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Informations about the package laravel-filter

Laravel Filter

Latest Version on Packagist Build Status Latest Stable Version SensioLabsInsight

Configurable and modular Filter setup for Laravel. This is intended to make it easy to search for and filter by records using a typical web shop filter. For example, if you want to filter a catalog of products by product attributes, brand names, product lines and so forth.

The standard Filter class provided is set up to apply filters to a given (Eloquent) query builder. Additionally a CountableFilter extension of the class is provided for offering typical counts for determining what alternative filter settings should be displayed to visitors.

This is not a ready-to-use package, but a framework you can extend for your own specific applications.

Version Compatibility

Laravel PHP Package
5.8 and below 7.0+ 1.1
6.0 to 7.0 7.1+ 2.0
6.0 to 8.0 7.2+ 3.1
9.0 8.1+ 4.0
10 and up 8.1+ 5.0

Changelog

Changelog here.

Install

Via Composer

Basic Usage

Make a class that extends Czim\FilterData and set the protected properties for validation rules $rules and the default values for these attributes $defaults. Note that $defaults are used as the main means to detect which filter parameters need to be applied to the query, so make sure all filter parameters you want to implement are present in it.

Simply extend the (abstract) filter class of your choice, either Czim\Filter\Filter or Czim\Filter\CountableFilter.

Each has abstract methods that must be provided for the class to work. Once they are all set (see below), you can simply apply filter settings to a query:

A CountableFilter has an additional method that may be called:

You can find more about countable filters below.

Filter Data

You may pass any array or Arrayable data directly into the filter, and it will create a FilterData object for you. If you do not have the $filterDataClass property overridden, however, your filter will do nothing (because no attributes and defaults are set for it, the FilterData will always be empty). In your extension of the Filter class, override the property like so in order to be able to let the Filter create it automatically:

Your FilterData class should then look something like this:

Filter validation rules are optional. If no rules are provided, validation always passes. Defaults are required, and define which parameter keys are applied by the filter.

Then, passing array(able) data into the constructor of your filter will automatically instantiate that FilterData class for you. If it is an (unmodified) extension of Czim\FilterData, it will also validate the data and throw an exception if the data does not match the $rules defined in your Data class.

Alternatively, you can make your own implementation of the provided FilterDataInterface and pass it into the Filter directly.

All it needs to do is implement the interface; if you pass in data this way, the data will be set without any further checks or validation, unless you handle it in your FilterData implementation yourself.

Filters

Basic Filters take a query and apply filter parameters to it, before handing it back. (Note that the query object passed in will be modified; it is not cloned in the Filter before making modifications).

For example, if you'd do the following:

You might expect the result to be something like select * from some_models where some_column = 1 and name LIKE '%random%'.

What a filter exactly does with the filter data you pass into its constructor must be defined in your implementation. This may be done in two main ways, which can be freely combined:

Important: filter logic is only invoked if the parameter's provided value is not empty. Regardless of the method you choose to make your filter application, it will only be applied if: ! empty($value) || $value === false.

Strategies and ParameterFilters

You can define strategies for each filter parameter by adding a strategies method to your filter as follows:

If filter data is passed into the class with the same keyname as a strategy, that strategy method will be invoked. As shown above, there are different ways to provide a callable method for filters, but all methods mean passing data to a function that takes these parameters:

A ParameterFilter is a class (any that implements the ParameterFilterInterface) which may be set as a filter strategy. The apply() method on this class will be called when the filter is applied. If the ParameterFilter is given as a string for the strategy, it will be instantiated when the filter is applied.

Strategies may also be defined as closures or arrays (so long as they may be fed into a call_user_func()). The method called by this will receive the four parameters noted above.

Only if no strategy has been defined for a parameter, the callback method applyParameter() will be called on the filter itself. By default, an exception will occur.

Some common ParameterFilters are included in this package:

The fallback option: applyParameter()

If you prefer, you can also use the fallback method to handle any or all of the appliccable parameters. Simply add the following method to your filter class:

You can freely combine this approach with the strategy definitions mentioned above. The only limitation is that when there is a strategy defined for a parameter, the applyParameter() fallback will not be called for it.

Countable Filters

The CountableFilter is an extension of the normal filter that helps write special filters for, say, web shops where it makes sense to show relevant alternatives based on the current filter choices.

Take a product catalog, for instance, where you're filtering based on a particular brand name and a price range. In the filter options shown, you may want to display other brands that your visitor can filter on, but only the brands for which your have products in the chosen price range. The idea is to prevent your visitors from selecting a different brand only to find that there are no results.

CountableFilters help you to do this, by using currently set filters to generate counts for alternative options. Say you have brand X, Y and Z, and are filtering products only for brand X and only in a given price range. The countable filter makes it easy to get a list of how many products also have matches for the price range of brand Y and Z.

To set up a CountableFilter, set up the Filter as normal, but additionally configure $countables and countStrategies(). The counting strategies are similarly configurable/implementable as filtering strategies.

The return value for CountableFilter::count() is an instance of Czim\CountableResults, which is basically a standard Laravel Collection instance.

Counting Strategies

Strategies may be defined for the effects of count() per parameter for your CountableFilter, in the same way as normal filter strategies.

The same methods for defining strategies are available as with the strategies() methods above: instances (of ParameterCounters in this case), strings, closures and arrays.

The fallback for parameters without defined strategies is countParameter():

ParameterCounters

Just like ParameterFilters for Filter, ParameterCounters can be used as 'plugins' for your CountableFilter.

ParameterCounters must implement the ParameterCounterInterface, featuring this method:

Settings and Extra stuff

Joins

When joining tables for filter parameters, it may occur that different parameters require the same join(s). In order to prevent duplicate joining of tables, the Filter class has a built in helper for working with joins.

Joins so added are automatically applied to the filter after all parameters are applied.

Global Filter Settings

Sometimes it may be useful to let filter-wide settings affect the way your filter works. You can set these through a setter directly on the filter class, setSetting(). Alternatively, you can define a filter parameter strategy as Filter::SETTING, and it will be loaded as a setting before the filter is applied.

When a setting has been set in either way, you can check it with the setting() method. Note that the ParameterFilter/ParameterCounter also receives the $filter itself as a parameter and the method is public.

If a setting has not been defined, the setting() method for it will return null.

Examples

Here are some examples of using the Filter and CountableFilter classes.

Contributing

Please see CONTRIBUTING for details.

Credits

License

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


All versions of laravel-filter with dependencies

PHP Build Version
Package Version
Requires php Version ^8.1
illuminate/support Version ^10 || ^11
illuminate/database Version ^10 || ^11
myclabs/php-enum Version ^1.8
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