Watch the presentation video on youtube:

My presentation on varnish cache. The goal of the presentation was:

• Thorough understanding of Varnish.
• Understanding of how VCL works and how to use it.
• Know how varnish works with Drupal and WordPress.
• Debug using varnish tools.

The post Presentation on Varnish Cache appeared first on Itty Bitty Talks.

You can give it a try.

Module Documentation Page: https://www.drupal.org/node/2239821

Git clone URL:

git clone git://git.drupal.org/sandbox/boyron/2239821.git

Download the module code

Read other Drupal tips I wrote here.

The post Drupal Ajax Contact Form appeared first on Itty Bitty Talks.

Now consider the following case:

• You have a topic (taxonomy term) page.
• Each topic has some sub-topics (taxonomy terms under topics)
• In the topic page, you have resource list which shows resources tagged with this topic. The list is made by a drupal view with topic set as contextual filter.
• Now the list need a sub topics filter. Sub topics under this topic, that the list belongs to, will only shows up using views exposed filter.

The complexity here is both topic and sub topic shares the same database id (field_topics_tid) and both are set in your views contextual filter and exposed filter.

So when user chooses a sub topics filter, views query will look like

WHERE field_data_field_topics.field_topics_tid = <topic_id_from_contextual_filter> AND field_data_field_topics.field_topics_tid = <topic_id_from_resource_filter>

As you see this will not generate a valid results.

We will need to do a logical OR using IN operator like

WHERE field_data_field_topics.field_topics_tid IN (<topic_id_from_contextual_filter>, <topic_id_from_resource_filter>)

Check this code from one of my projects to see how can we achieve this using views API.

Please let me know if you have any questions.

The post How to merge Drupal views filters appeared first on Itty Bitty Talks.

Now consider a situation, when you are doing the development alone in the team and you need to commit your codes, push them and build each time to see an output.

In this case, you can create a simple shell script that will

• take your commit message as argument and
• then commit your modified files (which are versioned already)
• then push your commit
• and do the build as well

Save the script as commit.push.build.sh run the script as

./commit.push.build.sh "commit message"

The post How to commit, push and trigger jenkins build at once from command line appeared first on Itty Bitty Talks.

Drupal views by default uses the logical AND operator for contextual filters in ‘WHERE’ clause in views query. This is true when you have:

• One contextual filter and one or more normal/exposed filters.
• More than one contextual filters.

If you want to apply OR instead of AND, you will need to implement two hooks.

• hook_views_query_alter() in file MY_MODULE.views.inc and
• hook_views_api() in MY_MODULE.module

Note the index ‘0’ in code `$query->where[0][‘type’] = ‘OR’;`. This indicates the first group of conditions in ‘where‘ clause which is for contextual filters.

I am sure you know, why MY_MODULE is written in caps everywhere. If you don’t, put a comment here and we will answer of course. (But, will see how to get the treat from you first )

The post How to force Drupal views contextual filter to use logical OR condition appeared first on Itty Bitty Talks.

also feel free to share yours in the comment below.

** I will be continuously updating this post. **

Drupal tips and tricks index

• An introduction to Drupal Context module.
• How to install DruSh in Windows.
• Change your Drupal site theme (default/admin) using DruSh.
• Upgrade Drupal core and contributed modules using a shell script.
• Apply logical OR condition for Drupal views contextual filter.
• Change admin password using DruSh.
• How to merge Drupal views filters
• Drupal Ajax Contact Form

Footnote: The pragmatic programmer book review. Every programmer should read this

The post Drupal tips and tricks appeared first on Itty Bitty Talks.

The post “A wet man does not fear the rain.” appeared first on Itty Bitty Talks.

The post “No matter how far down the wrong road you’ve gone, turn back.” appeared first on Itty Bitty Talks.

Pragmatic programmers automates everything

Yes! And why not build a script for your Jenkins build. Well, it’s not that hectic but still requires few steps:

• Open the browser.
• Write the Jenkins URL.
• Login.
• Find the job.
• Click build.

Won’t you feel happy, if the same operations work for only one step? Write the command and press enter! Boom!!

Lets see how to accomplish this.

We have discussed the solution here based on the OS.

OS X

If you are a Mac guy/girl, its pretty easy. Just write the following command:

Do not forget to replace the placeholder values.

• <your_jenkins_username> is your Jenkins username that you use to login to Jenkins.
• To get your <your_jenkins_API_key>:
  • Login to your Jenkins.
  • Click on the username in the top right.
  • Click on Configure.
  • Click on ‘Show API Token’ button.
  • You got it.

• <jenkins_server_url> is your respective Jenkins server URL (development or staging).
• <your_jenkins_job_name> is the job that you want to build.

Prepare the command by replacing the placeholders with proper values as described above and run it.

That’s it. This is how you can trigger jenkins build from command line

Isn’t it fabulous?

Do not forget to save the command somewhere. You can also create different batch files for different projects for even easier operation.

How to commit, push and trigger jenkins build at once from command line.

Linux

If you are a nix guy/girl but could not catch the Mac yet, don’t worry. You can just follow the instructions for OS X above. It will just work.

Alternatively, you can use ‘wget’ instead of ‘curl’ if you’re a wget fan.

And if you’re a ‘wget’ fan, you already know how to use ‘wget’. Hence, I am not repeating the instructions for ‘wget’.

It’s just replacing ‘curl’ with ‘wget’ and parameter are same.

Doesn’t work? Better use ‘curl’ lah…

Windows

That’s the 3^rd in my list. If you are actually a *nix guy/girl but somehow forced to use windows and helpless :|, Why don’t you use gitbash in windows and use *nix commands. That will just work.

If you do not understand, what I mean, (then probably you’re not a *nix person :P) ‘gitbash’ is a program combined of git and bash. A bash is shell that runs commands once you type the name of command and press enter.

For *nix fans in windows, good news is, gitbash accepts all basic *nix commands.

• Download  the git bash from here https://code.google.com/p/msysgit/downloads/list?q=label:Featured (at the time of this article writing, it was named as Git-1.9.0-preview20140217.exe) and install it.
• Just follow the instructions from OS X section and you are done

However, if you are a born windows user and scared of *nix, you can use Jenkins-cli.jar to run command line build commands.

• Download Jenkins-cli.jar from http://<your_jenkins_server_url>/jnlpJars/jenkins-cli.jar. (Here <your_jenkins_server_url> is your respective Jenkins server URL (development or staging))
• Go to http://<your_jenkins_server_url>/cli and build your command by following the instructions there.

Again do not forget to save the command somewhere. You can also create different batch files for different projects for even easier operation.

Disclaimer: I am using OS X/*nix while writing this article and hence tested those environments. I did not test the windows .jar option. Please let me know if you face any issue here. I will fix/correct and will update this article. Thank you!

And please forgive my pinches for using windows. I just could not love windows over *nix OSes yet.

Next recommended article to read: how to commit, push and trigger Jenkins build at once in one command.

The post How to trigger Jenkins build from command line appeared first on Itty Bitty Talks.

Drupal is the magic CMS to build a website really fast. Using Drupal modules like views, panels, context, display suites, you can create a website almost without writing any code.

Today we will discuss the functionality of context module. Consider the following statements.

• If your age is between 13 and 19, then you are a teenager.
• If you are a pragmatic programmer, then you are a hard worker.
• If the page URL starts with ‘en’, then set the language context to ‘English’.

We know these statements (if <condition>, then <action>) are very common in Drupal development. Using context module, you can implement this kind of conditional statements and their actions very easily without writing any code.

Lets see how.

Install the module and dependencies

drush dl context, ctools

drush en ctools, context, context_ui –y

Context module is dependent on ctools module, so install ctools as well. Enable Context UI for context administration purpose.

Create a context

• Login to your site as an administrator.
• Go to ‘Administration > Structure > Context’.
• Click on ‘Add’.

Name your context. It has to be unique.

We recommend follow the variable naming convention (no space, small letters, no special characters, underscores not dashes). That way you will be able to export, import your context using features.

Setup conditions.

Some example conditions that you can setup are:

• If the path is …
• If the language is …
• If the taxonomy term is …
• If the taxonomy vocabulary is …
• If the value of a date field is …
• If content type is …
• If logged in user role is …
• If the organic group of the content is …
• Etc

Setup Reactions

Some example reactions:

• Publish a block
• Set breadcrumbs
• Set OG group context
• Set some meta data
• Exclude the page from search engines etc
• Disable some theme region for the page
• Set a CSS body class for the theme etc

Well, these conditions and reactions are not all. You can implement your own custom context conditions and reactions using Drupal context API. We will discuss that one the other day.

Happy Drupaling

The post Drupal Context Module: How to appeared first on Itty Bitty Talks.