php - Configuring authManager using DbManager in yii2-app-base -

i'm going through security-authorization tutorial configure authmanager using dbmanager.

after declaring below code in web.php

<?php  $params = require(__dir__ . '/params.php');  $config = [     'id' => 'basic',     'basepath' => dirname(__dir__),     'bootstrap' => ['log'],     'components' => [     'urlmanager' => [       'showscriptname' => false,       'enableprettyurl' => true     ],      'authmanager' => [             'class' => 'yii\rbac\dbmanager',         ],         'request' => [             // !!! insert secret key in following (if empty) - required cookie validation             'cookievalidationkey' => 'tyxyeisqgn9qn_baai6jrv4a6ny54nrq',         ],         'cache' => [             'class' => 'yii\caching\filecache',         ],         'user' => [             'identityclass' => 'app\models\user',             'enableautologin' => true,         ],         'errorhandler' => [             'erroraction' => 'site/error',         ],         'mailer' => [             'class' => 'yii\swiftmailer\mailer',             // send mails file default. have set             // 'usefiletransport' false , configure transport             // mailer send real emails.         'viewpath' => '@backend/mail',             'usefiletransport' => true,         'transport' => [             'class' => 'swift_smtptransport',             'host' => 'localhost',             'username' => 'root',             'password' => '',             'port' => '8080',             'encryption' => 'tls',                         ],         ],         'log' => [             'tracelevel' => yii_debug ? 3 : 0,             'targets' => [                 [                     'class' => 'yii\log\filetarget',                     'levels' => ['error', 'warning'],                 ],             ],         ],         'db' => require(__dir__ . '/db.php'),     ],     'params' => $params, ];  if (yii_env_dev) {     // configuration adjustments 'dev' environment     $config['bootstrap'][] = 'debug';     $config['modules']['debug'] = [         'class' => 'yii\debug\module',     ];      $config['bootstrap'][] = 'gii';     $config['modules']['gii'] = [         'class' => 'yii\gii\module',     ]; }  return $config; 

and, code in console.php

    <?php  yii::setalias('@tests', dirname(__dir__) . '/tests');  $params = require(__dir__ . '/params.php'); $db = require(__dir__ . '/db.php');  return [     'id' => 'basic-console',     'basepath' => dirname(__dir__),     'bootstrap' => ['log', 'gii'],     'controllernamespace' => 'app\commands',     'modules' => [         'gii' => 'yii\gii\module',     ],     'components' => [     'authmanager' => [             'class' => 'yii\rbac\dbmanager',         ],         'cache' => [             'class' => 'yii\caching\filecache',         ],         'log' => [             'targets' => [                 [                     'class' => 'yii\log\filetarget',                     'levels' => ['error', 'warning'],                 ],             ],         ],         'db' => $db,     ],     'params' => $params, ]; 

config/db.php

<?php  return [     'class' => 'yii\db\connection',     'dsn' => 'mysql:host=localhost;dbname=danishyii',     'username' => 'root',     'password' => '',     'charset' => 'utf8', ]; 

i typed ./yii migrate --migrationpath=vendor/yiisoft/yii2/rbac/migrations in terminal. command got component not getting loaded -stack overflow

i got error in terminal

exception 'yii\db\exception' message 'sqlstate[hy000] [2002] can't connect local mysql server through socket '/var/run/mysqld/mysqld.sock' (2)'

i'm new yii. please don't mind if silly question. please me rectify problem.

check if in

console/config/main.php  

you have proper configuration db access sample yii2-app-advanced template

'components' => [     'db' => [         'class' => 'yii\db\connection',         'dsn' => 'mysql:host=your_hostname;dbname=your_dbname',         'username' => 'your_username',         'password' => 'your_password',         'charset' => 'utf8',         'enableschemacache' => true,                 ], 

for basic template

be sure have in basic/console/config.php reference db in component secion this

return [      .......     'components' => [          ......     'db' => require(__dir__ . '/db.php'),     ],       ...... ]; 

and in basci/config/db.php db config

    return [         'class' => 'yii\db\connection',         'dsn' => 'mysql:host=your_hostname;dbname=your_dbname',         'username' => 'your_username',         'password' => 'your_password',         'charset' => 'utf8',     ];