Question

我的控制器：

class ArticlesController < ApplicationController

    def index
        @articles = Article.organise
    end

    def show
        @article = Article.find(params[:id])
    end

    def edit
        @article = Article.find(params[:id])
    end

    def update
        @article = Article.find(params[:id])
        @article.update(article_params)
        redirect_to @article
    end

    def new
        @article = Article.new
    end

    def create
        @article = Article.new(article_params)
        @article.save
        redirect_to @article
    end

    def destroy
        @article = Article.find(params[:id])
        @article.destroy
        redirect_to articles_path
    end


    private

    def article_params
        params.require(:article).permit(:title, :brief, :posted_by, :posted_at, :posted_from, :image_file_name)
    end



end

我的观点：

  <p>
      <%= f.label :Image %><br/>
      <%= f.file_field :image_file_name %>
  </p>

我的模特：

class Article < ActiveRecord::Base

    def self.organise
        order("posted_at desc")
    end



end

我在控制器中的参数：

def article_params
  params.require(:article).permit(:title, :brief, :posted_by, :posted_at, :posted_from, :image_file_name)
end

返回此错误，我认为它与控制器参数有关，但我不太确定。

ActiveRecord::StatementInvalid in ArticlesController#create
 TypeError: can't cast ActionDispatch::Http::UploadedFile to string: INSERT INTO "articles" ("brief", "created_at", "image_file_name", "posted_at", "posted_by", "posted_from", "title", "updated_at") VALUES (?, ?, ?, ?, ?, ?, ?, ?)

Answer 1

我相信你没有使用任何宝石进行文件上传。

<%= form_for @article, {},:html => {:multipart => true } do |f| %>
 <p>
  <%= f.label :Image %><br/>
  <%= f.file_field 'file' %>
  <%= f.submit "Upload" %>
 </p>
<% end %>

在您的创建操作中添加此内容并上传到相同的服务器位置/资产/图像

if params[:article].present?
 file = params[:article][:file]
 File.open(Rails.root.join('app','assets', 'images', file.original_filename), 'wb') do |f|
  f.write(file.read)
 end
end

Rails file_field没有上传图片

1 个答案: