Magento 2.1 – How to Use UI Component FormElement Select from Multiple Dropdowns

formslisting-componentmagento-2.1uicomponent

I have two drop downs one for Hours and one for Minutes.I have managed to display the drop down for hoursenter image description here

But any one could assist – how do I display a drop-down for minutes,next to hours in th Ui Component form? like the one in the image.enter image description here

<field name="start_date">
    <argument name="data" xsi:type="array">
        <item name="options" xsi:type="object">NameSpace\ModuleName\Model\Xyz\Source\Hours</item>                
        <item name="config" xsi:type="array">
            <item name="label" xsi:type="string" translate="true">Monday Opening Time</item>
            <item name="visible" xsi:type="boolean">true</item>
            <item name="dataType" xsi:type="string">number</item>
            <item name="formElement" xsi:type="string">select</item>
            <item name="source" xsi:type="string">item</item>
            <item name="dataScope" xsi:type="string">start_date</item>
            <item name="sortOrder" xsi:type="number">220</item>
            <item name="validation" xsi:type="array">
                <item name="required-entry" xsi:type="boolean">true</item>
            </item>
        </item>
    </argument>      
</field>

My Model returns the hours values

public function getHours()
{
    $availableOptions = [
        '0' => '00',
        '1' => '01',
        '2' => '02',
        '3' => '03',
        '4' => '04',
        '5' => '05',
        '6' => '06',
        '7' => '07',
        '8' => '08',
        '9' => '09',
        '10' => '10',
        '11' => '11',
        '12' => '12',
        '13' => '13',
        '14' => '14',
        '15' => '15',
        '16' => '16',
        '17' => '17',
        '18' => '18',
        '19' => '19',
        '20' => '20',
        '21' => '21',
        '22' => '22',
        '23' => '23',
    ];
    return $availableOptions;
}

Best Answer

Here's a way to do it by making a custom ui component. It requires the backing field to be a varchar.

Define the ui component in Your_Module/view/base/web/js/form/element/time.js:

define([
    'Magento_Ui/js/form/element/abstract'
], function (AbstractElement) {
    'use strict';

    return AbstractElement.extend({
        defaults: {
            elementTmpl: 'Your_Module/form/time'
        },

        initialize: function () {
            this._super();

            this.hours = '00';
            this.minutes = '00';

            this.observe(['hours', 'minutes']);

            var value = this.value();

            this.hours(value.slice(0,2));
            this.minutes(value.slice(2));
        },

        userChanges: function () {
            this._super();

            this.value(this.hours() + this.minutes());
        },

        hoursOpts: (function () {
            var opts = [];

            for (var i=0; i<24; i++) {
                opts.push({
                    label: i.toString(),
                    value: ('0' + i).slice(-2)
                })
            }

            return opts;
        })(),

        minutesOpts: (function () {
            var opts = [];

            for (var i=0; i<60; i++) {
                opts.push({
                    label: ('0' + i).slice(-2),
                    value: ('0' + i).slice(-2)
                })
            }

            return opts;
        })()
    });
});

and the template, in Your_Module/view/base/web/template/form/time.html:

<select class="admin__control-select"
        data-bind="
        optgroup: hoursOpts,
        optionsValue: 'value',
        optionsText: 'label',
        value: hours,
        event: {change: userChanges}"/>

<select class="admin__control-select"
        data-bind="
        optgroup: minutesOpts,
        optionsValue: 'value',
        optionsText: 'label',
        value: minutes,
        event: {change: userChanges}"/>

Use it in your form xml like this:

<field name="start_date">
        <argument name="data" xsi:type="array">
             <item name="config" xsi:type="array">
                <item name="label" xsi:type="string" translate="true">Monday Opening Time</item>
                <item name="component" xsi:type="string">Your_Module/js/form/element/time</item>
                <item name="visible" xsi:type="boolean">true</item>
                <item name="dataType" xsi:type="string">text</item>
                <item name="formElement" xsi:type="string">input</item>
                <item name="source" xsi:type="string">item</item>
                <item name="dataScope" xsi:type="string">start_date</item>
                <item name="sortOrder" xsi:type="number">220</item>
                <item name="validation" xsi:type="array">
                <item name="required-entry" xsi:type="boolean">true</item>
            </item>
          </item>
        </argument>      
    </field>

The value from the two drop downs is merged to produce a string like '0130' to represent the time 1:30, so your data type needs to be varchar otherwise the leading '0' will be dropped.

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