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---
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gitea: none
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include_toc: true
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---
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# Queries
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## Graph or Tree
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Queries can return results in 2 formats. A graph or a tree.
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Graphs results are a collection of records (nodes) and a collection of edges. This format is more useful for network visualization.
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The tree format is more straightforward as it returns a collection of records. Each record has a **_children** and a **_parents** field and the tree can continue upwards or downwards according to the depth you have requested.
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For example to request records with their children and their children's children:
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```php
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$query->childrenDepth(2);
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```
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Maybe you only want to get a specific type of relationship:
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```php
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$query->childrenDepth(2)->childrenFields(["categories"]);
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```
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## Filters
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You can filter your query with the following format:
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```php
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$query->filter(["field_operator" => "value"]);
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// example:
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$query->filter(["date_lt" => "2020-09-15"]);
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```
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Or filters are also available:
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```php
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$query
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->filter(["price_eqn" => 10])
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->orFilter(["title_regex" => "search", "slug_regex" => "search"])
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;
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```
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## Operator List
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- regex
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- eq
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- ne
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- eqnum
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- neqnum
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- filter
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- eqtrue
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- eqfalse
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- netrue
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- nefalse
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- in:
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- innum
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- nin
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- ninnum
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- lt
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- lte
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- gt
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- gte
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- null
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- nnull
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- exists
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- nexists
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## Example
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Get 10 posts from the sports category as a tree
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```php
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$posts = $query
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->filter([
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"schema" => "posts",
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"children.categories.data.slug" => "sports",
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]
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)
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->childrenDepth(1)
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->limit(10)
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->tree();
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$posts->map(...)->toArray();
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```
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@@ -0,0 +1,101 @@
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# Website Setup
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This is an opinionated website setup. It's irrelevant to both Lucent and Laravel. It is just the way I like to organize everything.
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## Summary
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- Create a Lucent folder with Schemas, Image Filters and Pages
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- Pages are similar to controllers, but will also get used to statically generate the website
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- A Context singleton class that acts as a container for global state
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- A middleware to initiate the Context class and set the application state for the request
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- Some helper functions to make our life easier
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## Context Class
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```php
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<?php namespace App\Lucent;
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class Context
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{
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public string $website = "";
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public string $title;
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public string $description = "";
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public string $url = "";
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public string $mode = "static";
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public string $locale = "el";
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public array $data = [];
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public array $locales = ["el","en"];
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protected array $pages = [
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"homepage" => Homepage::class,
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];
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public function __construct(
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public Application $app,
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public Query $query
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){}
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public function render(string $pageName, ...$args): string
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{
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$page = $this->app->make($this->pages[$pageName]);
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return $page->render(...$args);
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}
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public function getTitle()
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{
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return empty($this->title) ? $this->website : $this->title . " | " . $this->website;
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}
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public function getFullUrl(string $path = "")
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{
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return config("app.url") . $this->generateLocaleUrl($path, $this->locale);
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}
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public function localeUrl(string $path = ""): string
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{
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return $this->generateLocaleUrl($path, $this->locale);
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}
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public function switchLocale(string $locale, $path = ""): string
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{
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return $this->generateLocaleUrl($path, $locale);
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}
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private function generateLocaleUrl(string $path, string $locale): string
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{
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if ($this->mode == "preview") {
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return config("app.url") . "/preview/" . $locale . "/" . trim($path, "/");
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}
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return config("app.url") . "/" . $locale . "/" . trim($path, "/");
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}
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}
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```
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Add this class to `AppServiceProvider` as a singleton
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```php
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$this->app->singleton(Context::class);
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```
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## Context Middleware
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```php
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<?php namespace App\Http\Middleware;
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class Context
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{
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public function __construct(public Context $context){}
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public function handle(Request $request, Closure $next, string $mode = "static"): Response
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{
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$this->context->locale = $request->route("locale");
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App::setLocale($this->meta->locale);
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$this->context->mode = $mode;
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$this->context->loadData();
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return $next($request);
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}
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}
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```
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Add the middleware inside the HTTP Kernel file.
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+1
-1
@@ -1,7 +1,7 @@
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<?php
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return [
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"env" => env("LUCENT_ENV", env('APP_ENV')),
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"env" => env("LUCENT_ENV", "production"),
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"schemas_path" => env("LUCENT_SCHEMAS_PATH", "app/Lucent"),
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"database" => env('LUCENT_DB_CONNECTION', env('DB_CONNECTION',"sqlite")),
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"name" => env("LUCENT_NAME", "Lucent"),
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