yassi/nova-nested-form

A Laravel Nova package that allows you to create/update/delete nested related fields from a parent form.

v3.0.4 2019-09-09 13:38 UTC

README

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Nova Nested Form

This package allows you to include your nested relationships' forms into a parent form.

Installation

composer require yassi/nova-nested-form

Update to 3.0

The afterFill and beforeFill methods are no longer available.

Attach a new relationship form to a resource

Simply add a NestedForm into your fields. The first parameter must be an existing NovaResource class and the second parameter (optional) must be an existing HasOneOrMany relationship in your model.

namespace App\Nova;

use Laravel\Nova\Fields\ID;
use Illuminate\Http\Request;
use Laravel\Nova\Fields\Text;
use Laravel\Nova\Fields\Gravatar;
use Laravel\Nova\Fields\Password;
// Add use statement here.
use Yassi\NestedForm\NestedForm;

class User extends Resource
{
    ...
    public function fields(Request $request)
    {
        return [
            ID::make()->sortable(),

            Gravatar::make(),

            Text::make('Name')
                ->sortable()
                ->rules('required', 'max:255'),

            Text::make('Email')
                ->sortable()
                ->rules('required', 'email', 'max:254')
                ->creationRules('unique:users,email')
                ->updateRules('unique:users,email,{{resourceId}}'),

            Password::make('Password')
                ->onlyOnForms()
                ->creationRules('required', 'string', 'min:6')
                ->updateRules('nullable', 'string', 'min:6'),

            // Add NestedForm here.
            NestedForm::make('Posts'),
        ];
    }

Choose when to display the form

For instance, if the nested form should only be available if the value of the "has_comments" attirbute is true, you can use:

class Post extends Resource
{
    ...
    public function fields(Request $request)
    {
        return [
            Boolean::make('Has Comments'),
            NestedForm::make('Comments')->displayIf(function ($nestedForm, $request) {
               return [
                    [ 'attribute' => 'has_comments', 'is' => true ]
               ];
        ];
    }
})

The displayIf method is excepted to return an array of array as you may want to add several conditions.

class Post extends Resource
{
    ...
    public function fields(Request $request)
    {
        return [
            Boolean::make('Has Comments'),
            Text::make('Title'),
            Text::make('Subtitle')->nullable(),
            Number::make('Number of comments allowed'),
            NestedForm::make('Comments')->displayIf(function ($nestedForm, $request) {
                return [
                    [ 'attribute' => 'has_comments', 'is' => true ],
                    [ 'attribute' => 'title', 'isNotNull' => true ],
                    [ 'attribute' => 'subtitle', 'isNull' => true ],
                    [ 'attribute' => 'title', 'includes' => 'My' ],
                    [ 'attribute' => 'number_of_comments_allowed', 'moreThanOrEqual' => 1 ],
                ];
            })
        ];
    }
}

The package will then add those conditions and dynamically update your form as you fill the fields. The available rules are:

  • is
  • isNot
  • isNull
  • isNotNull
  • isMoreThan
  • isMoreThanOrEqual
  • isLessThan
  • isLessThanOrEqual

Add a minimum or a maximum number of children

For instance, if you want every user to have at least 3 posts and at most 5 posts, simply use:

NestedForm::make('Posts')->min(3)->max(5),

Please note that the package automatically detects whether the relationship excepts many children or a single child, and sets the maximum value accordingly.

When creating a new user, 3 blank posts will be displayed. If you reach the maximum number of posts, the "Add a new post" button will disappear.

Set the default open/collapse behavior

If you want the nested forms to be opened by default, simply use:

NestedForm::make('Posts')->open(true),

Modify the default heading

You can modify the default heading using the heading() method. You can use the helper method wrapIndex() to add the current child index to your header.

NestedForm::make('Posts')->heading(NestedForm::wrapIndex() . ' // Post'),

You can also add any attribute of the current child into your heading using the helper method wrapAttribute().

NestedForm::make('Posts')->heading(NestedForm::wrapIndex() . ' // ' . NestedForm::wrapAttribute('title', 'My default title')),

Modify the index separator

You can modify the default index separator using the separator() method when you have nested forms (e.g. 1. Post, 1.1. Comment, 1.1.1. Like).

NestedForm::make('Posts')->separator('\'),