README

Introduction

A Laravel base controller class and a trait that will enable to add filtering, sorting, eager loading and pagination to your resource URLs.

Functionality

Parse GET parameters for dynamic eager loading of related resources, sorting and pagination
Advanced filtering of resources using filter groups
Use Bulwark\Architect for sideloading, id loading or embedded loading of related resources
... Ideas for new functionality is welcome here

For Laravel 5.4 and above

composer require bulwark/dream ~1.0

Usage

The examples will be of a hypothetical resource endpoint /books which will return a collection of Book, each belonging to a Author.

Book n ----- 1 Author

Available query parameters

Implementation

<?php

namespace App\Http\Controllers;

use Bulwark\Api\Controller\EloquentBuilderTrait;
use Bulwark\Api\Controller\LaravelController;
use App\Models\Book;

class BookController extends LaravelController
{
    use EloquentBuilderTrait;

    public function getBooks()
    {
        // Parse the resource options given by GET parameters
        $resourceOptions = $this->parseResourceOptions();

        // Start a new query for books using Eloquent query builder
        // (This would normally live somewhere else, e.g. in a Repository)
        $query = Book::query();
        $this->applyResourceOptions($query, $resourceOptions);
        $books = $query->get();

        // Parse the data using Optimus\Architect
        $parsedData = $this->parseData($books, $resourceOptions, 'books');

        // Create JSON response of parsed data
        return $this->response($parsedData);
    }
}

Syntax documentation

Eager loading

Simple eager load

/books?includes[]=author

Will return a collection of 5 Books eager loaded with Author.

IDs mode

/books?includes[]=author:ids

Will return a collection of Books eager loaded with the ID of their Author

Sideload mode

/books?includes[]=author:sideload

Will return a collection of Books and a eager loaded collection of their Authors in the root scope.

See mere about eager loading types in Optimus\Architect's README

Pagination

Two parameters are available: limit and page. limit will determine the number of records per page and page will determine the current page.

/books?limit=10&page=3

Will return books number 30-40.

Sorting

Should be defined as an array of sorting rules. They will be applied in the order of which they are defined.

Sorting rules

Example

[
    {
        "key": "title",
        "direction": "ASC"
    }, {
        "key": "year",
        "direction": "DESC"
    }
]

Will result in the books being sorted by title in ascending order and then year in descending order.

Filtering

Should be defined as an array of filter groups.

Filter groups

Filters

Operators

Special values

Custom filters

Remember our relationship Books n ----- 1 Author. Imagine your want to filter books by Author name.

[
    {
        "filters": [
            {
                "key": "author",
                "value": "Bulwark",
                "operator": "sw"
            }
        ]
    }
]

Now that is all good, however there is no author property on our model since it is a relationship. This would cause an error since Eloquent would try to use a where clause on the non-existant author property. We can fix this by implementing a custom filter. Where ever you are using the EloquentBuilderTrait implement a function named filterAuthor

public function filterAuthor(Builder $query, $method, $clauseOperator, $value)
{
    // if clauseOperator is idential to false,
    //     we are using a specific SQL method in its place (e.g. `in`, `between`)
    if ($clauseOperator === false) {
        call_user_func([$query, $method], 'authors.name', $value);
    } else {
        call_user_func([$query, $method], 'authors.name', $clauseOperator, $value);
    }
}

Note: It is important to note that a custom filter will look for a relationship with the same name of the property. E.g. if trying to use a custom filter for a property named author then Dream will try to eagerload the author relationship from the Book model.

Custom filter function

Examples

[
    {
        "or": true,
        "filters": [
            {
                "key": "author",
                "value": "Bulwark",
                "operator": "sw"
            },
            {
                "key": "author",
                "value": "Prime",
                "operator": "ew"
            }
        ]
    }
]

Books with authors whoose name start with Bulwark or ends with Prime.

[
    {
        "filters": [
            {
                "key": "author",
                "value": "Brian",
                "operator": "sw"
            }
        ]
    },
    {
        "filters": [
            {
                "key": "year",
                "value": 1990,
                "operator": "gt"
            },
            {
                "key": "year",
                "value": 2000,
                "operator": "lt"
            }
        ]
    }
]

Books with authors whoose name start with Brian and which were published between years 1990 and 2000.

Optional Shorthand Filtering Syntax (Shorthand)

Filters may be optionally expressed in Shorthand, which takes the a given filter array[key, operator, value, not(optional)] and builds a verbose filter array upon evaluation.

For example, this group of filters (Verbose)

[
    {
        "or": false,
        "filters": [
            {
                "key": "author",
                "value": "Bulwark",
                "operator": "sw"
            },
            {
                "key": "author",
                "value": "Prime",
                "operator": "ew"
            }
            {
                "key": "deleted_at",
                "value": null,
                "operator": "eq",
                "not": true
            }
        ]
    }
]

May be expressed in this manner (Shorthand)

[
    {
        "or": false,
        "filters": [
            ["author", "sw", "Bulwark"],
            ["author", "ew", "Prime"],
            ["deleted_at", "eq", null, true]
        ]
    }
]

Standards

This package is compliant with PSR-1, PSR-2 and PSR-4. If you notice compliance oversights, please send a patch via pull request.

Testing

$ phpunit

Contributing

Please see CONTRIBUTING for details.

License

The MIT License (MIT). Please see License File for more information.

bulwark / dream

Maintainers

Details