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Osm Admin: Adding Explicit Properties. Data Conversions

2022 April Osm Admin

7 months ago ∙ 4 minutes read

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.

Osm Admin: Logging

2022 April Osm Admin

7 months ago ∙ 2 minutes read

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.

Osm Admin: Schema Migrations In Development Vs Production

2022 April Osm Admin

7 months ago ∙ 2 minutes read

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.

News: 2022 Jan 31 - Feb 18

2022 February News

9 months ago ∙ 3 minutes read

I came with an idea of much cleaner Osm Admin data class "markup", and more straightforward architecture, and I decided to give it a go in a separate experimental branch v0.2, and to see if it's viable.

After three weeks of implementation effort, I can say that it is viable, and it's so much better! And it's not a completely new effort, I mostly copy code from v0.1 and some parts of osmphp/framework:old_v4, and adapt it.

You can already define data classes using new markup, generate the database tables, and query it using new formula syntax. I really wanted to come with some UI working, but there wasn't enough time for that. It stays my priority for the next iteration.

News: 2022 Jan 14 - 28

2022 January News

10 months ago ∙ 2 minutes read

Last two weeks were about implementing initial version of an Osm Admin grid, integrating it seamlessly with the editing form, and enabling mass-editing of multiple objects.

After finishing it, I realized that Osm Admin had become bigger than Osm Framework! To keep up, I started writing docs for it.

And now, you have a step-by-step guide for creating a project, adding Osm Admin to it and a practical example of an admin area that you can copy to your project and try it out locally.

News: 2021 Dec 20 - 2022 Jan 14

2022 January News

10 months ago ∙ 3 minutes read

The last 4 weeks were mostly a vacation. It's been a time for reflection, but still, I delivered some new features.

In Osm Admin, forms already allow creating new objects and saving them to the database, and editing one or several existing objects.

I've also implemented URL query filters that are applied to the underlying database query and that can be displayed in the user interface.

From now on, Osm Framework and all projects built with it - can be installed and developed under Apache and on Windows.

Osm Admin: Filters

2022 January Osm Admin

10 months ago ∙ 3 minutes read

In the user interface, you can narrow displayed data using grid column filters, or filters displayed in the sidebar. To enable that, apply #[Filter\*] attributes to class properties.

Applied filters appear in the URL query parameters, for example, .../edit?id=5+16+19, and on the page.

You can apply filters not only to a grid page, but also to a form page - to mass edit all matching objects, or to an action URL (edit, delete, or custom) - to perform the action on all matching objects.

In the same way, you can apply filters to the API URLs in order to retrieve or modify matching objects in a script.

News: 2021 Dec 06 - Dec 17

2021 December News

11 months ago ∙ 2 minutes read

In Osm Admin, I've finished indexing. It means that whenever you modify an object in the database, the changes are automatically propagated to all dependent indexed properties in the database.

I've also introduced a grid/form pair as the main user interface concept that is optimized for performing operations on multiple objects. There is also a programming interface (API) that will internally work in the same way, but without visuals. I implemented a part of this interface - an object creation form.

Osm Framework and all projects built with it - including this website and Osm Admin - are upgraded to TailwindCSS 3.0.

News: 2021 Nov 22 - Dec 03

2021 December News

11 months ago ∙ 3 minutes read

For the last two weeks, I figured out two core features that will allow Osm Admin to stand out from other CRUD applications:

  1. It will allow mass editing of data objects.
  2. It will automatically propagate data changes throughout the database.

The foundation for the mass editing feature is data queries. Data propagation will be ensured via indexing.

I've been working on the Osm Admin indexing engine, and it's still in progress. While working on it, I reworked the inner working of data queries. Finally, I've achieved a very clear separation of various Osm Admin concerns, and documented it.

In Osm Core, I added reflection over class methods.

Osm Admin: Query Formulas

2021 November Osm Admin

1 year ago ∙ 3 minutes read

After 3 days of intensive work, I've got dot syntax working!

Along the way, I refactored the query internals once again, which reminds me a heuristics saying that you've got to implement something three times to get it right :)

New query implementation uses the concept of formulas - SQL-like expressions used for selecting, filtering and sorting data. Currently, formulas are quite limited, but with time, they should be a really powerful feature.

Osm Admin: Indexing (2)

2021 November Osm Admin

1 year ago ∙ 3 minutes read

Today, I implemented computation of indexed properties during insert. The implementation dictated some changes in indexed property definitions compare to the initial design, and how indexers are reflected into the data schema.

Also, I implemented a table query class working on the top of Laravel Query\Builder. More about it next time, for now I'll review how indexed properties are computed during INSERT operation.

News: 2021 Nov 8 - Nov 19

2021 November News

1 year ago ∙ 3 minutes read

I had two weeks full of meaningful, productive work. I started with sketching Osm Admin grid and form pages, and implemented a very basic, but working home page, and success/error messages. To enable that, Osm Framework now have extensible Blade templates, and a nice JavaScript solution for capturing user input into a modal dialog box, or into some picker component.

Then, I undertook a major refactoring of Osm Admin, including moving lots of pieces of code to their new places, stabilizing the underlying object model, rewriting database migrations and sketching future effort on data indexing. During this effort, I implemented generic object hydration and reflection over named subtypes.

I've already shared most of this information on Twitter, so if you are reading this, consider following me on Twitter and getting daily updates.

Osm Admin: Schema Hydration

2021 November Osm Admin

1 year ago ∙ 3 minutes read

I developed dehydrate()/hydrate() functions for a very practical need - storing the data class schema:

  • in cache - to reduce processing time spent on reflection;
  • and in database - to compare current and new database schema, and only add new tables and columns.

This article describes the information stored in the schema, and unit tests that I prepared in order to be sure that schema classes are property hydrated.

Osm Admin: Subclasses

2021 November Osm Admin

1 year ago ∙ 1 minute read

As described in Migrations, most data objects of the same class will be stored in a database table.

But what about subclasses? In an e-commerce application, bags, dresses, and digital products, collectively known as subclasses, are all products stored in products table, and they may have bad-specific, dress-specific or digital product specific properties that should also be stored there.

This article describes how subclasses are defined and stored in Osm Admin.

News: 2021 Oct 11 - Oct 22

2021 October News

1 year ago ∙ 1 minute read

This sprint was dedicated to writing Osm Framework documentation, and indeed, there are 8 new in-depth documentation articles, 4-5 minutes long each.

Despite documentation focus, I kept improving the website. From now on, you can assign a canonical URL to a blog post or a documentation page, and use GitHub friendly relative URLs in documentation.

But the most important thing - I started sharing progress and insights daily on Twitter.

News: 2021 Sep 27 - Oct 08

2021 October News

1 year ago ∙ 4 minutes read

osm.software website. From now on, Osm Framework documentation resides in the docs/ directory of the osmphp/framework repository, and it is displayed in a separate section of osm.software website. New data source indexing engine allows running complex interdependent data synchronization with a single command, osm index. New Placeholder class simplifies dynamic Markdown content generation.

Osm Framework. Apply dynamic traits within the same file using #[UseIn] attribute. Implement fast dynamic routing using new DynamicRoute class. Generate URLs using new $osm_app->base_url property.

News: 2021 Sep 13 - Sep 24

2021 September News

1 year ago ∙ 2 minutes read

This website got a completely new look. There are new blog posts diving into core Osm Framework features. Osm Framework itself offers more convenient page layout, website-wide header, footer and <head>, customizable error pages. The themes support theme-specific CSS styles and JS scripts not bound to any module. New projects come with a handy bin/install.sh script that simplifies installation on Linux. From now on, run osmh without any parameters.