How to upload large file to S3 using multipart upload and rubygem 'aws-sdk'
Hello Guys, After a long time I am back with the solution of large file uploads hassle on s3. Many times we face problem in uploading large files to S3. Whe...
Recent Posts
How to create sidekiq worker with custom queue
Hello Friends, I am back with new real programming problem. In general practice when we are working with sidekiq and delayed jobs. The problem occurs when we...
How to Wrap hash into nested hash without any root element
Hello Friends, Generally we request a root element in request params, from a rest api. Suppose if you have a REST api for create user with name then you hav...
How to solve error: Unquoted fields do not allow or from csv file
Hello Friends, We often use csv upload feature in our rails applications. If you have converted a xls or xlsx file to csv, it might be possible that csv file...
How to solve error: file '/grub/i386-pc/normal.mod' not found ubuntu
Hello Friends, We often need to upgrade our ubuntu OS, to get updated and use latest Ubuntu. We might be facing a common problem that the system will be una...
Is it possible to have multiple store attributes in a single model
Yes. We can have multiple store attributes in a single table. Here is an example:
How to update an attribute of record without updating updated_at attribute
Hello There, We often need to update the records without make any changes in updated_at column. There are many ways to update a record my rails. You can use...
How to write A base64 encoded image with mimetype in Rails
Hello There, We often need to convert a base64 encoded image to actual image file. It generally happens When we work with apis. Here is an example how can we...
How to pass parameters in rails callback
Hello There, Today I will discuss how to pass parameters in active record callback methods:
How to scrape websites with Ruby & Mechanize
Hello There, Today I will discuss how to scrape a website using gem mechanize. Here is an example:
Fix/Install graphics drivers in ubuntu 16.10
After upgrading to ubuntu 16.10, I face a problem with graphics drivers. When I connect extended display to the system it start flickering. It’s due to the ...
How To Secure Nginx with Let's Encrypt on ubuntu
Hello All, Today I am gona discuss how to secure you website with free ssl provided by Let's Encrypt with nginx web server on an ubuntu machine.Here are som...
How to solve error 'UNEXPECTED-INCONSISTENCY;-RUN-fsck-MANUALLY'
Recently I faced a problem while rebooting my ubuntu i.e UNEXPECTED-INCONSISTENCY;-RUN-fsck-MANUALLY shows on screen.This problem occurred when file system ...
How to solve error 'root /usr/bin/sudo must be owned by uid 0' in ubuntu
In general life we often face the problem when system gives error root /usr/bin/sudo must be owned by uid 0, while trying to run command as sudo in ubuntu. I...
Bidirectional Destroys in Rails 5
Suppose you have two models having has_many/belongs_to associations between them, In previous versions of rails you cannot add dependent: :destroy to both o...
Has secure token in rails 5
Today I gona discuss about the ActiveRecord::Base#has_secure_password method, in rails 5 it became has_secure_token, it specifies that an attribute of your m...
How to store an object in active record rails
How ever in practice we have to store an object like Hash or Array into the database, like you want a hash to be store in the database and keys of the that h...
How to add custom error pages in rails
How ever in practice we often have add custom error pages in rails application. Suppose we need to do some manipulation in the error pages like serve error p...
How to remove a sub url from request url with nginx config
How ever in practice we often have to remove or redirect a request url to some sub-url of that request url. To solve this we can just make some changes in th...
7 reasons to choose ruby rails for as programming language
One of the hottest technical trends of 2015, Ruby On Rails development is rapidly gaining popularity as an ideal solution for creating web applications. It i...
How to generate a new ssl and configure it with nginx
Hello There, In genral web developemnt, We often need to run our web applications on https in place of http for making our applications more secure. Here is ...
How to run multiple rails applications on different sub urls with same domain
Hello There, Today I am going to tell you how you can run multiple rails applications on a single server with different sub urls. I am using ````nginx +passe...
How to upgrade nginx to updated version
Hello There, Today I am going to tell you how to update the nginx to latest stable version without removing it.
How to create tooltip using scss
Hello There, Today I am going to show how to create tooltip using scss. It’s very easy to create tooltip without using javascript.
Hosting jekyll blog site on aws and post by git push.
Hello There, Hope you are goind great. Today I am gona discuss how to host a jekyll’s blog website on aws and write an new blog post by simply using the git ...
Searching with sunspot solr.
Sunspot is a Ruby library for expressive, powerful interaction with the Solr search engine. Sunspot is built on top of the RSolr library, which provides a lo...
How to remove a text from file/files using grep
However in practice we need to remove some text from a file or from multiple files. Removing text from files manually is a tough task. Here is a sample exam...
Advanced rails model generators
There are some people who give advice to not use rails generators and create models, controllers and etc. things manually. I don’t agree with them and my adv...
Find duplicate records and delete mysql
However in practice we need to see that there are some records in our database they have duplicate values. This problem can be resolve by using the uniqness ...
Fixing dell inspiron unresponsive touchpad
I face a problem in laptop touchpad not responding while upgrading ubuntu 14.04 to 14.10 or newer versions. Touchpad was working fine in ubuntu 14.04 but whe...
Working with elastic search ubuntu
Elasticsearch is an open-source, broadly-distributable, readily-scalable, enterprise-grade search engine. Accessible through an extensive and elaborate API, ...
Fixing fetch google chrome apt error 'stable InRelease' doesn`t support architecture 'i386' on ubuntu
Recently I got an error while running the command sudo apt-get update. The error was Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Relea...
Send push based notification on ios devices from rails application
How ever in practice we need to send push based notifications on ios devices from the rails application.
Create thumbnail of a video by using ffmpeg
How ever in practice we often need to create thumbnails of the video. I am using the linux library to create the thumbnail of a video. Here is the example of...
Working with CSV in jquery Papa parse
Papa Parse is a powerful CSV (delimited text) parser that gracefully handles large files.you can easily use this and can parse large csv files efficiently.yo...
Adding a new user into aws machine and ssh without pem.
Hello all, However in practice we always need to create a new user into aws servers and perform several operations. Like ssh. ssh is a basic operation that w...
Set up CloudFlare's free SSL on Heroku
On September 29, 2014, CloudFlare introduced Universal SSL for the public. To be able to offer TLS certificates for free, they are using the extension to TLS...
Batched queries in rails
However in practice we need to perform certain task on each record and there are lots of records in the table. For this purpose we use batched queries in ra...
GPG error: http://deb.opera.com stable InRelease: The following signatures couldn't be verified
However in practice we got an error GPG error: http://deb.opera.com stable InRelease: The following signatures couldn't be verified because the public key is...
Difference between Legacy and UEFI boot
Hello Friends, Today I am going to discuss about the difference between Legacy and UEFi boot. ###What is legacy boot: Legacy Boot is the boot process used b...
Fix rmagick issue in mac os
Hello Friends, However in practice you need to use rmagick in mac os. If you are facing any problem with rmagick then you just need to follow these steps:
Select-2 with active admin in rails
Hello There!!, In the previous blog we lean how to deploy a rails application with passenger and nginx. Today we are going to learn how to deploy a rails app...
How to deploy rails app with passenger and nginx with SSL
Hello There!!, In the previous blog we lean how to deploy a rails application with passenger and nginx. Today we are going to learn how to deploy a rails app...
How to deploy rails app with passenger and nginx
Hello There!!, Today we are going to learn about how to deploy a rails application with passenger and nginx.
How to take database dump with cron and delete old backups
Hello friends, I am back with the new problem i.e how to take automatic database dump and delete old ones.
How To create a new user and grant permissions in MySQL and allow to access database remotely
Hello friends, I am back with the new problem i.e ‘how to allow remote mysql database connection to a user?’
How to check a mobile number for DND activation
Hello, Today I am telling something that is very useful to us. It is may or may not be related to our work but it’s very important. Now I am describing how t...
General settings for deployment in deploy.rb Capistrano
Here some general settings and use of them in capistrano deployment.
How to show a static page during server maintenance by nginx ?
Hello there! I am back again with the new blog post.All of us mush have faced the application maintenance downtime over the production environment. Rather th...
How access controller method in models
How ever in practice some time we require to access the controller’s methods in the models.It’s quite easy to do so in rails. Here is an explanation of that: