_product_path %> < /div> < br> < table class="table table-bordered table-striped"> < tr> < th> Name< /th> < th> Price< /th> < th> Description< /th> < /tr> < % @products.each do |product| %> < tr> < td> < %= product.name %> < /td> < td> < %= product.price %> < /td> < td> < %= truncate(product.short_description, :length => 75) %> < /td> < td> < %= link_to 'Delete', product_path(product), method: :delete %> < /td> < /tr> < % end %> < /table>

步骤8转到app / views / products / new.html.erb文件。

< %= form_for @product, url: {action: :create} do |f| %> < h3> Add a Product< /h3> < div class="field"> < %= f.label :name %> < %= f.text_field :name %> < /div> < div class="field"> < %= f.label :price %> < %= f.text_field :price %> < /div> < div class="field"> < %= f.label :short_description %> < %= f.text_field :short_description %> < /div> < /p> < /div> < div class="actions"> < %= link_to 'Back', { controller: 'products', action: 'index'} %> < %= f.submit 'Create Product' %> < /div> < % end %> < /div>

步骤9启动服务器。