I hope you take something away...

PROBLEM
I ran 

brew upgrade

It updated my mysql installation to  8.0.12. Previously I was working with 5.7.22. Now each time I start mysql using the following commands

mysql.server start

OR

brew services mysql restsrt 

MySQL does not start properly

 Most probably the error you will face is 

.. ERROR! The server quit without updating PID file

SOLUTION 

When I run 

PROBLEM: 

I needed to add a NOT IN condition with a nested query for the WHERE condition. The usual method wont work

 

$view->query->where[1]['conditions'][] = array(
            ['field'] => 'groups_group_membership.type'
            ['value'] => array
                (
                    [0] => 'SELECT_QUERY_HERE'
                  
                )

            ['operator'] => IN
        );

SOLUTION :

The way that works

Problem:

Drupal sometimes shows errors as follows 

Message	EntityMetadataWrapperException: Unknown data property field_activity_status.

Problem 

Converting a given 3D model (a .obj file) to JSON format

Solution

Three js has its own converter now

requirements

• A model file (.obj file)
• NodeJs needs to be downloaded and installed 
• ThreeJs needs to be downloaded

The converted location in source code

https://github.com/mrdoob/three.js/tree/dev/utils/converters

Problem:  I have a select element. The options are populated using an array and while populating the select element I want to also set the selected value. How do I do this.

Solution

use v-bind:se;ected OR :selected with a boolean expression that returns TRUE or FALSE. If it returns TRUE that will be the selected value. See example below

Problem:

I messed up my /tmp folder permissions 

OS details

Solution:

Follow the below steps to get it resolved.

1. Reboot your Mac into recovery mode

2. Open Utilities menu in the top bar > open Terminal

   csrutil disable
   

3. Reboot

Problem: I had the need to re-write some view fields programatically

Solution: 

1. first use template_preprocess_views_view_fields hook

   ex:- yourtheme_preprocess_views_view_fields(&$variables)

Problem: There is no specific function in Drupal 8 which we can use to get all blocks assigned to a region. We used to have a function called block_get_blocks_by_region in Drupal 7 to do this

Solution : Although we don't have a specific function we have the tools in Drupal 8 s Object oriented hierarchy to do the same. Here is the code

 

function my_module_get_blocks_by_region($region) {

  $blocks = \Drupal::entityTypeManager()

    ->getStorage('block')->loadByProperties([

Problem

I cam across an error when synching configurations from my Drupal 8 local environment to my development environment. The error is as folllows

Error: configuration THEMENAME.settings depends on the THEMENAME extension that will not be installed after import.

Not entirely sure if this is a bug in D8 core but the root cause was that it when exporting the configurations from my local environment the "Configuration manager" module in D8 core was picking up an odd looking configuration.