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如果你刚好需要在Rails项目中集成一款编辑器，那么我推荐你使用Simditor。轻量级且易用，花个几分钟看一下吧。
//= require jquery
//= require module
//= require hotkeys
//= require uploader
//= require simditor
= require simditor
Git@OSC下载必要的文件
.ui.form
= form_for @post do |f|
.field
= f.text_field :title,:label=>false,:id=>‘post_title‘,:placeholder=>‘请输入标题‘,:class=>‘ui transparent input‘
.field
= f.text_area :content,:label=>false
.field
= f.button :submit,:class=>‘ui fluid button‘
:javascript
var editor = new Simditor({
textarea: $(‘#post_content‘),
placeholder: ‘请输入正文‘,
defaultImage: ‘/image.png‘,
fileKey: ‘upload_file‘,
upload: {
url: ‘/upload‘,
leaveConfirm: ‘正在上传文件，如果离开上传会自动取消‘
},
pasteImage: true
});
在js中
filekey保存上传文件的一些属性（这里的上传文件为图片）
upload属性需要注意的是url: ‘/upload‘这里指明。
根据upload的url:‘/upload‘我们可以写出对应的request处理路由
post ‘upload‘ => ‘upload#image‘
到这里前端的任务差不多完成了，最后我们来看一下后端的一些罗辑代码。
class UploadController < ApplicationController
def image
file = params[:upload_file]
file_list = []
success = true
msg = ‘上传成功‘
file_real_path = ‘‘
if !file.content_type.match(/^image\/(gif|png||jpg||jpeg|){1}$/)
success = false
msg = "#{file.original_filename}:只支持上传JPG,JPEG,PNG格式图片"
elsif file.size > 2*1024*1024
success = false
msg = "#{file.original_filename}:图片太大，请上传小于2M的图片"
end
if success
file_real_path = save_file(file)
file_list << file_real_path
end
logger.info file_real_path
render json: {:success=>success, :msg=>msg,:file_path=>"/#{file_real_path}" }
end
private
def save_file(file)
extname = file.content_type.match(/^image\/(gif|png|jpg|jpeg){1}$/).to_a[1]
filename = File.basename(file.original_filename,‘.*‘)
uri = File.join(‘uploads‘,‘images‘,"#{DateTime.now.strftime(‘%Y/%m%d/%H%M%S‘)}_#{SecureRandom.hex(4)}_#{current_user.id}.#{extname}")
save_path = Rails.root.join(‘public‘,uri)
file_dir = File.dirname(save_path)
FileUtils.mkdir_p(file_dir) unless Dir.exists?(file_dir)
File.open save_path, ‘wb‘ do |f|
f.write(file.read)
end
return uri
end
end
这里需要注意的是后端处理之后应返回json，这里是：
render json: {:success=>success, :msg=>msg,:file_path=>"/#{file_real_path}" }
必须要返回插入图片的路径以便在前端页面显示。
提交之后，我们来看一下请求，在下面的日志中，可以仔细看一下上传图片的处理过程。
Started POST "/upload" for 127.0.0.1 at 2015-05-02 03:39:59 +0800
Processing by UploadController#image as */*
Parameters: {"upload_file"=>#<ActionDispatch::Http::UploadedFile:0xba34087c @tempfile=#<Tempfile:/tmp/RackMultipart20150502-7561-lbplib.png>, @original_filename="Fruit-2.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"upload_file\"; filename=\"Fruit-2.png\"\r\nContent-Type: image/png\r\n">, "original_filename"=>"Fruit-2.png"}
User Load (0.2ms) SELECT `users`.* FROM `users` WHERE `users`.`id` = 12 LIMIT 1
uploads/images/2015/0502/033959_a79e85fa_12.png
Completed 200 OK in 28ms (Views: 1.0ms | ActiveRecord: 0.2ms)
Started POST "/posts" for 127.0.0.1 at 2015-05-02 03:42:00 +0800
Processing by PostsController#create as HTML
Parameters: {"utf8"=>"?", "authenticity_token"=>"dSggdOLs6OvBjtSL9KxuodHnrGmBoX8oWB7FCwuyDFaNGJkDCBl6t8wF2JLe3FT/SWqSHH2pEH1//0Ho0o+/uA==", "post"=>{"title"=>"这是标题", "content"=>"<p><b>粗体 </b> <i>斜体</i> <u>下划线</u> <strike>删除线文字</strike></p><ol><li>有序列表</li><li>有序列表</li></ol><ul><li>无序列表</li><li>无序列表</li></ul><p><img alt=\"Fruit-2.png\" src=\"/uploads/images/2015/0502/033959_a79e85fa_12.png\" data-image-size=\"80,80\"><br></p>"}, "button"=>""}
(0.1ms) BEGIN
SQL (0.2ms) INSERT INTO `posts` (`tags`, `title`, `content`, `created_at`, `updated_at`) VALUES (NULL, ‘这是标题‘, ‘<p><b>粗体 </b> <i>斜体</i> <u>下划线</u> <strike>删除线文字</strike></p><ol><li>有序列表</li><li>有序列表</li></ol><ul><li>无序列表</li><li>无序列表</li></ul><p><img alt=\"Fruit-2.png\" src=\"/uploads/images/2015/0502/033959_a79e85fa_12.png\" data-image-size=\"80,80\"><br></p>‘, ‘2015-05-01 19:42:00.407888‘, ‘2015-05-01 19:42:00.407888‘)
(101.7ms) COMMIT
Redirected to http://huxi.com/
Completed 302 Found in 107ms (ActiveRecord: 102.1ms)
最后看看Post存储在数据库中的内容
irb(main):008:0> Post.first Post Load (0.3ms) SELECT `posts`.* FROM `posts` ORDER BY `posts`.`id` ASC LIMIT 1 => #<Post id: 4, title: "这是标题", content: "<p><b>粗体 </b> <i>斜体</i> <u>下划线</u> &nb...", visited_count: nil, tags: [], created_at: "2015-05-01 19:42:00", updated_at: "2015-05-01 19:42:00"> irb(main):009:0> Post.first.content Post Load (0.1ms) SELECT `posts`.* FROM `posts` ORDER BY `posts`.`id` ASC LIMIT 1 => "<p><b>粗体 </b> <i>斜体</i> <u>下划线</u> <strike>删除线文字</strike></p><ol><li>有序列表</li><li>有序列表</li></ol><ul><li>无序列表</li><li>无序列表</li></ul><p><img alt=\"Fruit-2.png\" src=\"/uploads/images/2015/0502/033959_a79e85fa_12.png\" data-image-size=\"80,80\"><br></p>" irb(main):010:0>
Over.
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原文地址：http://my.oschina.net/huangwenwei/blog/408998
