yii2/bootstrap4/ActiveForm error

Yii 2.0
1

I’m having problem when I use the bootstrap4 activeform.
I am receiving this error

Undefined class constant ‘self::VALIDATION_STATE_ON_INPUT’

Kindly help guys. Thank you.

2

Would you please post versions of Yii 2 and Bootstrap4 package? Also a full stacktrace of the error would help.

3

Actually there is no need in stacktrace because error source is quite obvious. The constant is not defined.

$ grep -IR VALIDATION_STATE_ON_INPUT vendor/
vendor/yiisoft/yii2-bootstrap4/src/ActiveForm.php:    public $validationStateOn =     self::VALIDATION_STATE_ON_INPUT;
vendor/yiisoft/yii2-bootstrap4/src/ActiveField.php:                if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {

composer.json content:

{
    "name": "yiisoft/yii2-app-advanced",
    "description": "Yii 2 Advanced Project Template",
    "keywords": ["yii2", "framework", "advanced", "project template"],
    "homepage": "http://www.yiiframework.com/",
    "type": "project",
    "license": "BSD-3-Clause",
    "support": {
        "issues": "https://github.com/yiisoft/yii2/issues?state=open",
        "forum": "http://www.yiiframework.com/forum/",
        "wiki": "http://www.yiiframework.com/wiki/",
        "irc": "irc://irc.freenode.net/yii",
        "source": "https://github.com/yiisoft/yii2"
    },
    "minimum-stability": "stable",
    "require": {
        "php": ">=5.4.0",
        "yiisoft/yii2": "2.0.13",
        "intranetworks/common": "dev-master",
        "yiisoft/yii2-authclient": "^2.1",
        "yiisoft/yii2-mongodb": "^2.1",
        "sadovojav/yii2-image-cutter": "^1.0",
        "kartik-v/yii2-date-range": "^1.6",
        "kop/yii2-scroll-pager": "^2.5",
        "kartik-v/yii2-tree-manager": "@dev",
        "insolita/yii2-migration-generator": "~2.3",
        "kartik-v/yii2-widgets": "^3.4",
        "kossmoss/yii2-postgresql-array-field": "dev-master",
        "yiisoft/yii2-elasticsearch": "^2.0",
        "betsuno/yii2-yandex-money": "^0.1.0",
        "kartik-v/yii2-tabs-x": "1.2.6",
        "kartik-v/yii2-grid": "^3.1",
        "russ666/yii2-buttons-group-input": "dev-master",
        "karnbrockgmbh/yii2-modal-ajax": "^1.0",
        "loveorigami/yii2-modal-ajax": "^2.1",
        "tecnickcom/tcpdf": "dev-master",
        "kartik-v/yii2-checkbox-x": "*",
        "sc0vu/web3.php": "dev-master",
        "kartik-v/yii2-dynagrid": "@dev",
        "2amigos/yii2-ckeditor-widget": "^2.1",
        "devgroup/yii2-jsoneditor": "^1.1",
        "yiisoft/yii2-swiftmailer": "2.0.7",
        "kartik-v/yii2-builder": "^1.6",
        "kartik-v/yii2-editable": "^1.7",
        "kartik-v/yii2-nav-x": "*",
        "kartik-v/yii2-dropdown-x": "*",
        "2amigos/yii2-transliterator-helper": "^1.0",
        "himiklab/yii2-recaptcha-widget": "*",
        "aferrandini/phpqrcode": "^1.0",
        "rmrevin/yii2-fontawesome": "^3.0",
        "codemix/yii2-localeurls": "^1.7",
        "yiisoft/yii2-bootstrap4": "^2.0"
    },
    "require-dev": {
        "yiisoft/yii2-debug": "~2.0.0",
        "yiisoft/yii2-gii": "~2.0.0",
        "yiisoft/yii2-faker": "~2.0.0",
        "codeception/base": "^2.2.3",
        "codeception/verify": "~0.3.1"
    },
    "config": {
        "process-timeout": 1800,
        "fxp-asset": {
            "enabled": false
        },
        "secure-http": false
    },
    "repositories": [
        {
            "type": "composer",
            "url": "https://asset-packagist.org"
        },
        {
            "type": "vcs",
            "url": "git@git.dev.edrid.ru:edrid/common.git"
        }
    ]
}
4

It extends from \yii\widgets\ActiveForm that has such constant:

5

But as you can see there is no constant definition in vendor folder.

6

But it is there and we can see it. Apparently it is you, that don’t have it in the folder. Do you have yii2 folder there?