Question

我正在开发一个rails应用程序。我有一个新帖子的表单，其中包括标题，图片，URL链接和说明。但是，我遇到了一个问题，即每当用户尝试更新（编辑）帖子时，URL链接就会消失。用户每次必须更新帖子时都必须重写URL链接！

这是我的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

这是我的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

我找不到与我的问题类似的东西，请帮忙！感谢

Answer 1

通过使用：value，您将覆盖将放置在那里的字段的值。您可以使用：占位符代替。

更改此行

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

使用占位符而不是像这样的值

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

如何在表单中编辑帖子后保存网址

1 个答案: