Installation
Install graphviz (if not yet)
window http://www.graphviz.org/Download_windows.php
linux sudo apt-get install graphviz
osx brew install graphviz
Add the gem
In the project gemfile add
group :development do
gem 'rails-erd'
end
bundle exec rake erd and it will generate a PDF file in the root of the app.
I wanted to post a quick guide to the special ruby syntax for literals that utilize the % (percent) symbol. Most beginners guides to ruby leave out an explanation of these forms of literals, but many ruby coders use them. When someone encounters them for the first time it is almost impossible to figure out what they mean. (Try searching Google for “%w”)
Ruby has special syntax for making strings, arrays and system commands easier to write. They allow you to use different characters as delimiters so you can minimize escaping in your literals.
The syntax
The syntax for the % literals is a percent symbol (%) a letter which defines what kind of literal it is (Q, q, w, x, r) a delimiter, the content, and the closing delimiter.
The delimiter can be any character, and is defined as whatever is immediately after the letter in the syntax. For example %Q!content! , the delimiter is the ! and it surrounds the content. There are special cases when the delimiter is { or (, the closing delimiter will be } or ) respectively.
%Q and %q (Percent Q): Strings
%Q!Some String of “Characters”! <==> ” Some String of \”Characters\” “
%Q is the equivalent to a double-quoted ruby string. #{expression} evaluation works just like in double-quoted strings, even if you use %Q{} as your delimiter!
You can also leave off the Q and it will have the same functionality. I recommend leaving the Q in to be more clear.
%q!Some String of “Characters”! <==> ‘Some String of Characters’
The %q is just like %Q, but acts the same as a single-quoted string. Whatever is inside the delimiters is returned as a string.
You can remember %Q is for strings because it acts like Quotes.
More info here: http://docs.huihoo.com/ruby/ruby-man-1.4/syntax.html#string
%W (Percent W): Arrays
%W(North South East West) <==> ["North", "South", "East", "West"]
%W (and %w) allow you to create an Array of strings without using quotes and commas.
The delimiter rules are the same as strings, but typically parentheses are used. The content inside the delimiters are split by white-space, and put into an array. This is great if you have a hard coded list of single word strings.
When using %W (capital W), it is evaluated as a double-quoted string. This allows you to use #{} to interpolate values. %w (lower-case w) will evaluate as a single quoted string.
You can remember %W is by thinking of it as a White-space divided Array.
More info here : http://docs.huihoo.com/ruby/ruby-man-1.4/syntax.html#array
%x (Percent x): System Execution
%x{ ls /usr/local } <==> `ls /usr/local`
%x allows you to call system commands, equivilent to wrapping the command in `s (grave accents). The benefit of the $x{} syntax is you don’t have to escape your accents in commands that use them.
You can remember to use X because it eXecutes a command.
More info here: http://docs.huihoo.com/ruby/ruby-man-1.4/syntax.html#command
%r (Percent r): Regular Expressions
%r{/usr/bin/} <==> /\/usr\/bin\//
%r is really handy for regular expressions that contain /s (forward slashes) which are the default delimiter for regular expressions and have to be escaped.
Remember to use %r with regular expressions.
More info here: http://docs.huihoo.com/ruby/ruby-man-1.4/syntax.html#regexp
I hope this information is helpful. Please leave a comment if this helped or if I left something out.
Tags: Percent Functions, Percent Literals, Ruby, Syntax
credit : http://jimhoskins.com/2008/10/07/ruby-percent-syntax-percent-functions/
ระหว่างทำ gallery เจอ error message ว่า
has an extension that does not match its contents
แต่... บน ubuntu ไม่เป็น งงเบย เป็นเฉพาะ windows
สร้างไฟล์ config/initializers/paperclips.rb
require 'paperclip/media_type_spoof_detector'
module Paperclip
class MediaTypeSpoofDetector
def spoofed?
false
end
end
end
ยังไม่จบ แก้ไฟล์ config/enviroments/development.rb (สำหรับ run แบบ development)
...
Paperclip.options[:command_path] = "C:/Program Files/ImageMagick-6.8.9-Q16/"
...
เพิ่มบรรทัดด้านล่าง config/environments/development.rb
Paperclip.options[:command_path] = "C:/Program Files/ImageMagick-6.8.9-Q16/"
config/initializers/paperclip.rbrequire 'paperclip/media_type_spoof_detector'
module Paperclip
class MediaTypeSpoofDetector
def spoofed?
false
end
end
end
ไม่มีอะไรมาก ใช้มุก replace
<script>
jQuery(function($) {
$('#article_body_editor').on('keyup keypress blur change', function() {
article_body_editor = $('#article_body_editor').html()
.replace(/\[prettyprint\]/g, '<pre class="prettyprint">')
.replace(/\[prettyprint linenums\]/g, '<pre class="prettyprint linenums">')
.replace(/\[\/prettyprint\]/g, '</pre>')
.replace(/\[code\]/g, '<code>')
.replace(/\[\/code\]/g, '</code>');
$('#article_body').val(article_body_editor);
});
});
</script>
gem mysql2 ไม่ support mysql 64 bits ???
ลง mysql connector 32 bits
http://dev.mysql.com/downloads/connector/c/
gem install mysql2 -- '--with-mysql-lib="C:\Program Files (x86)\MySQL\MySQL Connector C 6.1\lib" --with-mysql-include="C:\Program Files (x86)\MySQL\MySQL Connector C 6.1\include"
libmysql.dll จาก C:\Program Files (x86)\MySQL\MySQL Connector C 6.1\lib ไปไว้ที่ C:\Ruby193\bin นะจ๊ะ--- for mySQL installation ---
If you dont already have these two files installed you might need them to get your MySQL going
vcredist_x86.exe -> http://www.microsoft.com/download/en/details.aspx?id=5555 dotNetFx40_Full_x86_x64.exe -> http://www.microsoft.com/download/en/details.aspx?id=17718
Use default install Developer Machine
-MySQL Server Config-
port: 3306
windows service name: MySQL55
mysql root pass: root (you can change this later)
(username: root)
-MySQL Server Config-
--- for mySQL installation ---
--- Install the mysql2 Gem ---
Important: Do this with Git Bash Command Line(this was installed with railsinstaller) -> start/Git Bash
gem install mysql2 -- '--with-mysql-lib="c:\Program Files\MySQL\MySQL Server 5.5\lib" --with-mysql-include="c:\Program Files\MySQL\MySQL Server 5.5\include"'
Now the gem should have installed correctly
Lastly copy the libmysql.dll file from
C:\Program Files\MySQL\MySQL Server 5.5\lib
to
C:\Rails\Ruby1.9.2\bin
--- Install the mysql2 Gem ---
แก้ config/initializers/devise.rb
...
config.sign_out_via = :delete
...
require jquery_ujsconfig/initializers/devise.rb
...
config.sign_out_via = :get
...
require jquery_ujs จะใช้ data-method ที่ link_to ไม่ได้
มีโทรศัพท์แจ้งมาว่า "แบท พี่เปลี่ยนวิธี connect mysql ให้ต้อง ssh tunnel นะ"
ตึ่งโป๊ะ!!! ทำไงๆๆๆ คืออะไร แค่เคยเห็นผ่านๆ แล้ว Ruby on Rails ทำไง
อันดับแรกssh -N -L 8888:127.0.0.1:3306 -f remote-user@remote-domain-or-ip
ใน database.yml ก็
production:
adapter: mysql2
encoding: utf8
host: 127.0.0.1
port: 8888
database: databasename
username: remote-user
password: password-remote-user
โอ้ววว เมลไม่ออก ตั้งแต่วันอังคารNet::SMTPFatalError: 553 5.1.2 The address specified is not a valid RFC-5321 address. - gsmtp
จากเดิมใน xxx_mailer.rbmail(from: "ibatt.in.th@gmail.com", to: "to@email.com", subject: 'สวัสดีมนุษย์')
แก้เป็นmail(from: "I'm BATT <ibatt.in.th@gmail.com>", to: "to@email.com", subject: 'สวัสดีมนุษย์')
อยากใช้ font ไทย ใน prawn แล้วอยากใช้ inline format ด้วยprawn คืออะไร plugin ruby เอาไว้เขียน pdfinline format คืออะไร ก็แบบ ใส่ <b></b> แล้วได้ตัวหน้า ใส่ <i></i> ได้ตัวเอียง
ก็เพิ่ม font family สิครับ
pdf = Prawn::Document.new :page_size => 'A4', :margin => [margin_top, margin_right, margin_bottom, margin_left]
pdf.font_families.update("THSarabun" => {
:normal => File.join("public", "fonts", "THSarabun.ttf"),
:italic => File.join("public", "fonts", "THSarabunItalic.ttf"),
:bold => File.join("public", "fonts", "THSarabunBold.ttf"),
:bold_italic => File.join("public", "fonts", "THSarabunBoldItalic.ttf")
})
pdf.font "THSarabun", size: 14
pdf.text "แบบฟอร์ม", align: :center
pdf.text "<b>1. ชื่อโครงการ</b> #{@project.name}", inline_format: true
pdf.text "#{@project.code}"
nvm ls available //windows
nvm ls-remote //MacOs/Linux
