Initial commit，修正

vendor/mdmsoft/yii2-admin/models/searchs/Assignment.php

@@ -0,0 +1,64 @@
+<?php
+
+namespace mdm\admin\models\searchs;
+
+use Yii;
+use yii\base\Model;
+use yii\data\ActiveDataProvider;
+
+/**
+ * AssignmentSearch represents the model behind the search form about Assignment.
+ * 
+ * @author Misbahul D Munir <misbahuldmunir@gmail.com>
+ * @since 1.0
+ */
+class Assignment extends Model
+{
+    public $id;
+    public $username;
+
+    /**
+     * @inheritdoc
+     */
+    public function rules()
+    {
+        return [
+            [['id', 'username'], 'safe'],
+        ];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function attributeLabels()
+    {
+        return [
+            'id' => Yii::t('rbac-admin', 'ID'),
+            'username' => Yii::t('rbac-admin', 'Username'),
+            'name' => Yii::t('rbac-admin', 'Name'),
+        ];
+    }
+
+    /**
+     * Create data provider for Assignment model.
+     * @param  array                        $params
+     * @param  \yii\db\ActiveRecord         $class
+     * @param  string                       $usernameField
+     * @return \yii\data\ActiveDataProvider
+     */
+    public function search($params, $class, $usernameField)
+    {
+        $query = $class::find();
+        $dataProvider = new ActiveDataProvider([
+            'query' => $query,
+        ]);
+
+        if (!($this->load($params) && $this->validate())) {
+            return $dataProvider;
+        }
+
+        $query->andFilterWhere(['like', $usernameField, $this->username]);
+
+        return $dataProvider;
+    }
+}