如何在編輯帖子後保存網址

Question

我正在使用Rails應用程序。我有一個新帖子的表格，包括標題，圖片，網址鏈接和描述。但是，我遇到了一個問題，那就是每當用戶嘗試更新（編輯）該帖子時，URL鏈接都會消失。用戶每次必須更新帖子時都必須重寫URL鏈接！

這裏是我的edit.html.haml：

.col-md-6.col-md-offset-3 
    .row 
     .panel.panel-default 
      .panel-heading 
       %h1 Edit Project 
      .panel-body 
       = simple_form_for @post, html: { multipart: true } do |f| 
        - if @post.errors.any? 
         #errors 
          %h2 
           = pluralize(@post.errors.count, "error") 
           prevented this Post from saving 
          %ul 
           - @post.errors.full_messages.each do |msg| 
            %li= msg 

        .form-group 
         = f.input :title,:label => "Project Name", input_html: { class: 'form-control', :type => "text", :required => ""} 

        .form-group 
         = f.input :image,:label => "Image", input_html: { class: 'form-group',"aria-describedby" => "fileHelp", :required => "", :type => "file" } 

        .form-group 
         = f.input :link,:label => "Project Link", input_html: { class: 'form-control', :type => "url", :value => "https://", :required => "" } 


        .form-group 
         = f.input :description,:label => "Description", input_html: { class: 'form-control', :rows => "3", :required => "" } 


        %button.btn.btn-info{:type => "submit" } Update Project 

這裏我posts_controller.rb：

class PostsController < ApplicationController 
    before_action :find_post, only: [:show, :edit, :update, :destroy, :upvote] 
    before_action :authenticate_user!, except: [:index, :show, :most_liked] 

    def index 
     @posts = Post.all.order("created_at DESC") 
    end 

    def most_liked 
     @most_liked = Post.all.order(cached_votes_score: :DESC) 
    end 

    def show 
     @comments = Comment.where(post_id: @post) 
     @random_post = Post.where.not(id: @post).order("RANDOM()").first 
    end 

    def new 
     @post = current_user.posts.build 
    end 

    def create 
     @post = current_user.posts.build(post_params) 


     respond_to do |format| 
      if @post.save 
       flash[:success] = 'YEs' 
       format.html { redirect_to @post } 
       format.json { render :show, status: :created, location: @post } 
      else 
       flash[:danger] = 'no' 
       format.html { render :new } 
       format.json { render json: @post.errors, status: :unprocessable_entity } 
      end 
     end 
    end 

    def edit 
    end 

    def update 
     respond_to do |format| 
      if @post.update(post_params) 
       flash[:success] = 'Good' 
       format.html { redirect_to @post } 
       format.json { render :show, status: :ok, location: @post } 
      else 
       flash[:danger] = 'bad' 
       format.html { render :edit } 
       format.json { render json: @post.errors, status: :unprocessable_entity } 
      end 
     end 
    end 

    def destroy 
     @post.destroy 
     redirect_to root_path 
    end 

    def upvote 
     @post.upvote_by current_user 
     redirect_to :back 
    end 

    private 

    def find_post 
     @post = Post.find(params[:id]) 
    end 

    def post_params 
     params.require(:post).permit(:title, :link, :description, :image) 
    end 

end 

我找不到類似我的問題的東西，請大家幫幫忙！謝謝

Answer 1

通過使用：值你覆蓋將放置在那裏的字段的值。你可以使用：placeholder。

改變這一行

= f.input :link,:label => "Project Link", input_html: { class: 'form-control', :type => "url", :value => "https://", :required => "" } 

使用的，而不是像這樣

= f.input :link,:label => "Project Link", input_html: { class: 'form-control', :type => "url", :placeholder => "https://", :required => "" }