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select (selectMultipleSideBySide)¶

This page describes the select type with renderType='selectMultipleSideBySide'.

Two select fields, items can be selected from the right field, selected items are displayed in the left select.

Table of contents:

Example
Properties

Example ¶

Side-by-side view with filter (select_multiplesidebyside_5)¶

'select_multiplesidebyside_5' => [
    'label' => 'select_multiplesidebyside_5 multiSelectFilterItems',
    'config' => [
        'type' => 'select',
        'renderType' => 'selectMultipleSideBySide',
        'items' => [
            ['foo 1', 1],
            ['foo 2', 2],
            ['foo 3', 3],
            ['bar', 4],
        ],
        'multiSelectFilterItems' => [
            ['', ''],
            ['foo', 'foo'],
            ['bar', 'bar'],
        ],
    ],
],

Properties ¶

allowNonIdValues ¶

Datatype

boolean

Scope

Proc.

Description

Only useful if foreign_table is enabled.

If set, then values which are not integer ids will be allowed. May be needed if you use itemsProcFunc or just enter additional items in the items array to produce some string-value elements for the list.

Notice: If you mix non-database relations with database relations like this, DO NOT use integers for values and DO NOT use "_" (underscore) in values either! Will not work if you also use "MM" relations!

authMode ¶

Datatype

string (keyword)

Scope

Display / Proc.

Description

Authorization mode for the selector box. Keywords are:

explicitAllow: All static values from the "items" array of the selector box will be added to a matrix in the backend user configuration where a value must be explicitlyselected if a user (other than admin) is allowed to use it!)
explicitDeny: All static values from the "items" array of the selector box will be added to a matrix in the backend user configuration where a value must be explicitlyselected if a user should be denied access.
individual: State is individually set for each item in the selector box. This is done by the keywords " EXPL_ALLOW " and " EXPL_DENY " entered at the 5. position in the item array (see "items" configuration). Items without any of these keywords can be selected as usual without any access restrictions applied.

Note

The authentication modes will work only with values that are statically present in the "items" configuration. Any values added from foreign tables, file folder or by user processing will not be configurable and the evaluation of such values is not guaranteed for!

maxitems > 1

"authMode" works also for selector boxes with maxitems > 1. In this case the list of values is traversed and each value is evaluated. Any disallowed values will be removed.

If all submitted values turns out to be removed the result will be that the field is not written – basically leaving the old value. For maxitems <=1 (single value) this means that a non-allowed value is just not written. For multiple values (maxitems >1) it depends on whether any elements are left in the list after evaluation of each value.

authMode_enforce ¶

Datatype

string (keyword)

Scope

Display / Proc.

Description

Various additional enforcing options for authMode, keywords:

strict: If set, then permission to edit the record will be granted only if the "authMode" evaluates OK. The default is that a record having an authMode configured field with a "non-allowed" value can be edited – just the value of the authMode field cannot be set to a value that is not allowed. Notice: This works only when maxitems <=1 (and no MM relations) since the "raw" value in the record is all that is evaluated!

autoSizeMax ¶

Datatype: integer
Scope: Display
Description: If set, then the height of element listing selector box will automatically be adjusted to the number of selected elements, however never less than "size" and never larger than the integer value of "autoSizeMax" itself (takes precedence over "size"). So "autoSizeMax" is the maximum height the selector can ever reach.

behaviour ¶

Datatype: array
Scope: Proc.
Description: The behaviour array contains various sub properties to specify processing options like localization overlay behaviour and children behaviour for relation types. Available properties vary by type and renderType combination.

behaviour => allowLanguageSynchronization¶

Datatype

boolean

Scope

Proc.

Description

Allows an editor to select in a localized record whether the value is copied over from default or source language record, or if the field has an own value in the localization. If set to true and if the table supports localization and if a localized record is edited, this setting enables FieldWizard LocalizationStateSelector: Two or three radio buttons shown below the field input. The state of this is stored in a json encoded array in the database table called l10n_state. It tells the DataHandler which fields of the localization records should be kept in sync if the underlying default or source record changes.

Example:

'aField' => [
   'config' => [
      'type' = 'sometype',
      'behaviour' => [
         'allowLanguageSynchronization' => true
      ]
   ]
]

Default

false

default ¶

Datatype: string
Scope: Display / Proc.
Description: Default value set if a new record is created. If empty, the first element in the items array is selected.

disableNoMatchingValueElement ¶

Datatype: boolean
Scope: Display
Description: If set, then no element is inserted if the current value does not match any of the existing elements. A corresponding options is also found in Page TSconfig.

dontRemapTablesOnCopy ¶

Datatype

string (list of tables)

Scope

Proc.

Description

If used with type='group', this is only considered with internal_type='db'

A list of tables which should not be remapped to the new element uids if the field holds elements that are copied in the session.

exclusiveKeys ¶

Datatype

string (list of)

Scope

Display / Proc.

Description

List of keys that exclude any other keys in a select box where multiple items could be selected.

"Show at any login" of "fe_groups" (tables "pages" and "tt_content") is an example where such a configuration is used.

fieldControl ¶

Datatype: array
Scope: Display
Description: Show action buttons next to the element. This is used in various type's to add control buttons right next to the main element. They can open popups, switch the entire view and other things. All must provide a "button" icon to click on, see FormEngine docs for more details. See type=group for examples.

addRecord¶

Datatype

array

Scope

fieldControl

Description

Control button to directly add a related record. Leaves the current view and opens a new form to add a new record. On 'Save and close', the record is directly selected as referenced element in the type='group' field. If multiple tables are allowed, the first table from the allowed list is selected, if not specific table option is given.

Note

The add record control is disabled by default, enable it if needed. It is shown below the edit popup control if not changed by below or after settings.

Options:

pid (string)

pid of the new record. Can be an hard pid setting, or one of these markers, see select foreign_table_where. Falls back to "current pid" if not set, forces pid=0 if records of this table are only allowed on root level.

###CURRENT_PID###

###THIS_UID###

###SITEROOT###

table (string): Add a record to this table, falls back to first table from allowed list if not set for type='group' fields and to foreign_table for type='select' fields.
title (string or LLL reference): Allows to set a different 'title' attribute to the popup icon, defaults to LLL:EXT:lang/Resources/Private/Language/locallang_core.xlf:labels.createNew
setValue (string, keyword): Can be one of 'set', 'prepend' or 'append'. With 'set' the given selection is substituted with the new record, 'prepend' adds the new record on top of the list, 'append' adds it at the bottom. Default: 'append'.

Add a new record icon¶

Add a new record view¶

editPopup¶

Datatype

array

Scope

fieldControl

Description

The edit popup field control gives a shortcut to edit referenced elements directly a popup. When a record is selected and the edit button is clicked, that record opens in a new window for modification.

Note

The edit popup control is pre-configured, but disabled by default. Enable it if you need it, the button is by default shown below element browser and insert clipboard.

Options:

title (string or LLL reference): Allows to set a different 'title' attribute to the popup icon, defaults to LLL:EXT:lang/Resources/Private/Language/locallang_core.xlf:labels.edit
windowOpenParameters (string): Allows to set a different size of the popup, defaults to height=800,width=600,status=0,menubar=0,scrollbars=1.

Edit a related record directly thanks to the Edit wizard¶

Example

'myField' => [
    'type' => 'group',
    // ...
    'config' => [
        'fieldControl' => [
            'editPopup' => [
                'disabled' => false,
                'options' => [
                    'title' => 'Edit a selected record!',
                ],
            ],
        ],
    ],
],

listModule¶

Datatype

array

Scope

fieldControl

Description

The list module control button opens the Web > List module for only one table and allows the user to manipulate stuff there.

Note

The list module control is disabled by default, enable it if needed. It is shown below the add record control if not changed by below or after settings.

Options:

pid (string)

pid of the new record. Can be an hard pid setting, or one of these markers, see select foreign_table_where. Falls back to "current pid" if not set, forces pid=0 if records of this table are only allowed on root level.

###CURRENT_PID###
###THIS_UID###
###SITEROOT###

table (string)

List records of this table only, falls back to first table from allowed list if not set for type='group' fields and to foreign_table for type='select' fields.

title (string or LLL reference)

Allows to set a different 'title' attribute to the popup icon, defaults to LLL:EXT:lang/Resources/Private/Language/locallang_core.xlf:labels.list

fieldInformation ¶

Datatype: array
Scope: Display
Description: Show information between an element label and the main element input area. Configuration works identical to the "fieldWizard" property, no default configuration in the core exists (yet). In contrast to "fieldWizard", HTML returned by fieldInformation is limited, see FormEngine docs for more details.

fieldWizard ¶

Datatype

array

Scope

Display

Description

Specifies wizards rendered below the main input area of an element. Single type / renderType elements can register default wizards which are merged with this property.

As example, type='check' comes with this default wizards configuration:

protected $defaultFieldWizard = [
    'localizationStateSelector' => [
        'renderType' => 'localizationStateSelector',
    ],
    'otherLanguageContent' => [
        'renderType' => 'otherLanguageContent',
        'after' => [
            'localizationStateSelector'
        ],
    ],
    'defaultLanguageDifferences' => [
        'renderType' => 'defaultLanguageDifferences',
        'after' => [
            'otherLanguageContent',
        ],
    ],
];

This is be merged with the configuration from TCA, if there is any. Below example disables the default localizationStateSelector wizard.

'aField' => [
    'config' => [
        'fieldWizard' => [
            'localizationStateSelector' => [
                'disabled' => true,
            ],
        ],
    ],
],

It is possible to add own wizards by adding them to the TCA of the according field and pointing to a registered renderType, to resort wizards by overriding the before and after keys, to hand over additional options in the optional options array to specific wizards, and to disable single wizards using the disabled key. Developers should have a look at the FormEngine docs for details.

The following fieldWizards are available for this renderType:

fieldWizard => defaultLanguageDifferences
fieldWizard => localizationStateSelector
fieldWizard => otherLanguageContent

fieldWizard => defaultLanguageDifferences ¶

Datatype

array

Scope

fieldWizard

Description

Show a "diff-view" if the content of the default language record has been changed after the translation overlay has been created. The ['ctrl'] section property transOrigDiffSourceField has to be specified to enable this wizard in a translated record.

This wizard is important for editors who maintain translated records: They can see what has been changed in their localization parent between the last save operation of the overlay.

A field has been changed in default language record¶

fieldWizard => localizationStateSelector ¶

Datatype

array

Scope

fieldWizard

Description

The localization state selector wizard displays two or three radio buttons in localized records saying: "This field has an own value distinct from my default language or source record", "This field has the same value as the default language record" or "This field has the same value as my source record". This wizard is especially useful for the tt_content table. It will only render, if:

The record is a localized record (not default language)
The record is in "translated" (connected), but not in "copy" (free) mode
The table is localization aware using the ['ctrl'] properties languageField, transOrigPointerField. If the optional property translationSource is also set, and if the record is a translation from another localized record, the third radio appears.
The property ['config']['behaviour']['allowLanguageSynchronization'] is set to true

Example localization state selector on a type=input field

Example localization state selector on an type=input field¶

fieldWizard => otherLanguageContent ¶

Datatype

array

Scope

fieldWizard

Description

Show values from the default language record and other localized records if the edited row is a localized record. Often used in tt_content fields. By default, only the value of the default language record is shown, values from further translations can be shown by setting the userTsConfig property additionalPreviewLanguages.

The wizard shows content only for "simple" fields. For instance, it does not work for database relation fields, and if the field is set to readOnly. Additionally, the table has to be language aware by setting up the according fields in ['ctrl'] section.

Header field showing values from two other languages¶

fileFolder ¶

Datatype

string

Scope

Display / Proc.

Description

Specifying a folder from where files are added to the item array.

Specify the folder relative to the \TYPO3\CMS\Core\Core\Environment::getPublicPath(), possibly using the prefix "EXT:" to point to an extension folder.

Files from the folder is selected recursively to the level specified by fileFolder_recursions and only files of the extension defined by fileFolder_extList is selected.

Only the file reference relative to the "fileFolder" is stored.

If the files are images (gif,png,jpg) they will be configured as icons (third parameter in items array).

Example:

'config' => [
    'type' => 'select',
    'renderType' => 'selectSingle',
    'items' => [
        ['', 0],
    ],
    'fileFolder' => 'EXT:cms/tslib/media/flags/',
    'fileFolder_extList' => 'png,jpg,jpeg,gif',
    'fileFolder_recursions' => 0,
    'size' => 1,
    'minitems' => 0,
    'maxitems' => 1,
],

fileFolder_extList ¶

Datatype: string
Scope: Display / Proc.
Description: List of extensions to select. If blank, all files are selected. Specify list in lowercase. Only useful in combination with property fileFolder.

fileFolder_recursions ¶

Datatype: integer
Scope: Display / Proc.
Description: Depth of directory recursions. Default is 99. Specify in range from 0-99. 0 (zero) means no recursion into subdirectories. Only useful in combination with property fileFolder.

foreign_table ¶

Datatype: string (table name)
Scope: Proc. / Display
Description: The item-array will be filled with records from the table defined here. The table must be configured in $GLOBALS['TCA'].

foreign_table_prefix ¶

Datatype: string or LLL reference
Scope: Display
Description: Label prefix to the title of the records from the foreign-table.

foreign_table_where ¶

Datatype

string (SQL WHERE)

Scope

Proc. / Display

Description

The items from foreign_table are selected with this WHERE-clause.

The table is joined with the "pages"-table and items are selected only from pages where the user has read access! (Not checking DB mount limitations!)

Example:

AND {#tx_my_foreign_table}.{#pid} = 0 ORDER BY tx_my_foreign_table.sorting

Field quoting

The above example uses the special field quoting syntax {#...} around identifiers of the QueryHelper to be as DBAL compatible as possible. Note that the ORDER BY is NOT quoted since that is parsed out anyway and always receives proper quoting.

Markers:

It is possible to use markers in the WHERE clause:

###REC_FIELD_[field name]### Any field of the current record.

Note

The field name part of the marker is not in upper case letters. It must match the exact case used in the database.
###THIS_UID### Current element uid (zero if new).
###CURRENT_PID### The current page id (pid of the record).
###SITEROOT###
###PAGE_TSCONFIG_ID### A value you can set from Page TSconfig dynamically.
###PAGE_TSCONFIG_IDLIST### A value you can set from Page TSconfig dynamically.
###PAGE_TSCONFIG_STR### A value you can set from Page TSconfig dynamically.

The markers are preprocessed so that the value of CURRENT_PID and PAGE_TSCONFIG_ID are always integers (default is zero), PAGE_TSCONFIG_IDLIST will always be a comma-separated list of integers (default is zero) and PAGE_TSCONFIG_STR will be addslashes'ed before substitution (default is blank string).

More information about markers set by Page TSconfig can be found in the TSconfig reference.

itemGroups ¶

Datatype

array

Scope

Display / Proc.

Description

Contains an array of key-value pairs. The key contains the id of the item group, the value contains the label of the item group or its language reference.

Only groups containing items will be displayed. In the select field first all items with no group defined are listed then the item groups in the order of their definition, each group with the corresponding items.

In the renderType selectSingle item groups are rendered as <optgroup>.

In the renderType selectCheckbox the groups are displayed as accordions containing the check boxes.

In other renderTypes a non selectable item with the group name gets displayed.

Example:

A configuration could look like this:

'select_single_16' => [
   'exclude' => 1,
   'label' => 'select_single_16',
   'description' => 'itemGroups',
   'config' => [
      'type' => 'select',
      'renderType' => 'selectSingle',
      'items' => [
         '0' => [
            '0' => 'item 1',
            '1' => 1,
            '2' => '',
            '3' => 'group1',
         ],
         '1' => [
            '0' => 'item 2',
            '1' => 2,
            '2' => '',
            '3' => 'group1',
         ],
         '2' => [
            '0' => 'item 3',
            '1' => 3,
            '2' => '',
            '3' => 'group3',
         ],
         '3' => [
            '0' => 'item 4',
            '1' => 3,
         ],
      ],
      'itemGroups' => [
         'group1' => 'Group 1 with items',
         'group2' => 'Group 2 with no items',
         'group3' => 'Group 3 with items',
      ],
   ],
],
// Example from extension "styleguide", table "tx_styleguide_elements_select"

A more complex example could be this (includes icons):

'select_checkbox_7' => [
   'exclude' => 1,
   'label' => 'select_checkbox_7',
   'description' => 'itemGroups',
   'config' => [
      'type' => 'select',
      'renderType' => 'selectCheckBox',
      'items' => [
         '0' => [
            '0' => 'foo 1',
            '1' => 1,
            '2' => '',
            '3' => 'group1',
         ],
         '1' => [
            '0' => 'foo 2',
            '1' => 2,
            '2' => 'EXT:styleguide/Resources/Public/Icons/tx_styleguide.svg',
            '3' => 'group1',
         ],
         '2' => [
            '0' => 'foo 3',
            '1' => 3,
            '2' => 'EXT:styleguide/Resources/Public/Icons/tx_styleguide.svg',
         ],
         '3' => [
            '0' => 'foo 4',
            '1' => 4,
         ],
         '4' => [
            '0' => 'foo 5',
            '1' => 1,
            '2' => '',
            '3' => 'group3',
         ],
      ],
      'itemGroups' => [
         'group1' => 'Group 1 with items',
         'group2' => 'Group 2 with no items',
         'group3' => 'Group 3 with items',
      ],
   ],
],
// Example from extension "styleguide", table "tx_styleguide_elements_select"

API Methods

Adding custom select item groups

Registration of a select item group takes place in Configuration/TCA/tx_mytable.php for new TCA tables, and in Configuration/TCA/Overrides/a_random_core_table.php for modifying an existing TCA definition.

For existing select fields additional item groups can be added via the api method ExtensionManagementUtility::addTcaSelectItemGroup.

ExtensionManagementUtility::addTcaSelectItemGroup(
    'tt_content',
    'CType',
    'sliders',
    'LLL:EXT:my_slider_mixtape/Resources/Private/Language/locallang_tca.xlf:tt_content.group.sliders',
    'after:lists'
);

When adding a new select field, itemGroups should be added directly in the original TCA definition without using the API method. Use the API within TCA/Configuration/Overrides/ files to extend an existing TCA select field with grouping.

Attaching select items to item groups

Using the API method ExtensionManagementUtility::addTcaSelectItem a a fourth parameter in the array can be used to specify the id of the item group.

ExtensionManagementUtility::addTcaSelectItem(
    'tt_content',
    'CType',
    [
        'LLL:EXT:my_slider_mixtape/Resources/Private/Locallang/locallang_tca.xlf:tt_content.CType.slickslider',
        'slickslider',
        'EXT:my_slider_mixtape/Resources/Public/Icons/slickslider.png',
        'sliders'
    ]
);

History

With the introduction of the itemGroups the TCA column type select has a clean API to group items for dropdowns in FormEngine. This was previously handled via placeholder --div-- items, which then rendered as <optgroup> HTML elements in a dropdown.

In larger installations or TYPO3 instances with lots of extensions, Plugins (tt_content.list_type), Content Types (tt_content.CType) or custom Page Types (pages.doktype) drop down lists could grow large and adding item groups caused tedious work for developers or integrators. Grouping can now be configured on a per-item basis. Custom groups can be added via an API or when defining TCA for a new table.

sortItems ¶

New in version 10.4: sortItems allows sorting of static select items by their values or labels.

type: array
Scope: Display
RenderType: all

The property sortItems allows sorting of static select items by their values or labels.

Built-in orderings are to sort items by their labels or values. It is also possible to define custom sorting via PHP code.

When using grouped select fields with itemGroups, sorting happens on a per-group basis - all items within one group are sorted - as the group ordering is preserved.

Examples

Sort items by label

'columns' => [
    'select_single_18' => [
        'exclude' => 1,
        'label' => 'select_single_18',
        'description' => 'sortItems label asc',
        'config' => [
            'type' => 'select',
            'renderType' => 'selectSingle',
            'items' => [
                [
                    'Plum tree',
                    1,
                ],
                [
                    'Walnut tree',
                    2,
                ],
                [
                    'Apple tree',
                    3,
                ],
                [
                    'Cherry tree',
                    4,
                ],
            ],
            'sortItems' => [
                'label' => 'asc',
            ],
            'size' => 4,
        ],
    ],
]

Sort items by value

'columns' => [
    'select_single_19' => [
        'exclude' => 1,
        'label' => 'select_single_19',
        'description' => 'sortItems value desc',
        'config' => [
            'type' => 'select',
            'renderType' => 'selectSingle',
            'items' => [
                [
                    'Plum tree',
                    1,
                ],
                [
                    'Walnut tree',
                    2,
                ],
                [
                    'Apple tree',
                    3,
                ],
                [
                    'Cherry tree',
                    4,
                ],
            ],
            'sortItems' => [
                'value' => 'desc',
            ],
            'size' => 4,
        ],
    ],
]

Sort items by a custom method

The following custom method sorts the items by their reversed labels:

'columns' => [
    'select_single_20' => [
        'exclude' => 1,
        'label' => 'select_single_20',
        'description' => 'sortItems custom',
        'config' => [
            'type' => 'select',
            'renderType' => 'selectSingle',
            'items' => [
                [
                    'Plum tree',
                    1,
                ],
                [
                    'Walnut tree',
                    2,
                ],
                [
                    'Apple tree',
                    3,
                ],
                [
                    'Cherry tree',
                    4,
                ],
            ],
            'sortItems' => [
                'tx_styleguide' => 'TYPO3\\CMS\\Styleguide\\UserFunctions\\FormEngine\\SelectItemSorter->sortReverseTitles',
            ],
            'size' => 4,
        ],
    ],
]

<?php

declare(strict_types=1);

namespace TYPO3\CMS\Styleguide\UserFunctions\FormEngine;

/**
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

/**
 * A user function to sort ites
 */
class SelectItemSorter
{
    /**
     * Sort items by their reverse titles
     *
     * @param array $items
     */
    public function sortReverseTitles(&$items): void
    {
        @usort(
            $items,
            function ($item1, $item2) {
                return strcasecmp(strrev((string)$item1[0]), strrev((string)$item2[0]));
            }
        );
    }
}

items ¶

Datatype

array

Scope

Display / Proc.

Description

Contains the elements for the selector box unless the property "foreign_table" or "special" has been set in which case automated values are set in addition to any values listed in this array.

Changed in version 10.4: With the introduction of item groups, the former fourth (optional description) and fifth (authMode) entries have been shifted one position up. This needs to be adjusted if upgrading from lower TYPO3 versions.

Each element in this array is in itself an array where:

First value is the item label (string or LLL reference)
Second value is the value of the item
- The special value --div-- was used to insert a non-selectable value that appears as a divider label in the selector box. It is kept for backwards-compatible reasons. Use item groups for custom selects instead.
- Values must not contain "," (comma) and "|" (vertical bar). If you want to use "authMode" you should also refrain from using ":" (colon).
Third value is an optional icon. For custom icons use a path prepended with "EXT:" to refer to an image file found inside an extension or use an registered icon identifier.
Fourth value is the key of the item group.
Fifth value is an optional description text. This is only shown when the list is shown with renderType='selectCheckBox'.
Sixth value is reserved as keyword EXPL_ALLOW or EXPL_DENY. See property authMode / individual for more details.

Example:

A configuration could look like this:

'type' => 'select',
'items' => [
    ['English', ''],
    ['Danish', 'dk'],
    ['German', 'de'],
]

A more complex example could be this (includes icons):

'type' => 'select',
'items' => [
    ['LLL:EXT:cms/locallang_ttc.php:k1', 0, 'EXT:myext/Resources/Public/selicons/k1.gif'],
    ['LLL:EXT:cms/locallang_ttc.php:k2', 1, 'tx-myext-selicons-k2'],
    ['LLL:EXT:cms/locallang_ttc.php:k3', 2, 'tx-myext-selicons-k3'],
]

Note

When having a zero as second value and the field is of type int(10) in the database, make sure to define the default value as well in TCA: 'default' => 0. Otherwise issues may arise e.g. with MySQL strict mode.

itemsProcFunc ¶

Datatype

string (class->method reference)

Scope

Display / Proc.

Description

PHP function which is called to fill / manipulate the array with elements.

[classname]->[methodname]

The function/method will have an array of parameters passed to it, the items-array is passed by reference in the key 'items'. By modifying the array of items, you alter the list of items. A method may throw an exception which will be displayed as a proper error message to the user.

Example:

The configuration for the field category_field of the table tt_content looks like this:

'type' => 'select',
'renderType' => 'selectSingle',
'itemsProcFunc' => 'TYPO3\CMS\Core\Category\CategoryRegistry->getCategoryFieldsForTable',
'itemsProcConfig' => [
    'table' => 'tt_content'
],
'minitems' => 0,
'maxitems' => 1,
'size' => 1

The referenced itemsProcFunc should populate the items by filling $configuration['items']`:

/**
 * Returns a list of category fields for a given table for populating selector "category_field"
 * in tt_content table (called as itemsProcFunc).
 *
 * @param array $configuration Current field configuration
 * @throws \UnexpectedValueException
 * @internal
 */
public function getCategoryFieldsForTable(array &$configuration)
{
    $table = $configuration['config']['itemsProcConfig']['table'] ?? '';
    // Return early if no table is defined
    if (empty($table)) {
        throw new \UnexpectedValueException('No table is given.', 1381823570);
    }
    // Loop on all registries and find entries for the correct table
    foreach ($this->registry as $tableName => $fields) {
        if ($tableName === $table) {
            foreach ($fields as $fieldName => $options) {
                $fieldLabel = $this->getLanguageService()->sL($GLOBALS['TCA'][$tableName]['columns'][$fieldName]['label']);
                $configuration['items'][] = [$fieldLabel, $fieldName];
            }
        }
    }
}

Further examples on different config type's can be found in the extension styleguide.

localizeReferencesAtParentLocalization ¶

Datatype: boolean
Scope: Proc.
Description: Defines whether referenced records should be localized when the current record gets localized. This only applies if references are not stored using MM tables. In addition, when using the type group, foreign_table has to reference the same table in allowed.

maxitems ¶

Datatype: integer > 0
Scope: Maximum number of child items. Defaults to a high value. JavaScript record validation prevents the record from being saved if the limit is not satisfied.

Note

Property maxitems is ignored with type='select' and renderType='selectSingle'.
Description: Display / Proc.

minitems ¶

Datatype: integer > 0
Scope: Display
Description: Minimum number of child items. Defaults to 0. JavaScript record validation prevents the record from being saved if the limit is not satisfied.

MM ¶

Datatype

string (table name)

Scope

Proc.

Description

Means that the relation to the records of foreign_table (or table specified in allowed property in case of the group field) is done with a M-M relation with a third "join" table.

The intermediate table has three columns as a minimum:

uid_local, uid_foreign (Required)

Storing uids of both sides. If done right, this is reflected in the table name - tx_foo_local_foreign_mm

sorting (Required)

Is a required field used for ordering the items.

sorting_foreign

Is required if the relation is bidirectional (see description and example below table)

tablenames

Is used if multiple tables are allowed in the relation.

uid (auto-incremented and PRIMARY KEY)

May be used if you need the "multiple" feature (which allows the same record to be references multiple times in the box. See MM_hasUidField for type='select' and MM_hasUidField for type='group' fields.

further fields

May exist, in particular if MM_match_fields / MM_match_fields is involved in the set up.

Example SQL #1

Most simple MM table

CREATE TABLE tx_testmmrelations_one_rel_mm (
    uid_local int(11) DEFAULT '0' NOT NULL,
    uid_foreign int(11) DEFAULT '0' NOT NULL,
    sorting int(11) DEFAULT '0' NOT NULL,

    KEY uid_local (uid_local),
    KEY uid_foreign (uid_foreign)
);

Example SQL #2

Advanced with uid field, "ident" used with MM_match_fields and "sorting_foreign" for bidirectional MM relations:

CREATE TABLE tx_testmmrelations_two_rel_mm (
    uid int(11) NOT NULL auto_increment,
    uid_local int(11) DEFAULT '0' NOT NULL,
    uid_foreign int(11) DEFAULT '0' NOT NULL,
    tablenames varchar(30) DEFAULT '' NOT NULL,
    sorting int(11) DEFAULT '0' NOT NULL,
    sorting_foreign int(11) DEFAULT '0' NOT NULL,
    ident varchar(30) DEFAULT '' NOT NULL,

    KEY uid_local (uid_local),
    KEY uid_foreign (uid_foreign),
    PRIMARY KEY (uid)
);

Value of field

The field name of the config is not used for data-storage anymore but rather it's set to the number of records in the relation on each update, so the field should be an integer.

MM relations and flexforms

MM relations has been tested to work with flexforms if not in a repeated element in a section.

Note

Using MM relations you can ONLY store real relations for foreign tables in the list - no additional string values or non-record values.

MM_hasUidField ¶

Datatype: boolean
Scope: Proc.
Description: If the "multiple" feature is used with MM relations you MUST set this value to true and include a UID field! Otherwise sorting and removing relations will be buggy.

MM_insert_fields ¶

Datatype: array
Scope: Proc.
Description: Array of field=>value pairs to insert when writing new MM relations.

MM_match_fields ¶

Datatype: array
Scope: Display / Proc.
Description: Array of field=>value pairs to both insert and match against when writing/reading MM relations.

MM_opposite_field ¶

Datatype

string (field name)

Scope

Proc.

Description

If you want to make a MM relation editable from the foreign side (bidirectional) of the relation as well, you need to set MM_opposite_field on the foreign side to the field name on the local side.

E.g. if the field "companies.employees" is your local side and you want to make the same relation editable from the foreign side of the relation in a field called persons.employers, you would need to set the MM_opposite_field value of the TCA configuration of the persons.employers field to the string "employees".

Note

Bidirectional references only get registered once on the native side in "sys_refindex".

MM_oppositeUsage ¶

Datatype

array

Scope

Proc.

Description

In a MM bidirectional relation using select match fields / group match fields the opposite side needs to know about the match fields for certain operations (for example, when a copy is created in a workspace) so that relations are carried over with the correct information.

MM_oppositeUsage is an array which references whichfields contain the references to the opposite side, so that they can be queried for match field configuration.

This is used by the Core for system categories. Whenever a table is registered as being categorizable, an entry in MM_oppositeUsage is created for the "sys_category" table.

Example

With "pages", "tt_content" and "sys_file_metadata" all registered as categorizable (using the default name of "categories" for the relations field) plus extension "examples" installed, the TCA for "sys_category" contains the following definition once fully assembled:

$GLOBALS['TCA']['sys_category']['columns']['items']['config']['MM_oppositeUsage'] = [
    'pages' => ['tx_examples_cats', 'categories'],
    'sys_file_metadata' => ['categories'],
    'tt_content' => ['categories'],
];

MM_table_where ¶

Datatype

string (SQL WHERE)

Scope

Proc.

Description

Additional where clause used when reading MM relations.

Example:

{#uid_local} = ###THIS_UID###

The above example uses the special field quoting syntax {#...} around identifiers of the QueryHelper to be as DBAL compatible as possible.

multiple ¶

Datatype

boolean

Scope

Display / Proc.

Description

Allows the same item more than once in a list.

If used with bidirectional MM relations it must be set for both the native and foreign field configuration. Also, with MM relations in general you must use a UID field in the join table, see description for "MM".

multiSelectFilterItems ¶

Datatype

array

Scope

Display

Description

Contains predefined elements for the filter field. On selecting an item, the list of available items gets automatically filtered.

Each element in this array is in itself an array where:

First value is the filter value of the item .
Second value is the item label (string or LLL reference)

Example configuration:

'related_content' => [
    'label' => 'LLL:EXT:examples/Resources/Private/Language/locallang_db.xlf:tx_examples_haiku.related_content',
    'config' => [
        'type' => 'select',
        'renderType' => 'selectMultipleSideBySide',
        'foreign_table' => 'tt_content',
        'foreign_table_where' => 'ORDER BY header ASC',
        'size' => 5,
        'minitems' => 0,
        'multiSelectFilterItems' => [
            [
                'image',
                'LLL:EXT:examples/Resources/Private/Language/locallang_db.xlf:tx_examples_haiku.related_content.image'
            ],
            [
                'typo3',
                'LLL:EXT:examples/Resources/Private/Language/locallang_db.xlf:tx_examples_haiku.related_content.typo3'
            ],
        ],
    ],
],

Filtering available items with both predefined keywords and free input¶

readOnly ¶

Datatype: boolean
Scope: Display
Description: Renders the field in a way that the user can see the values but cannot edit them. The rendering is as similar as possible to the normal rendering but may differ in layout and size.

Warning

This property affects only the display. It is still possible to write to those fields when using the DataHandler.

size ¶

Datatype

integer

Scope

Display

Description

Height of the box in FormEngine.

With type='select' and renderType='selectSingle', the default is 1, but if set to a number greater than 1, the select drop down will be displayed as box where only one item can be selected.

With type='select' and renderType='selectSingleBox', this value should not be set to a number smaller than 2.

With type='group', the "box" collapses to a single element input and should then be combined with a maxitems=1, the default is 5.

special ¶

Datatype

string (keyword)

Scope

Display / Proc.

Description

This configures the selector box to fetch content from some predefined internal source. These options are used for backend user management and pretty worthless for most other purposes. Keywords:

tables: The list of TCA tables is added to the selector (excluding "adminOnly" tables).
pagetypes: All "doktype"-values for the "pages" table are added.
exclude: The list of "excludeFields" as found in $GLOBALS['TCA'] is added.
modListGroup: Module-lists added for groups.
modListUser: Module-lists added for users.
explicitValues: List values that require explicit permissions to be allowed or denied, see authMode.
languages: List system languages ("sys_language" records from page tree root + Default language)
custom: Custom values set by backend modules (see TYPO3_CONF_VARS[BE][customPermOptions])