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I stopped working on the Osm Admin project, for financial reasons. Did it hurt? A lot. Was it necessary? Unfortunately, yes. This post is a short retrospection on this matter.

Implemented in Osm Admin:

• new ALTER TABLE algorithm
• NULL to non-NULL data conversion
• new query test suite

This time, I tackled adding an explicit property to an existing table, and then making it non-nullable.

It raised the need for data conversions - additional handling of the existing data - or otherwise, the database engine fails, or the data becomes invalid.

And it made me split migrations in two parts - the one that runs before the data conversion, and the other one that runs afterwards.

While working on diff algorithm I noticed a certain pattern that I use over an over again.

Using this pattern, I implemented notification table diff.

Finally, I rearranged diff/migration code for better code readability.

Yesterday, I moved the table creation code into new schema diff migration engine.

Now, working on notification table migrations.

This time:

• I found out that the whole search index creation should be done during indexing, not migrations.
• I refactored diff algorithm and made it much easier to read.

Before digging into property diff algorithm, let's dig into how exactly it's used, and what other property-related logic is there.

Yesterday, I continued working on schema migrations:

• implemented table diff algorithm;
• took into consideration table renames.

After a system update, I've got some problem with my laptop, and one thing to check was system log files.

This got me thinking: what makes a good log for my own application? And I think that application logs are as useful as they are able to answer potential questions I may have when an application is in production.

Let's think what kind of questions I might have, and what information might be useful to answer them.

Recently, I fixed numerous issues to make the first migration tests work.

Then, I started implementing the schema diff algorithm - the basis for schema migrations.

More dots got connected in the schema migration design, see this post for details.

Then, I tried to return to TDDing it, but strange errors met me there, so I left them to be resolved in the next piece.

Schema migrations are going to be generated and executed automatically under gulp watch. It will result in lots of tiny migrations: add a column, change its type, make it not nullable, and so on.

It's convenient during development, but it might be not optimal to reapply in production. Indeed, it's better to convert a large table to new structure all at once rather than running a conversion for each of the tiny migration.

This observation contradicts the previously stated migration workflow, so let's update it.

In spirit of TDD, I started with a meaningful, but failing test that is reasonably fast. Then, I worked to make it green:

• implemented the loading of schema fixtures from the codebase;
• worked on generating migration files.

After drafting some ideas of how the schema migrations should actually work, let's start implementing it in TDD way.

The goal of the current iteration is to adjust the database schema and preserve/convert existing data according to any changes in schema classes, grids, forms or indexers.

This post presents some thoughts how it might work with class definitions.

After finishing the iteration "#17 Minimum UI", I revisited the goals and the scope of the minimum viable product, and picked the most pressing task for the next iteration - "#18 Database Schema Changes".

I implemented the last user action that is typical to a CRUD application - object deletion.

Done:

• routes responsible for creating new products, and modifying existing products
• incremental indexing
• cloning query objects
• INSERT INTO ... SELECT ... statements

After you got a project up and running, let's have a look what's inside. Every directory has its purpose. Learn where to put your creative efforts!

Note. This post is moved to Osm Framework documentation.

In Osm Framework, an application is a set of modules that you run as a whole. There are several applications defined in the project, each having its own PHP class. Mostly, deal with the main one, Osm\App\App. Beside the class name, every application also has a name, the main one is named Osm_App.

Access the current application object, and the main parts of Osm Framework, via the global $osm_app object and its properties. Add your own long-living objects there. Run an application using its HTTP or console entry point, or using Apps::run().

Note. This post is moved to Osm Framework documentation.

Modular software development is a well-known practice of dividing your application into several modules, each doing one thing, and doing it well. It increases readability and simplifies maintenance, as application concerns are fully separated from one another, easier to reason about, and to debug.

Modular development also encourages reuse. It's like a puzzle. Using one set of modules, you'll get an e-commerce application, using another set of modules - you'll get a blog application.

Note. This post is moved to Osm Framework documentation.

Using dynamic traits, customize anything. Inject your code in the beginning, in the end, or instead of any standard method. Even more, add new properties and methods to the existing standard classes.

Note. This post is moved to Osm Framework documentation.

Computed properties are one of Osm Framework pillars. They help to execute code only once, and only if it's actually needed. Computed properties control object serialization and caching. They provide meaningful insights into class interdependencies. Finally, computed properties are easy to test.

Note. This post is moved to Osm Framework documentation.

Osm Framework uses Monolog library for logging. Use standard loggers defined in the $osm_app->logs object, or add your own. Control logging in the settings.{app_name}.php and .env.{app_name} files.

Note. This post is moved to Osm Framework documentation.

After pushing changes to GitHub, osm.software website is updated without any additional manual action. On push, GitHub executes the deployment script on the production server. Most changes are done to content only, and in this case, the deployment script only updates the search index. Otherwise, with the website being on maintenance, it additionally updates Composer and Node dependencies, builds JS and CSS assets, and runs the database migrations.

Install PHP 8, MySql, Node, Gulp and ElasticSearch. Clone the project. Edit project settings. Finally, run few commands in the command line.

Install and use osm, osmc, osmt and osmh command line aliases for faster command typing.

Note. This post is moved to Osm Framework documentation.

Once PHP 8, Node and Gulp are installed, create new projects quickly using the command line.

Note. This post is moved to Osm Framework documentation.

Today, osm.software reached an important milestone - 100% Lighthouse score.

This article explains how to manage and assign blog categories.

Readers of osm.software blog can search the blog for a specific phrase, and narrow down listed articles using multi-select layered navigation. Let's see how it works under the hood.