Generate Gui for random string in Ruby On rails

def random_string(h=4)
           chars = (Digest::MD5.hexdigest "#{DateTime.now.to_s}")
            code = ''
            length.times { code << chars[rand(chars.size)] }
            code.upcase
end

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Error malloc(): memory corruption nginx with passenger?

Error malloc(): memory corruption nginx with passenger Passenger issue resolving steps : sudo gem uninstall passenger(uninstall all passenger) sudo gem install passenger sudo passenger-install-nginx-module --auto --auto-download --prefix=/opt/nginx --extra-configure-flags=none Update nginx config file with new passenger version and restart the nginx

WKHTML pdf setup in Ubuntu

wkhtml to pdf install on ubuntu 20.04 sudo apt-get install -y libxrender1 libfontconfig1 libx11-dev libjpeg62 libxtst6 fontconfig xfonts-75dpi xfonts-base libpng12-0 wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.xenial_amd64.deb #issue fix for: libpng12-0 sudo add-apt-repository ppa:linuxuprising/libpng12 sudo apt update sudo apt install libpng12-0 #Issue fix for: libssl1.0.0. Edit the source list sudo nano /etc/apt/sources.list to add the following line: deb http://security.ubuntu.com/ubuntu xenial-security main Then sudo apt update and sudo apt install libssl1.0.0. #source link: https://askubuntu.com/questions/1261614/ubuntu-20-04-libssl-so-1-0-0-cannot-open-shared-object-file-no-such-file-or-d sudo dpkg -i wkhtmltox_0.12.5-1.xenial_amd64.deb sudo apt-get -f install

Rails Migration Difference between Text and String

Rails Migration Difference between Text and String ? While working with Rails Migration Difference between Text and String is important to be known to every developer. Columns and their data types are finalized while deciding Table structure. This tutorial will help understand difference between String and Text column type and illustrate how to write Rails Migration implementing the same. You might want to read about database.yml files for specifying database configuration for Rails Application. 1. Concepts When String or Text data type is required? Whenever you require your column to store information which is lengthy in size (Many characters), you need to consider String or Text data type for the column. Both of them let you store Many(How Many - will see later) characters Difference between String and Text Considering MySQL database Feature String Text Length 1 to 255 ...

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