So you have build a Flask application and now you want to server the application in the web. In this tutorial, I’m going to teach how you can do that with Nginx on an Ubuntu platform.
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Category: Programming
Thoughts about programming from my experience and learning.
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Updating Rails app gems
Past few weeks, we have been focusing on updating Gems of our Rails application.
This article about my recent work I have done in creating a JavaScript based HTML form validation library.
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Debugging CkEditor for tests
This week has been an interesting week as it was mostly debugging and fixing tests.
In this article, I’m going to teach how I manage to integrate Philips Hue bridge with Google Assistant SDK to control my smart lights.
Last week has been a firefighting week at work (i.e. debugging and troubleshooting). I’m writing this article to share my experience with debugging a system configuration at work. In the end of article, I have placed some lessons learned points so hopefully someone can learn from it to improve their career.
Selenium WebDriver providesActionBuilder to perform complex user interactions with a web page. It allows chaining multiple actions together to perform a complex action.
You can create a complex action and execute the action (perform) it in the following manner. (Ruby)
driver.action.key_down(:shift).
click(element).
click(second_element).
key_up(:shift).
drag_and_drop(element, third_element).
perform
The action to open the context menu is context_click() .
driver.action.context_click(webdriver_element).performBy default, it will click on the middle of the element if you provide one. Otherwise, it will click where the mouse pointer is at.
If you want to move the pointer to a specific location of the page before clicking, use methodmove_to.
If you want to select an item from the context menu use arrow keys and enter then perform the action. You can also further pinpoint the cursor position by using custom position from your element reference
page.driver.browser.action.move_to(webdriver_element, 5, 10)
.context_click
.send_key(:arrow_down)
.send_keys(:enter)
.perform
Ref: http://www.rubydoc.info/gems/selenium-webdriver/Selenium/WebDriver/ActionBuilder
At my current workplace, we use a copy of the backup database which is created by pg_dump to restore in our development machines. Since the database has a lot of audit tables which adds up a lot of space, I needed an easier way to ignore these tables when restoring the database.
Apparently pg_restore can generate a list of tables in the dump file archive. The advantage is that we can use the same list to specify what content we need to restore.
pg_restore options
Here are the pg_restore options we are going to use for this.
-l --list
List the contents of the archive. The output of this operation can be used as input to the -L option. Note that if filtering switches such as -n or -t are used with -l, they will restrict the items listed.
-L list-file --use-list=list-file
Restore only those archive elements that are listed in list-file, and restore them in the order they appear in the file. Note that if filtering switches such as -n or -t are used with -L, they will further restrict the items restored.
list-file is normally created by editing the output of a previous -l operation. Lines can be moved or removed, and can also be commented out by placing a semicolon (;) at the start of the line. See below for examples.
Steps
Let’s generate the list while ignoreing the content for the tables we don’t need. Note that I use an inverse grep statement to ignore the content of the tables where the table names that ending with _audits and create the output in restore.list file.
pg_restore -l <dump_file.data> | grep -v 'TABLE DATA public .*_audits' > restore.list
Then simply use -L to tell pg_restore to use the restore.list file.
pg_restore -U #{USERNAME} -O -L restore.list -v -c -d atlas_development PostgreSQL.sql
Ref
pg restore options: https://www.postgresql.org/docs/10/static/app-pgrestore.html
This article is about how you can configure to use the Ruby SDK in your Vagrant image with RubyMine.
For this, I have used the joshfng/railsbox Vagrant image because I was using that image for a Rails project.
First you have to find where is your Ruby interpreter located for your project. Let’s assume your project lies in the same folder where you have Vagrantfile. In this case, by default the /vagrant folder in the vagrant image will contain your code.
To find the ruby path, here type `which ruby`. Then it will spit out the location. You have to remember this location. In my it was ‘/home/vagrant/.rbenv/shims/ruby’.
Now, to link to the vagrant ruby interpreter, you have to open the preferences dialogue and then select Languages & Frameworks > Ruby SDK and Gems.
Then click on + and select remote location as the location and select vagrant.
For the Vagrant path, give the folder where your Vagrantfile is located. For the Ruby interpreter path, give the path you found before.
Click Ok.
Now Rubymine should load up the necessary gems to itself which will take some time. But after that, you should be good to go!