{"id":3290,"date":"2025-01-06T07:47:45","date_gmt":"2025-01-06T10:47:45","guid":{"rendered":"https:\/\/thiagorossi.com.br\/blog\/?p=3290"},"modified":"2025-12-12T09:19:48","modified_gmt":"2025-12-12T12:19:48","slug":"laravel-eloquent-collections","status":"publish","type":"post","link":"https:\/\/thiagorossi.com.br\/blog\/laravel-eloquent-collections\/","title":{"rendered":"Laravel Eloquent Collections"},"content":{"rendered":"Tempo de leitura: <\/span> 4<\/span> minutos<\/span><\/span>\n

Laravel Eloquent Collections<\/strong>: No universo Laravel, a manipula\u00e7\u00e3o eficiente de conjuntos de dados \u00e9 facilitada pelas Eloquent Collections<\/strong>. Uma Collection<\/em> \u00e9 uma inst\u00e2ncia da classe Illuminate\\Support\\Collection<\/code> que envolve um array de dados, fornecendo uma interface fluente<\/strong> e rica em m\u00e9todos<\/strong> para iterar, filtrar, transformar e agregar esses dados de forma leg\u00edvel e poderosa.<\/p>\n\n\n\n

Toda consulta bem-sucedida do Eloquent (como User::all()<\/code>) retorna uma Collection<\/em>, permitindo o uso imediato de seus m\u00e9todos.<\/p>\n\n\n\n

<\/div>\n\n\n\n

1. \ud83c\udfaf M\u00e9todos Essenciais para Manipula\u00e7\u00e3o de Collections<\/h2>\n\n\n\n

A for\u00e7a das Collections reside na sua vasta biblioteca de m\u00e9todos, que eliminam a necessidade de loops<\/em> manuais na maioria das vezes.<\/p>\n\n\n\n

<\/div>\n\n\n\n

A. Itera\u00e7\u00e3o e Transforma\u00e7\u00e3o<\/h3>\n\n\n\n
M\u00e9todo<\/strong><\/td>Fun\u00e7\u00e3o<\/strong><\/td>Exemplo<\/strong><\/td><\/tr><\/thead>
map()<\/code><\/strong><\/td>Aplica um callback a cada item, retornando uma nova Collection.<\/td>$nomes = $users->map(fn($u) => $u->name)->all();<\/code><\/td><\/tr>
each()<\/code><\/strong><\/td>Itera sobre a Collection para executar a\u00e7\u00f5es (efeito colateral).<\/td>$users->each(fn($u) => $u->active = true);<\/code><\/td><\/tr>
pluck()<\/code><\/strong><\/td>Extrai os valores de uma chave espec\u00edfica, opcionalmente usando outra chave para indexar.<\/td>$ids = $users->pluck('id');<\/code><\/td><\/tr>
flatMap()<\/code><\/strong><\/td>Mapeia e achata o resultado em uma \u00fanica Collection (\u00fatil para cole\u00e7\u00f5es aninhadas).<\/td>$tags = $posts->flatMap(fn($p) => $p->tags);<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
<\/div>\n\n\n\n

B. Filtragem e Busca<\/h3>\n\n\n\n
M\u00e9todo<\/strong><\/td>Fun\u00e7\u00e3o<\/strong><\/td>Exemplo<\/strong><\/td><\/tr><\/thead>
filter()<\/code><\/strong><\/td>Retorna itens que passam no teste do callback.<\/td>$ativos = $users->filter(fn($u) => $u->status == 'active');<\/code><\/td><\/tr>
reject()<\/code><\/strong><\/td>Retorna itens que n\u00e3o<\/strong> passam no teste do callback.<\/td>$inativos = $users->reject(fn($u) => $u->status == 'active');<\/code><\/td><\/tr>
where()<\/code><\/strong><\/td>Filtra a Collection pelo par chave\/valor.<\/td>$joao = $users->where('name', 'Jo\u00e3o');<\/code><\/td><\/tr>
contains()<\/code><\/strong><\/td>Verifica se a Collection cont\u00e9m um valor ou par chave\/valor.<\/td>$users->contains('email', 'admin@app.com');<\/code><\/td><\/tr>
first()<\/code> \/ last()<\/code><\/strong><\/td>Retorna o primeiro ou \u00faltimo item que satisfa\u00e7a a condi\u00e7\u00e3o (ou o primeiro\/\u00faltimo item).<\/td>$primeiro = $users->first(fn($u) => $u->age > 30);<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
<\/div>\n\n\n\n

C. Agrega\u00e7\u00e3o e Ordena\u00e7\u00e3o<\/h3>\n\n\n\n
M\u00e9todo<\/strong><\/td>Fun\u00e7\u00e3o<\/strong><\/td>Exemplo<\/strong><\/td><\/tr><\/thead>
sum()<\/code><\/strong><\/td>Soma os valores de uma chave ou dos resultados de um callback.<\/td>$total = $items->sum('price');<\/code><\/td><\/tr>
count()<\/code><\/strong><\/td>Retorna o n\u00famero de itens.<\/td>$items->count();<\/code><\/td><\/tr>
avg()<\/code><\/strong><\/td>Calcula a m\u00e9dia dos valores.<\/td>$media = $grades->avg();<\/code><\/td><\/tr>
sortBy()<\/code> \/ sortByDesc()<\/code><\/strong><\/td>Ordena a Collection com base em uma chave ou callback.<\/td>$users->sortBy('name');<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
<\/div>\n\n\n\n

2. \ud83e\udde9 Cole\u00e7\u00f5es Personalizadas (Custom Collections)<\/h2>\n\n\n\n

Para encapsular l\u00f3gica de neg\u00f3cios complexa<\/strong> e tornar o c\u00f3digo mais reutiliz\u00e1vel, voc\u00ea pode criar uma classe que estende Illuminate\\Support\\Collection<\/code>.<\/p>\n\n\n\n

<\/div>\n\n\n\n

A. Criando a Collection Personalizada<\/h3>\n\n\n\n

Defina novos m\u00e9todos de dom\u00ednio na sua nova classe.<\/p>\n\n\n\n

PHP<\/p>\n\n\n\n

\/\/ app\/Support\/ProductCollection.php\n<?php\n\nnamespace App\\Support;\n\nuse Illuminate\\Support\\Collection;\n\nclass ProductCollection extends Collection\n{\n    \/**\n     * Calcula o valor total do invent\u00e1rio (pre\u00e7o * quantidade)\n     *\/\n    public function totalInventoryValue(): float\n    {\n        return $this->sum(function ($product) {\n            return $product->price * $product->stock;\n        });\n    }\n\n    \/**\n     * Aplica um desconto a todos os produtos na cole\u00e7\u00e3o\n     *\/\n    public function applyDiscount(int $percentage): self\n    {\n        return $this->map(function ($product) use ($percentage) {\n            $product->price = $product->price * (1 - ($percentage \/ 100));\n            return $product;\n        });\n    }\n}\n<\/code><\/pre>\n\n\n\n
<\/div>\n\n\n\n
B. Vinculando ao Eloquent Model<\/h3>\n\n\n\n
Para que o Eloquent retorne sua classe personalizada, sobrescreva o m\u00e9todo newCollection()<\/code> no seu Model<\/em>.<\/p>\n\n\n\n
PHP<\/p>\n\n\n\n
\/\/ app\/Models\/Product.php\n<?php\n\nnamespace App\\Models;\n\nuse App\\Support\\ProductCollection;\nuse Illuminate\\Database\\Eloquent\\Model;\n\nclass Product extends Model\n{\n    \/\/ ...\n\n    \/**\n     * Sobrescreve o m\u00e9todo para retornar a Collection personalizada\n     *\/\n    public function newCollection(array $models = []): ProductCollection\n    {\n        return new ProductCollection($models);\n    }\n}\n<\/code><\/pre>\n\n\n\n
<\/div>\n\n\n\n
C. Utiliza\u00e7\u00e3o<\/h3>\n\n\n\n
Agora, qualquer resultado de consulta do Product<\/code> ter\u00e1 acesso aos seus m\u00e9todos personalizados:<\/p>\n\n\n\n
PHP<\/p>\n\n\n\n
\/\/ Retorna uma inst\u00e2ncia de ProductCollection\n$inventory = Product::where('active', 1)->get(); \n\n\/\/ Uso do m\u00e9todo personalizado\n$totalValue = $inventory->totalInventoryValue();\n\n\/\/ Uso do m\u00e9todo personalizado e encadeamento fluente\n$productsWithDiscount = $inventory->applyDiscount(15)\n                                  ->sortByDesc('price');\n<\/code><\/pre>\n\n\n\n
<\/div>\n\n\n\n
3. \ud83d\udd04 Convertendo e Manipulando Tipos<\/h2>\n\n\n\n
M\u00e9todo<\/strong><\/td>Fun\u00e7\u00e3o<\/strong><\/td>Exemplo<\/strong><\/td><\/tr><\/thead>
toArray()<\/code><\/strong><\/td>Converte a Collection (e seus Models internos) para um Array PHP aninhado.<\/td>$array = $users->toArray();<\/code><\/td><\/tr>
toJson()<\/code><\/strong><\/td>Converte a Collection para uma string JSON.<\/td>return $users->toJson();<\/code><\/td><\/tr>
values()<\/code><\/strong><\/td>Retorna uma nova Collection com as chaves reindexadas sequencialmente.<\/td>$users->values();<\/code><\/td><\/tr>
keys()<\/code><\/strong><\/td>Retorna uma Collection contendo apenas as chaves da Collection original.<\/td>$users->keys();<\/code><\/td><\/tr>
merge()<\/code><\/strong><\/td>Combina duas Collections ou arrays.<\/td>$c1->merge($c2);<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
<\/div>\n\n\n\n
\u2705 Conclus\u00e3o Laravel Eloquent Collections<\/h2>\n\n\n\n
Laravel Eloquent Collections<\/strong>: As Eloquent Collections<\/em> s\u00e3o a ferramenta fundamental para o processamento de dados p\u00f3s-consulta<\/strong> no Laravel. Elas incentivam a escrita de c\u00f3digo funcional, limpo e encade\u00e1vel. Ao dominar os m\u00e9todos nativos e, crucialmente, ao criar Cole\u00e7\u00f5es Personalizadas<\/strong> para encapsular a l\u00f3gica de dom\u00ednio, voc\u00ea garante maior reutiliza\u00e7\u00e3o<\/strong> e manutenibilidade<\/strong> no seu c\u00f3digo, aprimorando significativamente a qualidade das suas aplica\u00e7\u00f5es Laravel.<\/p>\n\n\n\n
Mas antes de dominar o Laravel, se for o seu caso, toda jornada tem um in\u00edcio. Vamos entender quais s\u00e3o os conhecimentos b\u00e1sicos necess\u00e1rios para aproveitar ao m\u00e1ximo este poderoso framework. Para iniciar seus estudos no Laravel, voc\u00ea precisar\u00e1 dominar as seguintes tecnologias:<\/p>\n\n\n\n
\n
\n
\"HTML\"<\/a>
HTML<\/figcaption><\/figure>\n<\/div>\n\n\n\n
\n
\"CSS\"<\/a>
CSS<\/figcaption><\/figure>\n<\/div>\n\n\n\n
\n
\"Javascript\"<\/a>
JavaScript<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n
\n
\n
\"SQL\"<\/a>
SQL<\/figcaption><\/figure>\n<\/div>\n\n\n\n
\n
\"Capa<\/a>
PHP<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n
E se voc\u00ea gosta do nosso conte\u00fado, n\u00e3o deixe de contribuir adquirindo os servi\u00e7os e produtos dos nossos apoiadores e empresas que somos associados:<\/p>\n\n\n\n
\n
\n
\"Hospedagem<\/a><\/figure>\n<\/div>\n\n\n\n
\n
\"Ofertas<\/a><\/figure>\n<\/div>\n\n\n\n
\n
\"Amazon<\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
Tempo de leitura: <\/span>  4<\/span> minutos<\/span><\/span>Laravel Eloquent Collections: No universo Laravel, a manipula\u00e7\u00e3o eficiente de conjuntos de dados \u00e9 facilitada…<\/p>\n","protected":false},"author":1,"featured_media":1642,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-3290","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-laravel","wpcat-18-id"],"yoast_head":"\nLaravel Eloquent Collections - BLOG THIAGO ROSSI<\/title>\n<meta name=\"description\" content=\"Laravel Eloquent Collections: Este artigo explora em detalhes as eloquent collections no Laravel, desde os m\u00e9todos dispon\u00edveis at\u00e9 a cria\u00e7\u00e3o..\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/thiagorossi.com.br\/blog\/laravel-eloquent-collections\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Laravel Eloquent Collections - 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