Class yii\gii\generators\model\Generator

                protected function addInverseRelations($relations)
{
    $db = $this->getDbConnection();
    $relationNames = [];
    $schemaNames = $this->getSchemaNames();
    foreach ($schemaNames as $schemaName) {
        foreach ($db->schema->getTableSchemas($schemaName) as $table) {
            $className = $this->generateClassName($table->fullName);
            foreach ($table->foreignKeys as $refs) {
                $refTable = $refs[0];
                $refTableSchema = $db->getTableSchema($refTable);
                if ($refTableSchema === null) {
                    // Foreign key could point to non-existing table: https://github.com/yiisoft/yii2-gii/issues/34
                    continue;
                }
                unset($refs[0]);
                $fks = array_keys($refs);
                $leftRelationName = $this->generateRelationName($relationNames, $table, $fks[0], false);
                $relationNames[$table->fullName][$leftRelationName] = true;
                $hasMany = $this->isHasManyRelation($table, $fks);
                $rightRelationName = $this->generateRelationName(
                    $relationNames,
                    $refTableSchema,
                    $className,
                    $hasMany
                );
                $relationNames[$refTableSchema->fullName][$rightRelationName] = true;
                $relations[$table->fullName][$leftRelationName][0] =
                    rtrim($relations[$table->fullName][$leftRelationName][0], ';')
                    . "->inverseOf('".lcfirst($rightRelationName)."');";
                $relations[$refTableSchema->fullName][$rightRelationName][0] =
                    rtrim($relations[$refTableSchema->fullName][$rightRelationName][0], ';')
                    . "->inverseOf('".lcfirst($leftRelationName)."');";
            }
        }
    }
    return $relations;
}

            

                public function attributeLabels()
{
    return array_merge(parent::attributeLabels(), [
        'ns' => 'Namespace',
        'db' => 'Database Connection ID',
        'tableName' => 'Table Name',
        'standardizeCapitals' => 'Standardize Capitals',
        'modelClass' => 'Model Class Name',
        'baseClass' => 'Base Class',
        'generateRelations' => 'Generate Relations',
        'generateRelationsFromCurrentSchema' => 'Generate Relations from Current Schema',
        'generateLabelsFromComments' => 'Generate Labels from DB Comments',
        'generateQuery' => 'Generate ActiveQuery',
        'queryNs' => 'ActiveQuery Namespace',
        'queryClass' => 'ActiveQuery Class',
        'queryBaseClass' => 'ActiveQuery Base Class',
        'useSchemaName' => 'Use Schema Name',
    ]);
}

            

                public function autoCompleteData()
{
    $db = $this->getDbConnection();
    if ($db !== null) {
        return [
            'tableName' => function () use ($db) {
                return $db->getSchema()->getTableNames();
            },
        ];
    }
    return [];
}

            

                protected function checkJunctionTable($table)
{
    if (count($table->foreignKeys) < 2) {
        return false;
    }
    $uniqueKeys = [$table->primaryKey];
    try {
        $uniqueKeys = array_merge($uniqueKeys, $this->getDbConnection()->getSchema()->findUniqueIndexes($table));
    } catch (NotSupportedException $e) {
        // ignore
    }
    $result = [];
    // find all foreign key pairs that have all columns in an unique constraint
    $foreignKeys = array_values($table->foreignKeys);
    $foreignKeysCount = count($foreignKeys);
    for ($i = 0; $i < $foreignKeysCount; $i++) {
        $firstColumns = $foreignKeys[$i];
        unset($firstColumns[0]);
        for ($j = $i + 1; $j < $foreignKeysCount; $j++) {
            $secondColumns = $foreignKeys[$j];
            unset($secondColumns[0]);
            $fks = array_merge(array_keys($firstColumns), array_keys($secondColumns));
            foreach ($uniqueKeys as $uniqueKey) {
                if (count(array_diff(array_merge($uniqueKey, $fks), array_intersect($uniqueKey, $fks))) === 0) {
                    // save the foreign key pair
                    $result[] = [$foreignKeys[$i], $foreignKeys[$j]];
                    break;
                }
            }
        }
    }
    return empty($result) ? false : $result;
}

            

                public function generate()
{
    $files = [];
    $relations = $this->generateRelations();
    $db = $this->getDbConnection();
    foreach ($this->getTableNames() as $tableName) {
        // model :
        $modelClassName = $this->generateClassName($tableName);
        $queryClassName = ($this->generateQuery) ? $this->generateQueryClassName($modelClassName) : false;
        $tableSchema = $db->getTableSchema($tableName);
        $params = [
            'tableName' => $tableName,
            'className' => $modelClassName,
            'queryClassName' => $queryClassName,
            'tableSchema' => $tableSchema,
            'properties' => $this->generateProperties($tableSchema),
            'labels' => $this->generateLabels($tableSchema),
            'rules' => $this->generateRules($tableSchema),
            'relations' => isset($relations[$tableName]) ? $relations[$tableName] : [],
        ];
        $files[] = new CodeFile(
            Yii::getAlias('@' . str_replace('\\', '/', $this->ns)) . '/' . $modelClassName . '.php',
            $this->render('model.php', $params)
        );
        // query :
        if ($queryClassName) {
            $params['className'] = $queryClassName;
            $params['modelClassName'] = $modelClassName;
            $files[] = new CodeFile(
                Yii::getAlias('@' . str_replace('\\', '/', $this->queryNs)) . '/' . $queryClassName . '.php',
                $this->render('query.php', $params)
            );
        }
    }
    return $files;
}

            

                protected function generateClassName($tableName, $useSchemaName = null)
{
    if (isset($this->classNames[$tableName])) {
        return $this->classNames[$tableName];
    }
    $schemaName = '';
    $fullTableName = $tableName;
    if (($pos = strrpos($tableName, '.')) !== false) {
        if (($useSchemaName === null && $this->useSchemaName) || $useSchemaName) {
            $schemaName = substr($tableName, 0, $pos) . '_';
        }
        $tableName = substr($tableName, $pos + 1);
    }
    $db = $this->getDbConnection();
    $patterns = [];
    $patterns[] = "/^{$db->tablePrefix}(.*?)$/";
    $patterns[] = "/^(.*?){$db->tablePrefix}$/";
    if (strpos($this->tableName, '*') !== false) {
        $pattern = $this->tableName;
        if (($pos = strrpos($pattern, '.')) !== false) {
            $pattern = substr($pattern, $pos + 1);
        }
        $patterns[] = '/^' . str_replace('*', '(\w+)', $pattern) . '$/';
    }
    $className = $tableName;
    foreach ($patterns as $pattern) {
        if (preg_match($pattern, $tableName, $matches)) {
            $className = $matches[1];
            break;
        }
    }
    if ($this->standardizeCapitals) {
        $schemaName = ctype_upper(preg_replace('/[_-]/', '', $schemaName)) ? strtolower($schemaName) : $schemaName;
        $className = ctype_upper(preg_replace('/[_-]/', '', $className)) ? strtolower($className) : $className;
        return $this->classNames[$fullTableName] = Inflector::camelize(Inflector::camel2words($schemaName.$className));
    } else {
        return $this->classNames[$fullTableName] = Inflector::id2camel($schemaName.$className, '_');
    }
}

            

                public function generateLabels($table)
{
    $labels = [];
    foreach ($table->columns as $column) {
        if ($this->generateLabelsFromComments && !empty($column->comment)) {
            $labels[$column->name] = $column->comment;
        } elseif (!strcasecmp($column->name, 'id')) {
            $labels[$column->name] = 'ID';
        } else {
            $label = Inflector::camel2words($column->name);
            if (!empty($label) && substr_compare($label, ' id', -3, 3, true) === 0) {
                $label = substr($label, 0, -3) . ' ID';
            }
            $labels[$column->name] = $label;
        }
    }
    return $labels;
}

            

                protected function generateProperties($table)
{
    $properties = [];
    foreach ($table->columns as $column) {
        $columnPhpType = $column->phpType;
        if ($columnPhpType === 'integer') {
            $type = 'int';
        } elseif ($columnPhpType === 'boolean') {
            $type = 'bool';
        } else {
            $type = $columnPhpType;
        }
        $properties[$column->name] = [
            'type' => $type,
            'name' => $column->name,
            'comment' => $column->comment,
        ];
    }
    return $properties;
}

            

                protected function generateQueryClassName($modelClassName)
{
    $queryClassName = $this->queryClass;
    if (empty($queryClassName) || strpos($this->tableName, '*') !== false) {
        $queryClassName = $modelClassName . 'Query';
    }
    return $queryClassName;
}

            

                protected function generateRelationLink($refs)
{
    $pairs = [];
    foreach ($refs as $a => $b) {
        $pairs[] = "'$a' => '$b'";
    }
    return '[' . implode(', ', $pairs) . ']';
}

            

                protected function generateRelationName($relations, $table, $key, $multiple)
{
    static $baseModel;
    /* @var $baseModel \yii\db\ActiveRecord */
    if ($baseModel === null) {
        $baseClass = $this->baseClass;
        $baseClassReflector = new \ReflectionClass($baseClass);
        if ($baseClassReflector->isAbstract()) {
            $baseClassWrapper =
                'namespace ' . __NAMESPACE__ . ';'.
                'class GiiBaseClassWrapper extends \\' . $baseClass . ' {' .
                    'public static function tableName(){' .
                        'return "' . addslashes($table->fullName) . '";' .
                    '}' .
                '};' .
                'return new GiiBaseClassWrapper();';
            $baseModel = eval($baseClassWrapper);
        } else {
            $baseModel = new $baseClass();
        }
        $baseModel->setAttributes([]);
    }
    if (!empty($key) && strcasecmp($key, 'id')) {
        if (substr_compare($key, 'id', -2, 2, true) === 0) {
            $key = rtrim(substr($key, 0, -2), '_');
        } elseif (substr_compare($key, 'id', 0, 2, true) === 0) {
            $key = ltrim(substr($key, 2, strlen($key)), '_');
        }
    }
    if ($multiple) {
        $key = Inflector::pluralize($key);
    }
    $name = $rawName = Inflector::id2camel($key, '_');
    $i = 0;
    while ($baseModel->hasProperty(lcfirst($name))) {
        $name = $rawName . ($i++);
    }
    while (isset($table->columns[lcfirst($name)])) {
        $name = $rawName . ($i++);
    }
    while (isset($relations[$table->fullName][$name])) {
        $name = $rawName . ($i++);
    }
    return $name;
}

            

                protected function generateRelations()
{
    if ($this->generateRelations === self::RELATIONS_NONE) {
        return [];
    }
    $db = $this->getDbConnection();
    $relations = [];
    $schemaNames = $this->getSchemaNames();
    foreach ($schemaNames as $schemaName) {
        foreach ($db->getSchema()->getTableSchemas($schemaName) as $table) {
            $className = $this->generateClassName($table->fullName);
            foreach ($table->foreignKeys as $refs) {
                $refTable = $refs[0];
                $refTableSchema = $db->getTableSchema($refTable);
                if ($refTableSchema === null) {
                    // Foreign key could point to non-existing table: https://github.com/yiisoft/yii2-gii/issues/34
                    continue;
                }
                unset($refs[0]);
                $fks = array_keys($refs);
                $refClassName = $this->generateClassName($refTable);
                // Add relation for this table
                $link = $this->generateRelationLink(array_flip($refs));
                $relationName = $this->generateRelationName($relations, $table, $fks[0], false);
                $relations[$table->fullName][$relationName] = [
                    "return \$this->hasOne($refClassName::className(), $link);",
                    $refClassName,
                    false,
                ];
                // Add relation for the referenced table
                $hasMany = $this->isHasManyRelation($table, $fks);
                $link = $this->generateRelationLink($refs);
                $relationName = $this->generateRelationName($relations, $refTableSchema, $className, $hasMany);
                $relations[$refTableSchema->fullName][$relationName] = [
                    "return \$this->" . ($hasMany ? 'hasMany' : 'hasOne') . "($className::className(), $link);",
                    $className,
                    $hasMany,
                ];
            }
            if (($junctionFks = $this->checkJunctionTable($table)) === false) {
                continue;
            }
            $relations = $this->generateManyManyRelations($table, $junctionFks, $relations);
        }
    }
    if ($this->generateRelations === self::RELATIONS_ALL_INVERSE) {
        return $this->addInverseRelations($relations);
    }
    return $relations;
}

            

                public function generateRules($table)
{
    $types = [];
    $lengths = [];
    foreach ($table->columns as $column) {
        if ($column->autoIncrement) {
            continue;
        }
        if (!$column->allowNull && $column->defaultValue === null) {
            $types['required'][] = $column->name;
        }
        switch ($column->type) {
            case Schema::TYPE_SMALLINT:
            case Schema::TYPE_INTEGER:
            case Schema::TYPE_BIGINT:
            case Schema::TYPE_TINYINT:
                $types['integer'][] = $column->name;
                break;
            case Schema::TYPE_BOOLEAN:
                $types['boolean'][] = $column->name;
                break;
            case Schema::TYPE_FLOAT:
            case Schema::TYPE_DOUBLE:
            case Schema::TYPE_DECIMAL:
            case Schema::TYPE_MONEY:
                $types['number'][] = $column->name;
                break;
            case Schema::TYPE_DATE:
            case Schema::TYPE_TIME:
            case Schema::TYPE_DATETIME:
            case Schema::TYPE_TIMESTAMP:
            case Schema::TYPE_JSON:
                $types['safe'][] = $column->name;
                break;
            default: // strings
                if ($column->size > 0) {
                    $lengths[$column->size][] = $column->name;
                } else {
                    $types['string'][] = $column->name;
                }
        }
    }
    $rules = [];
    $driverName = $this->getDbDriverName();
    foreach ($types as $type => $columns) {
        if ($driverName === 'pgsql' && $type === 'integer') {
            $rules[] = "[['" . implode("', '", $columns) . "'], 'default', 'value' => null]";
        }
        $rules[] = "[['" . implode("', '", $columns) . "'], '$type']";
    }
    foreach ($lengths as $length => $columns) {
        $rules[] = "[['" . implode("', '", $columns) . "'], 'string', 'max' => $length]";
    }
    $db = $this->getDbConnection();
    // Unique indexes rules
    try {
        $uniqueIndexes = array_merge($db->getSchema()->findUniqueIndexes($table), [$table->primaryKey]);
        $uniqueIndexes = array_unique($uniqueIndexes, SORT_REGULAR);
        foreach ($uniqueIndexes as $uniqueColumns) {
            // Avoid validating auto incremental columns
            if (!$this->isColumnAutoIncremental($table, $uniqueColumns)) {
                $attributesCount = count($uniqueColumns);
                if ($attributesCount === 1) {
                    $rules[] = "[['" . $uniqueColumns[0] . "'], 'unique']";
                } elseif ($attributesCount > 1) {
                    $columnsList = implode("', '", $uniqueColumns);
                    $rules[] = "[['$columnsList'], 'unique', 'targetAttribute' => ['$columnsList']]";
                }
            }
        }
    } catch (NotSupportedException $e) {
        // doesn't support unique indexes information...do nothing
    }
    // Exist rules for foreign keys
    foreach ($table->foreignKeys as $refs) {
        $refTable = $refs[0];
        $refTableSchema = $db->getTableSchema($refTable);
        if ($refTableSchema === null) {
            // Foreign key could point to non-existing table: https://github.com/yiisoft/yii2-gii/issues/34
            continue;
        }
        $refClassName = $this->generateClassName($refTable);
        unset($refs[0]);
        $attributes = implode("', '", array_keys($refs));
        $targetAttributes = [];
        foreach ($refs as $key => $value) {
            $targetAttributes[] = "'$key' => '$value'";
        }
        $targetAttributes = implode(', ', $targetAttributes);
        $rules[] = "[['$attributes'], 'exist', 'skipOnError' => true, 'targetClass' => $refClassName::className(), 'targetAttribute' => [$targetAttributes]]";
    }
    return $rules;
}

            

                public function generateTableName($tableName)
{
    if (!$this->useTablePrefix) {
        return $tableName;
    }
    $db = $this->getDbConnection();
    if (preg_match("/^{$db->tablePrefix}(.*?)$/", $tableName, $matches)) {
        $tableName = '{{%' . $matches[1] . '}}';
    } elseif (preg_match("/^(.*?){$db->tablePrefix}$/", $tableName, $matches)) {
        $tableName = '{{' . $matches[1] . '%}}';
    }
    return $tableName;
}

            

                protected function getDbConnection()
{
    return Yii::$app->get($this->db, false);
}

            

                protected function getDbDriverName()
{
    /** @var Connection $db */
    $db = $this->getDbConnection();
    return $db instanceof \yii\db\Connection ? $db->driverName : null;
}

            

                public function getDescription()
{
    return 'This generator generates an ActiveRecord class for the specified database table.';
}

            

                public function getName()
{
    return 'Model Generator';
}

            

                protected function getSchemaNames()
{
    $db = $this->getDbConnection();
    if ($this->generateRelationsFromCurrentSchema) {
        if ($db->schema->defaultSchema !== null) {
            return [$db->schema->defaultSchema];
        }
        return [''];
    }
    $schema = $db->getSchema();
    if ($schema->hasMethod('getSchemaNames')) { // keep BC to Yii versions < 2.0.4
        try {
            $schemaNames = $schema->getSchemaNames();
        } catch (NotSupportedException $e) {
            // schema names are not supported by schema
        }
    }
    if (!isset($schemaNames)) {
        if (($pos = strpos($this->tableName, '.')) !== false) {
            $schemaNames = [substr($this->tableName, 0, $pos)];
        } else {
            $schemaNames = [''];
        }
    }
    return $schemaNames;
}

            

                protected function getTableNames()
{
    if ($this->tableNames !== null) {
        return $this->tableNames;
    }
    $db = $this->getDbConnection();
    if ($db === null) {
        return [];
    }
    $tableNames = [];
    if (strpos($this->tableName, '*') !== false) {
        if (($pos = strrpos($this->tableName, '.')) !== false) {
            $schema = substr($this->tableName, 0, $pos);
            $pattern = '/^' . str_replace('*', '\w+', substr($this->tableName, $pos + 1)) . '$/';
        } else {
            $schema = '';
            $pattern = '/^' . str_replace('*', '\w+', $this->tableName) . '$/';
        }
        foreach ($db->schema->getTableNames($schema) as $table) {
            if (preg_match($pattern, $table)) {
                $tableNames[] = $schema === '' ? $table : ($schema . '.' . $table);
            }
        }
    } elseif (($table = $db->getTableSchema($this->tableName, true)) !== null) {
        $tableNames[] = $this->tableName;
        $this->classNames[$this->tableName] = $this->modelClass;
    }
    return $this->tableNames = $tableNames;
}

            

                public function getTablePrefix()
{
    $db = $this->getDbConnection();
    if ($db !== null) {
        return $db->tablePrefix;
    }
    return '';
}

            

                public function hints()
{
    return array_merge(parent::hints(), [
        'ns' => 'This is the namespace of the ActiveRecord class to be generated, e.g., <code>app\models</code>',
        'db' => 'This is the ID of the DB application component.',
        'tableName' => 'This is the name of the DB table that the new ActiveRecord class is associated with, e.g. <code>post</code>.
            The table name may consist of the DB schema part if needed, e.g. <code>public.post</code>.
            The table name may end with asterisk to match multiple table names, e.g. <code>tbl_*</code>
            will match tables who name starts with <code>tbl_</code>. In this case, multiple ActiveRecord classes
            will be generated, one for each matching table name; and the class names will be generated from
            the matching characters. For example, table <code>tbl_post</code> will generate <code>Post</code>
            class.',
        'modelClass' => 'This is the name of the ActiveRecord class to be generated. The class name should not contain
            the namespace part as it is specified in "Namespace". You do not need to specify the class name
            if "Table Name" ends with asterisk, in which case multiple ActiveRecord classes will be generated.',
        'standardizeCapitals' => 'This indicates whether the generated class names should have standardized capitals. For example,
        table names like <code>SOME_TABLE</code> or <code>Other_Table</code> will have class names <code>SomeTable</code>
        and <code>OtherTable</code>, respectively. If not checked, the same tables will have class names <code>SOMETABLE</code>
        and <code>OtherTable</code> instead.',
        'baseClass' => 'This is the base class of the new ActiveRecord class. It should be a fully qualified namespaced class name.',
        'generateRelations' => 'This indicates whether the generator should generate relations based on
            foreign key constraints it detects in the database. Note that if your database contains too many tables,
            you may want to uncheck this option to accelerate the code generation process.',
        'generateRelationsFromCurrentSchema' => 'This indicates whether the generator should generate relations from current schema or from all available schemas.',
        'generateLabelsFromComments' => 'This indicates whether the generator should generate attribute labels
            by using the comments of the corresponding DB columns.',
        'useTablePrefix' => 'This indicates whether the table name returned by the generated ActiveRecord class
            should consider the <code>tablePrefix</code> setting of the DB connection. For example, if the
            table name is <code>tbl_post</code> and <code>tablePrefix=tbl_</code>, the ActiveRecord class
            will return the table name as <code>{{%post}}</code>.',
        'useSchemaName' => 'This indicates whether to include the schema name in the ActiveRecord class
            when it\'s auto generated. Only non default schema would be used.',
        'generateQuery' => 'This indicates whether to generate ActiveQuery for the ActiveRecord class.',
        'queryNs' => 'This is the namespace of the ActiveQuery class to be generated, e.g., <code>app\models</code>',
        'queryClass' => 'This is the name of the ActiveQuery class to be generated. The class name should not contain
            the namespace part as it is specified in "ActiveQuery Namespace". You do not need to specify the class name
            if "Table Name" ends with asterisk, in which case multiple ActiveQuery classes will be generated.',
        'queryBaseClass' => 'This is the base class of the new ActiveQuery class. It should be a fully qualified namespaced class name.',
    ]);
}

            

                protected function isColumnAutoIncremental($table, $columns)
{
    foreach ($columns as $column) {
        if (isset($table->columns[$column]) && $table->columns[$column]->autoIncrement) {
            return true;
        }
    }
    return false;
}

            

                protected function isHasManyRelation($table, $fks)
{
    $uniqueKeys = [$table->primaryKey];
    try {
        $uniqueKeys = array_merge($uniqueKeys, $this->getDbConnection()->getSchema()->findUniqueIndexes($table));
    } catch (NotSupportedException $e) {
        // ignore
    }
    foreach ($uniqueKeys as $uniqueKey) {
        if (count(array_diff(array_merge($uniqueKey, $fks), array_intersect($uniqueKey, $fks))) === 0) {
            return false;
        }
    }
    return true;
}

            

                public function requiredTemplates()
{
    // @todo make 'query.php' to be required before 2.1 release
    return ['model.php'/*, 'query.php'*/];
}

            

                public function rules()
{
    return array_merge(parent::rules(), [
        [['db', 'ns', 'tableName', 'modelClass', 'baseClass', 'queryNs', 'queryClass', 'queryBaseClass'], 'filter', 'filter' => 'trim'],
        [['ns', 'queryNs'], 'filter', 'filter' => function ($value) { return trim($value, '\\'); }],
        [['db', 'ns', 'tableName', 'baseClass', 'queryNs', 'queryBaseClass'], 'required'],
        [['db', 'modelClass', 'queryClass'], 'match', 'pattern' => '/^\w+$/', 'message' => 'Only word characters are allowed.'],
        [['ns', 'baseClass', 'queryNs', 'queryBaseClass'], 'match', 'pattern' => '/^[\w\\\\]+$/', 'message' => 'Only word characters and backslashes are allowed.'],
        [['tableName'], 'match', 'pattern' => '/^([\w ]+\.)?([\w\* ]+)$/', 'message' => 'Only word characters, and optionally spaces, an asterisk and/or a dot are allowed.'],
        [['db'], 'validateDb'],
        [['ns', 'queryNs'], 'validateNamespace'],
        [['tableName'], 'validateTableName'],
        [['modelClass'], 'validateModelClass', 'skipOnEmpty' => false],
        [['baseClass'], 'validateClass', 'params' => ['extends' => ActiveRecord::className()]],
        [['queryBaseClass'], 'validateClass', 'params' => ['extends' => ActiveQuery::className()]],
        [['generateRelations'], 'in', 'range' => [self::RELATIONS_NONE, self::RELATIONS_ALL, self::RELATIONS_ALL_INVERSE]],
        [['generateLabelsFromComments', 'useTablePrefix', 'useSchemaName', 'generateQuery', 'generateRelationsFromCurrentSchema'], 'boolean'],
        [['enableI18N', 'standardizeCapitals'], 'boolean'],
        [['messageCategory'], 'validateMessageCategory', 'skipOnEmpty' => false],
    ]);
}

            

                public function stickyAttributes()
{
    return array_merge(parent::stickyAttributes(), ['ns', 'db', 'baseClass', 'generateRelations', 'generateLabelsFromComments', 'queryNs', 'queryBaseClass', 'useTablePrefix', 'generateQuery']);
}

            

                public function validateDb()
{
    if (!Yii::$app->has($this->db)) {
        $this->addError('db', 'There is no application component named "db".');
    } elseif (!Yii::$app->get($this->db) instanceof Connection) {
        $this->addError('db', 'The "db" application component must be a DB connection instance.');
    }
}

            

                public function validateModelClass()
{
    if ($this->isReservedKeyword($this->modelClass)) {
        $this->addError('modelClass', 'Class name cannot be a reserved PHP keyword.');
    }
    if ((empty($this->tableName) || substr_compare($this->tableName, '*', -1, 1)) && $this->modelClass == '') {
        $this->addError('modelClass', 'Model Class cannot be blank if table name does not end with asterisk.');
    }
}

            

                public function validateNamespace($attribute)
{
    $value = $this->$attribute;
    $value = ltrim($value, '\\');
    $path = Yii::getAlias('@' . str_replace('\\', '/', $value), false);
    if ($path === false) {
        $this->addError($attribute, 'Namespace must be associated with an existing directory.');
    }
}

            

                public function validateTableName()
{
    if (strpos($this->tableName, '*') !== false && substr_compare($this->tableName, '*', -1, 1)) {
        $this->addError('tableName', 'Asterisk is only allowed as the last character.');
        return;
    }
    $tables = $this->getTableNames();
    if (empty($tables)) {
        $this->addError('tableName', "Table '{$this->tableName}' does not exist.");
    } else {
        foreach ($tables as $table) {
            $class = $this->generateClassName($table);
            if ($this->isReservedKeyword($class)) {
                $this->addError('tableName', "Table '$table' will generate a class which is a reserved PHP keyword.");
                break;
            }
        }
    }
}