dingo-query-mapper

Uses Dingo/API Request Query Parameters to filter Laravel Collections. For example, you are able to automatically filter, sort, and limit collections based on query parameters of the URI.

Installation

First, add the respective line to your composer file

"require" : {
   ... ,
   "johannesschobel/dingoquerymapper": "dev-master" ,
}

and run composer install to install the new component.

Then add respective ServiceProvider from the package to your config/app.php configuration file, like this:

'providers' => [
   ... ,
   JohannesSchobel\DingoQueryMapper\DingoQueryMapperServiceProvider::class,
],

If you want, you can overwrite the basic configuration using the following command:

php artisan vendor:publish --provider="JohannesSchobel\DingoQueryMapper\DingoQueryMapperServiceProvider" --tag="config"

This will copy the dingoquerymapper configuration file to your config folder. Using this file, you can customize the limit parameter or the query parameters to be excluded from the service provider. This is handy, if you need to omit parameters from automatically parsed for filtering (e.g., you may want to exclude the token parameter if you are using JWT).

Usage

Example

In order to use the plugin, simply create a new instance from DingoQueryMapper and pass the request. Furthermore, you want to call respective createFromXXX() method from the DingoQueryMapper, which basically allows to create the mapper from various inputs (e.g., Collection, Builder, ...)

Consider the following example:

public function getAllUsers(Request $request) {

    $users = User::all()->get();
    $qm = new DingoQueryMapper($request);
    $users = $qm->createFromCollection($users)->paginate();
        
    // now return the result
    return response->json($users);
}

If you call the respective URI, for example like so:

/index?name=j*&age>=18&limit=10&page=3

it will output (a maximum of) 10 Users per page, where the name attribute starts with j and the age is greater or equal than 18 starting on page 3.

Dingo/API Example

If you use Dingo/API as your preferred API framework, you can use this package right away. If you are not using Dingo/API, you should really consider using it - it is awesome!

However, all of the information described above still remains when using Dingo/API. Only, the returning the results varies because you need to use Dingo's response objects.

You can simply return your results using

public function getAllUsers(Request $request) {

    $users = User::all()->get();
    $qm = new DingoQueryMapper($request);
    $users = $qm->createFromCollection($users)->paginate();
        
    // now return the result
    
    return $this->response
       ->paginator($users, new UserTransformer());
}

That's all - really!

Parameters

This plugin provides some pre-defined parameter names to be automatically filled.

limit and page

In order to limit the amount of response elements, simply add respective limit query parameter, like this:

/index?limit=20

This will only return the (first) 20 entries of the result. In order to request the next 20 entries, simply add a page parameter to the query, like this:

/index?limit=20&page=2

will return the next 20 entries that are located on page 2.

sort

In order to sort the results using different parameters, you can simply concatenate them using ,. In order to provide ASC and DESC sorting, you may prepend a - before respective attribute.

For example

/index?sort=age,-name

sorts the results by age (ascending), then by name (descending; note the - before the name field!)

custom filters

Of course you may pass custom query parameters to the builder in order to filter the requested data. For example:

• name=j* : filters all elements, where the name starts with j,
• age>=18 : filters all elements, where the age is 18 or higher,
• city!=berlin : filters all elements, where the city is not berlin

If you try to filter using a column that does not exist in the respective model, it will be ignored.

At the moment, this plugin offers the following operators:

• = --> compare equality
• != --> compare unequality
• < --> smaller than
• <= --> smaller or equal than
• => --> greater or equal than
• > --> greater than

Of course you can combine the filters with the other query parameters:

/index?name=j*&age>=18&sort=age,-name&limit=20

would return the first 20 elements, where the name starts with j, the age is >= 18 sorted by age ASC and name DESC.