mirror of
https://github.com/silverstripe/silverstripe-tagfield
synced 2024-10-22 11:05:32 +02:00
167 lines
3.9 KiB
Markdown
167 lines
3.9 KiB
Markdown
# Tag Field
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[](https://github.com/silverstripe/silverstripe-tagfield/actions/workflows/ci.yml)
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[](https://www.silverstripe.org/software/addons/silverstripe-commercially-supported-module-list/)
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Custom tag input field, for SilverStripe.
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## Overview
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Allows storing tags as a relationship, or comma-delimited strings.
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Supports autocompletion with lazy-loading.
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Note: The field is optimised for usage in the Silverstripe CMS UI.
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The form field class itself can be used outside of the CMS,
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but you'll need to build your own frontend to interpret the raw field data (`data-schema` attribute).
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## Requirements
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* Silverstripe 4.0
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## Installing
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```sh
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$ composer require silverstripe/tagfield
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```
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## Using
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### Relational Tags
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```php
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use SilverStripe\ORM\DataObject;
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class BlogPost extends DataObject
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{
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private static $many_many = [
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'BlogTags' => BlogTag::class
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];
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}
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```
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```php
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use SilverStripe\ORM\DataObject;
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class BlogTag extends DataObject
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{
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private static $db = [
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'Title' => 'Varchar(200)',
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];
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private static $belongs_many_many = [
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'BlogPosts' => BlogPost::class
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];
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}
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```
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```php
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$field = TagField::create(
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'BlogTags',
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'Blog Tags',
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BlogTag::get(),
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$this->BlogTags()
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)
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->setShouldLazyLoad(true) // tags should be lazy loaded
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->setCanCreate(true); // new tag DataObjects can be created
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```
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**Note:** This assumes you have imported the namespaces class, e.g. use
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SilverStripe\TagField\TagField;
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#### Has-One Relations
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You can also use the TagField to select values for `has_one` relations.
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Let's assume, that a `BlogPost` *has one* `BlogCategory`.
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```php
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class BlogCategory extends DataObject
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{
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private static $db = [
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'Title' => 'Varchar(200)',
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];
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}
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```
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```php
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use SilverStripe\ORM\DataObject;
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class BlogPost extends DataObject
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{
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private static $has_one = [
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'BlogCategory' => BlogCategory::class
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];
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}
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```
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```php
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$field = TagField::create(
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'BlogCategoryID',
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$this->fieldLabel('BlogCategory'),
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BlogCategory::get()
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)
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->setIsMultiple(false)
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->setCanCreate(true);
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```
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**Note:** We're using the `ID` suffix for the field-name (eg. `BlogCategoryID` instead of `BlogCategory`) and
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only allow one value by setting `->setIsMultiple(false)`
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### String Tags
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```php
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use SilverStripe\ORM\DataObject;
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class BlogPost extends DataObject
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{
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private static $db = [
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'Tags' => 'Text',
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];
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}
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```
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```php
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$field = StringTagField::create(
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'Tags',
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'Tags',
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['one', 'two'],
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explode(',', $this->Tags)
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);
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$field->setShouldLazyLoad(true); // tags should be lazy loaded
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```
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You can find more in-depth documentation in [docs/en](docs/en/introduction.md).
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## Using TagField with silverstripe-taxonomy
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TagField assumes a `Title` field on objects. For classes without a `Title` field
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use `setTitleField` to modify accordingly.
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```php
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$field = TagField::create(
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'Tags',
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'Blog Tags',
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TaxonomyTerm::get(),
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)
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->setTitleField('Name');
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```
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## Versioning
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This library follows [Semver](http://semver.org). According to Semver, you will
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be able to upgrade to any minor or patch version of this library without any
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breaking changes to the public API. Semver also requires that we clearly define
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the public API for this library.
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All methods, with `public` visibility, are part of the public API. All other
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methods are not part of the public API. Where possible, we'll try to keep
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`protected` methods backwards-compatible in minor/patch versions, but if you're
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overriding methods then please test your work before upgrading.
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## Reporting Issues
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Please [create an
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issue](http://github.com/silverstripe/silverstripe-tagfield/issues) for any bugs
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you've found, or features you're missing.
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