Abstract Class yii\gii\Generator

Inheritanceyii\gii\Generator » yii\base\Model
Subclassesyii\gii\generators\controller\Generator, yii\gii\generators\crud\Generator, yii\gii\generators\extension\Generator, yii\gii\generators\form\Generator, yii\gii\generators\model\Generator, yii\gii\generators\module\Generator
Available since extension's version2.0
Source Code https://github.com/yiisoft/yii2-gii/blob/master/src/Generator.php

This is the base class for all generator classes.

A generator instance is responsible for taking user inputs, validating them, and using them to generate the corresponding code based on a set of code template files.

A generator class typically needs to implement the following methods:

  • getName(): returns the name of the generator
  • getDescription(): returns the detailed description of the generator
  • generate(): generates the code based on the current user input and the specified code template files. This is the place where main code generation code resides.

Public Properties

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Property Type Description Defined By
$description string The detailed description of the generator. yii\gii\Generator
$enableI18N boolean Whether the strings will be generated using Yii::t() or normal strings. yii\gii\Generator
$messageCategory string The message category used by Yii::t() when $enableI18N is true. yii\gii\Generator
$stickyDataFile string The file path that stores the sticky attribute values. yii\gii\Generator
$template string The name of the code template that the user has selected. yii\gii\Generator
$templatePath string The root path of the template files that are currently being used. yii\gii\Generator
$templates array A list of available code templates. yii\gii\Generator

Public Methods

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Method Description Defined By
attributeLabels() yii\gii\Generator
autoCompleteData() Returns the list of auto complete values. yii\gii\Generator
defaultTemplate() Returns the root path to the default code template files. yii\gii\Generator
formView() Returns the view file for the input form of the generator. yii\gii\Generator
generate() Generates the code based on the current user input and the specified code template files. yii\gii\Generator
generateString() Generates a string depending on enableI18N property yii\gii\Generator
getDescription() yii\gii\Generator
getName() yii\gii\Generator
getTemplatePath() yii\gii\Generator
hints() Returns the list of hint messages. yii\gii\Generator
init() yii\gii\Generator
isReservedKeyword() yii\gii\Generator
render() Generates code using the specified code template and parameters. yii\gii\Generator
requiredTemplates() Returns a list of code template files that are required. yii\gii\Generator
rules() yii\gii\Generator
save() Saves the generated code into files. yii\gii\Generator
stickyAttributes() Returns the list of sticky attributes. yii\gii\Generator
successMessage() Returns the message to be displayed when the newly generated code is saved successfully. yii\gii\Generator
validateClass() An inline validator that checks if the attribute value refers to an existing class name. yii\gii\Generator
validateMessageCategory() Checks if message category is not empty when I18N is enabled. yii\gii\Generator
validateNewClass() An inline validator that checks if the attribute value refers to a valid namespaced class name. yii\gii\Generator
validateTemplate() Validates the template selection. yii\gii\Generator

Property Details

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$description public property

The detailed description of the generator. This property is read-only.

public string $description null
$enableI18N public property

Whether the strings will be generated using Yii::t() or normal strings.

public boolean $enableI18N false
$messageCategory public property

The message category used by Yii::t() when $enableI18N is true. Defaults to app.

public string $messageCategory 'app'
$stickyDataFile public property

The file path that stores the sticky attribute values. This property is read-only.

public string $stickyDataFile null
$template public property

The name of the code template that the user has selected. The value of this property is internally managed by this class.

public string $template 'default'
$templatePath public property

The root path of the template files that are currently being used. This property is read-only.

public string $templatePath null
$templates public property

A list of available code templates. The array keys are the template names, and the array values are the corresponding template paths or path aliases.

public array $templates = []

Method Details

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attributeLabels() public method

public void attributeLabels ( )

                public function attributeLabels()
{
    return [
        'enableI18N' => 'Enable I18N',
        'messageCategory' => 'Message Category',
    ];
}

            
autoCompleteData() public method

Returns the list of auto complete values.

The array keys are the attribute names, and the array values are the corresponding auto complete values. Auto complete values can also be callable typed in order one want to make postponed data generation.

public array autoCompleteData ( )
return array

The list of auto complete values

                public function autoCompleteData()
{
    return [];
}

            
defaultTemplate() public method

Returns the root path to the default code template files.

The default implementation will return the "templates" subdirectory of the directory containing the generator class file.

public string defaultTemplate ( )
return string

The root path to the default code template files.

                public function defaultTemplate()
{
    $class = new ReflectionClass($this);
    return dirname($class->getFileName()) . '/default';
}

            
formView() public method

Returns the view file for the input form of the generator.

The default implementation will return the "form.php" file under the directory that contains the generator class file.

public string formView ( )
return string

The view file for the input form of the generator.

                public function formView()
{
    $class = new ReflectionClass($this);
    return dirname($class->getFileName()) . '/form.php';
}

            
generate() public abstract method

Generates the code based on the current user input and the specified code template files.

This is the main method that child classes should implement. Please refer to yii\gii\generators\controller\Generator::generate() as an example on how to implement this method.

public abstract yii\gii\CodeFile[] generate ( )
return yii\gii\CodeFile[]

A list of code files to be created.

                abstract public function generate();

            
generateString() public method

Generates a string depending on enableI18N property

public string generateString ( $string '', $placeholders = [] )
$string string

The text be generated

$placeholders array

The placeholders to use by Yii::t()

                public function generateString($string = '', $placeholders = [])
{
    $string = addslashes($string);
    if ($this->enableI18N) {
        // If there are placeholders, use them
        if (!empty($placeholders)) {
            $ph = ', ' . VarDumper::export($placeholders);
        } else {
            $ph = '';
        }
        $str = "Yii::t('" . $this->messageCategory . "', '" . $string . "'" . $ph . ")";
    } else {
        // No I18N, replace placeholders by real words, if any
        if (!empty($placeholders)) {
            $phKeys = array_map(function($word) {
                return '{' . $word . '}';
            }, array_keys($placeholders));
            $phValues = array_values($placeholders);
            $str = "'" . str_replace($phKeys, $phValues, $string) . "'";
        } else {
            // No placeholders, just the given string
            $str = "'" . $string . "'";
        }
    }
    return $str;
}

            
getDescription() public method

public string getDescription ( )
return string

The detailed description of the generator.

                public function getDescription()
{
    return '';
}

            
getName() public abstract method

public abstract string getName ( )
return string

Name of the code generator

                abstract public function getName();

            
getTemplatePath() public method

public string getTemplatePath ( )
return string

The root path of the template files that are currently being used.

throws \yii\base\InvalidConfigException

if $template is invalid

                public function getTemplatePath()
{
    if (isset($this->templates[$this->template])) {
        return $this->templates[$this->template];
    }
    throw new InvalidConfigException("Unknown template: {$this->template}");
}

            
hints() public method

Returns the list of hint messages.

The array keys are the attribute names, and the array values are the corresponding hint messages. Hint messages will be displayed to end users when they are filling the form for the generator.

public array hints ( )
return array

The list of hint messages

                public function hints()
{
    return [
        'enableI18N' => 'This indicates whether the generator should generate strings using <code>Yii::t()</code> method.
            Set this to <code>true</code> if you are planning to make your application translatable.',
        'messageCategory' => 'This is the category used by <code>Yii::t()</code> in case you enable I18N.',
    ];
}

            
init() public method

public void init ( )

                public function init()
{
    parent::init();
    if (!isset($this->templates['default'])) {
        $this->templates['default'] = $this->defaultTemplate();
    }
    foreach ($this->templates as $i => $template) {
        $this->templates[$i] = Yii::getAlias($template);
    }
}

            
isReservedKeyword() public method

public boolean isReservedKeyword ( $value )
$value string

The attribute to be validated

return boolean

Whether the value is a reserved PHP keyword.

                public function isReservedKeyword($value)
{
    static $keywords = [
        '__class__',
        '__dir__',
        '__file__',
        '__function__',
        '__line__',
        '__method__',
        '__namespace__',
        '__trait__',
        'abstract',
        'and',
        'array',
        'as',
        'break',
        'case',
        'catch',
        'callable',
        'cfunction',
        'class',
        'clone',
        'const',
        'continue',
        'declare',
        'default',
        'die',
        'do',
        'echo',
        'else',
        'elseif',
        'empty',
        'enddeclare',
        'endfor',
        'endforeach',
        'endif',
        'endswitch',
        'endwhile',
        'eval',
        'exception',
        'exit',
        'extends',
        'final',
        'finally',
        'for',
        'foreach',
        'function',
        'global',
        'goto',
        'if',
        'implements',
        'include',
        'include_once',
        'instanceof',
        'insteadof',
        'interface',
        'isset',
        'list',
        'namespace',
        'new',
        'old_function',
        'or',
        'parent',
        'php_user_filter',
        'print',
        'private',
        'protected',
        'public',
        'require',
        'require_once',
        'return',
        'static',
        'switch',
        'this',
        'throw',
        'trait',
        'try',
        'unset',
        'use',
        'var',
        'while',
        'xor',
    ];
    return in_array(strtolower($value), $keywords, true);
}

            
render() public method

Generates code using the specified code template and parameters.

Note that the code template will be used as a PHP file.

public string render ( $template, $params = [] )
$template string

The code template file. This must be specified as a file path relative to $templatePath.

$params array

List of parameters to be passed to the template file.

return string

The generated code

                public function render($template, $params = [])
{
    $view = new View();
    $params['generator'] = $this;
    return $view->renderFile($this->getTemplatePath() . '/' . $template, $params, $this);
}

            
requiredTemplates() public method

Returns a list of code template files that are required.

Derived classes usually should override this method if they require the existence of certain template files.

public array requiredTemplates ( )
return array

List of code template files that are required. They should be file paths relative to $templatePath.

                public function requiredTemplates()
{
    return [];
}

            
rules() public method

Child classes should override this method like the following so that the parent rules are included:

return array_merge(parent::rules(), [
    ...rules for the child class...
]);
public void rules ( )

                public function rules()
{
    return [
        [['template'], 'required', 'message' => 'A code template must be selected.'],
        [['template'], 'validateTemplate'],
    ];
}

            
save() public method

Saves the generated code into files.

public boolean save ( $files, $answers, &$results )
$files yii\gii\CodeFile[]

The code files to be saved

$answers array
$results string

This parameter receives a value from this method indicating the log messages generated while saving the code files.

return boolean

Whether files are successfully saved without any error.

                public function save($files, $answers, &$results)
{
    $lines = ['Generating code using template "' . $this->getTemplatePath() . '"...'];
    $hasError = false;
    foreach ($files as $file) {
        $relativePath = $file->getRelativePath();
        if (isset($answers[$file->id]) && !empty($answers[$file->id]) && $file->operation !== CodeFile::OP_SKIP) {
            $error = $file->save();
            if (is_string($error)) {
                $hasError = true;
                $lines[] = "generating $relativePath\n<span class=\"error\">$error</span>";
            } else {
                $lines[] = $file->operation === CodeFile::OP_CREATE ? " generated $relativePath" : " overwrote $relativePath";
            }
        } else {
            $lines[] = "   skipped $relativePath";
        }
    }
    $lines[] = "done!\n";
    $results = implode("\n", $lines);
    return !$hasError;
}

            
stickyAttributes() public method

Returns the list of sticky attributes.

A sticky attribute will remember its value and will initialize the attribute with this value when the generator is restarted.

public array stickyAttributes ( )
return array

List of sticky attributes

                public function stickyAttributes()
{
    return ['template', 'enableI18N', 'messageCategory'];
}

            
successMessage() public method

Returns the message to be displayed when the newly generated code is saved successfully.

Child classes may override this method to customize the message.

public string successMessage ( )
return string

The message to be displayed when the newly generated code is saved successfully.

                public function successMessage()
{
    return 'The code has been generated successfully.';
}

            
validateClass() public method

An inline validator that checks if the attribute value refers to an existing class name.

If the extends option is specified, it will also check if the class is a child class of the class represented by the extends option.

public void validateClass ( $attribute, $params )
$attribute string

The attribute being validated

$params array

The validation options

                public function validateClass($attribute, $params)
{
    $class = $this->$attribute;
    try {
        if (class_exists($class)) {
            if (isset($params['extends'])) {
                if (ltrim($class, '\\') !== ltrim($params['extends'], '\\') && !is_subclass_of($class, $params['extends'])) {
                    $this->addError($attribute, "'$class' must extend from {$params['extends']} or its child class.");
                }
            }
        } else {
            $this->addError($attribute, "Class '$class' does not exist or has syntax error.");
        }
    } catch (\Exception $e) {
        $this->addError($attribute, "Class '$class' does not exist or has syntax error.");
    }
}

            
validateMessageCategory() public method

Checks if message category is not empty when I18N is enabled.

public void validateMessageCategory ( )

                public function validateMessageCategory()
{
    if ($this->enableI18N && empty($this->messageCategory)) {
        $this->addError('messageCategory', "Message Category cannot be blank.");
    }
}

            
validateNewClass() public method

An inline validator that checks if the attribute value refers to a valid namespaced class name.

The validator will check if the directory containing the new class file exist or not.

public void validateNewClass ( $attribute, $params )
$attribute string

The attribute being validated

$params array

The validation options

                public function validateNewClass($attribute, $params)
{
    $class = ltrim($this->$attribute, '\\');
    if (($pos = strrpos($class, '\\')) === false) {
        $this->addError($attribute, "The class name must contain fully qualified namespace name.");
    } else {
        $ns = substr($class, 0, $pos);
        $path = Yii::getAlias('@' . str_replace('\\', '/', $ns), false);
        if ($path === false) {
            $this->addError($attribute, "The class namespace is invalid: $ns");
        } elseif (!is_dir($path)) {
            $this->addError($attribute, "Please make sure the directory containing this class exists: $path");
        }
    }
}

            
validateTemplate() public method

Validates the template selection.

This method validates whether the user selects an existing template and the template contains all required template files as specified in requiredTemplates().

public void validateTemplate ( )

                public function validateTemplate()
{
    $templates = $this->templates;
    if (!isset($templates[$this->template])) {
        $this->addError('template', 'Invalid template selection.');
    } else {
        $templatePath = $this->templates[$this->template];
        foreach ($this->requiredTemplates() as $template) {
            if (!is_file(Yii::getAlias($templatePath . '/' . $template))) {
                $this->addError('template', "Unable to find the required code template file '$template'.");
            }
        }
    }
}