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created

UniqueValidator::getTargetClass()   A

Complexity

Conditions 2
Paths 2

Size

Total Lines 4
Code Lines 2

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 2
CRAP Score 2

Importance

Changes 0
Metric Value
c 0
b 0
f 0
dl 0
loc 4
ccs 2
cts 2
cp 1
rs 10
cc 2
eloc 2
nc 2
nop 1
crap 2
1
<?php
2
/**
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 * @link http://www.yiiframework.com/
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 * @copyright Copyright (c) 2008 Yii Software LLC
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 * @license http://www.yiiframework.com/license/
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 */
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namespace yii\validators;
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use Yii;
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use yii\base\Model;
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use yii\db\ActiveQuery;
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use yii\db\ActiveRecord;
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use yii\db\ActiveQueryInterface;
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use yii\db\ActiveRecordInterface;
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use yii\helpers\Inflector;
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/**
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 * UniqueValidator validates that the attribute value is unique in the specified database table.
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 *
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 * UniqueValidator checks if the value being validated is unique in the table column specified by
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 * the ActiveRecord class [[targetClass]] and the attribute [[targetAttribute]].
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 *
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 * The following are examples of validation rules using this validator:
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 *
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 * ```php
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 * // a1 needs to be unique
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 * ['a1', 'unique']
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 * // a1 needs to be unique, but column a2 will be used to check the uniqueness of the a1 value
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 * ['a1', 'unique', 'targetAttribute' => 'a2']
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 * // a1 and a2 need to be unique together, and they both will receive error message
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 * [['a1', 'a2'], 'unique', 'targetAttribute' => ['a1', 'a2']]
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 * // a1 and a2 need to be unique together, only a1 will receive error message
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 * ['a1', 'unique', 'targetAttribute' => ['a1', 'a2']]
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 * // a1 needs to be unique by checking the uniqueness of both a2 and a3 (using a1 value)
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 * ['a1', 'unique', 'targetAttribute' => ['a2', 'a1' => 'a3']]
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 * ```
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 *
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 * @author Qiang Xue <[email protected]>
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 * @since 2.0
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 */
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class UniqueValidator extends Validator
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{
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    /**
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     * @var string the name of the ActiveRecord class that should be used to validate the uniqueness
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     * of the current attribute value. If not set, it will use the ActiveRecord class of the attribute being validated.
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     * @see targetAttribute
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     */
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    public $targetClass;
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    /**
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     * @var string|array the name of the [[\yii\db\ActiveRecord|ActiveRecord]] attribute that should be used to
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     * validate the uniqueness of the current attribute value. If not set, it will use the name
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     * of the attribute currently being validated. You may use an array to validate the uniqueness
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     * of multiple columns at the same time. The array values are the attributes that will be
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     * used to validate the uniqueness, while the array keys are the attributes whose values are to be validated.
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     */
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    public $targetAttribute;
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    /**
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     * @var string|array|\Closure additional filter to be applied to the DB query used to check the uniqueness of the attribute value.
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     * This can be a string or an array representing the additional query condition (refer to [[\yii\db\Query::where()]]
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     * on the format of query condition), or an anonymous function with the signature `function ($query)`, where `$query`
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     * is the [[\yii\db\Query|Query]] object that you can modify in the function.
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     */
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    public $filter;
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    /**
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     * @var string the user-defined error message.
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     *
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     * When validating single attribute, it may contain
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     * the following placeholders which will be replaced accordingly by the validator:
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     *
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     * - `{attribute}`: the label of the attribute being validated
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     * - `{value}`: the value of the attribute being validated
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     *
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     * When validating mutliple attributes, it may contain the following placeholders:
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     *
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     * - `{attributes}`: the labels of the attributes being validated.
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     * - `{values}`: the values of the attributes being validated.
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     *
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     */
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    public $message;
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    /**
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     * @var string
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     * @since 2.0.9
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     * @deprecated since version 2.0.10, to be removed in 2.1. Use [[message]] property
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     * to setup custom message for multiple target attributes.
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     */
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    public $comboNotUnique;
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    /**
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     * @var string and|or define how target attributes are related
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     * @since 2.0.11
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     */
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    public $targetAttributeJunction = 'and';
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    /**
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     * @inheritdoc
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     */
98 54
    public function init()
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    {
100 54
        parent::init();
101 54
        if ($this->message !== null) {
102 3
            return;
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        }
104 54
        if (is_array($this->targetAttribute) && count($this->targetAttribute) > 1) {
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            // fallback for deprecated `comboNotUnique` property - use it as message if is set
106 6
            if ($this->comboNotUnique === null) {
0 ignored issues
show
Deprecated Code introduced by
The property yii\validators\UniqueValidator::$comboNotUnique has been deprecated with message: since version 2.0.10, to be removed in 2.1. Use [[message]] property
to setup custom message for multiple target attributes.

This property has been deprecated. The supplier of the class has supplied an explanatory message.

The explanatory message should give you some clue as to whether and when the property will be removed from the class and what other property to use instead.

Loading history...
107 3
                $this->message = Yii::t('yii', 'The combination {values} of {attributes} has already been taken.');
108 3
            } else {
109 3
                $this->message = $this->comboNotUnique;
0 ignored issues
show
Deprecated Code introduced by
The property yii\validators\UniqueValidator::$comboNotUnique has been deprecated with message: since version 2.0.10, to be removed in 2.1. Use [[message]] property
to setup custom message for multiple target attributes.

This property has been deprecated. The supplier of the class has supplied an explanatory message.

The explanatory message should give you some clue as to whether and when the property will be removed from the class and what other property to use instead.

Loading history...
110
            }
111 6
        } else {
112 51
            $this->message = Yii::t('yii', '{attribute} "{value}" has already been taken.');
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        }
114 54
    }
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    /**
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     * @inheritdoc
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     */
119 39
    public function validateAttribute($model, $attribute)
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    {
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        /* @var $targetClass ActiveRecordInterface */
122 39
        $targetClass = $this->getTargetClass($model);
123 39
        $targetAttribute = $this->targetAttribute === null ? $attribute : $this->targetAttribute;
124 39
        $rawConditions = $this->prepareConditions($targetAttribute, $model, $attribute);
125 39
        $conditions[] = $this->targetAttributeJunction === 'or' ? 'or' : 'and';
0 ignored issues
show
Coding Style Comprehensibility introduced by
$conditions was never initialized. Although not strictly required by PHP, it is generally a good practice to add $conditions = array(); before regardless.

Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.

Let’s take a look at an example:

foreach ($collection as $item) {
    $myArray['foo'] = $item->getFoo();

    if ($item->hasBar()) {
        $myArray['bar'] = $item->getBar();
    }

    // do something with $myArray
}

As you can see in this example, the array $myArray is initialized the first time when the foreach loop is entered. You can also see that the value of the bar key is only written conditionally; thus, its value might result from a previous iteration.

This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.

Loading history...
126
127 39
        foreach ($rawConditions as $key => $value) {
128 39
            if (is_array($value)) {
129 6
                $this->addError($model, $attribute, Yii::t('yii', '{attribute} is invalid.'));
130 6
                return;
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            }
132 36
            $conditions[] = [$key => $value];
133 36
        }
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135 36
        if ($this->modelExists($targetClass, $conditions, $model)) {
0 ignored issues
show
Documentation introduced by
$targetClass is of type object<yii\db\ActiveRecordInterface>, but the function expects a string.

It seems like the type of the argument is not accepted by the function/method which you are calling.

In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.

We suggest to add an explicit type cast like in the following example:

function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
Loading history...
136 29
            if (count($targetAttribute) > 1) {
137 6
                $this->addComboNotUniqueError($model, $attribute);
138 6
            } else {
139 29
                $this->addError($model, $attribute, $this->message);
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            }
141 29
        }
142 33
    }
143
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    /**
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     * @param Model $model the data model to be validated
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     * @return string Target class name
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     */
148 48
    private function getTargetClass($model)
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    {
150 48
        return $this->targetClass === null ? get_class($model) : $this->targetClass;
151
    }
152
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    /**
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     * Checks whether the $model exists in the database.
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     *
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     * @param string $targetClass the name of the ActiveRecord class that should be used to validate the uniqueness
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     * of the current attribute value.
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     * @param array $conditions conditions, compatible with [[\yii\db\Query::where()|Query::where()]] key-value format.
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     * @param Model $model the data model to be validated
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     *
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     * @return bool whether the model already exists
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     */
163 36
    private function modelExists($targetClass, $conditions, $model)
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    {
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        /** @var ActiveRecordInterface $targetClass $query */
166 36
        $query = $this->prepareQuery($targetClass, $conditions);
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168 36
        if (!$model instanceof ActiveRecordInterface || $model->getIsNewRecord() || $model->className() !== $targetClass::className()) {
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            // if current $model isn't in the database yet then it's OK just to call exists()
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            // also there's no need to run check based on primary keys, when $targetClass is not the same as $model's class
171 33
            $exists = $query->exists();
172 30
        } else {
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            // if current $model is in the database already we can't use exists()
174 13
            if ($query instanceof \yii\db\ActiveQuery) {
175
                // only select primary key to optimize query
176 13
                $query->select($targetClass::primaryKey());
177 13
            }
178 13
            $models = $query->limit(2)->asArray()->all();
179 13
            $n = count($models);
180 13
            if ($n === 1) {
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                // if there is one record, check if it is the currently validated model
182 13
                $dbModel = reset($models);
183 13
                $pks = $targetClass::primaryKey();
184 13
                $pk = [];
185 13
                foreach ($pks as $pkAttribute) {
186 13
                    $pk[$pkAttribute] = $dbModel[$pkAttribute];
187 13
                }
188 13
                $exists = ($pk != $model->getOldPrimaryKey(true));
189 13
            } else {
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                // if there is more than one record, the value is not unique
191 3
                $exists = $n > 1;
192
            }
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        }
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195 33
        return $exists;
196
    }
197
198
    /**
199
     * Prepares a query by applying filtering conditions defined in $conditions method property
200
     * and [[filter]] class property.
201
     *
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     * @param ActiveRecordInterface $targetClass the name of the ActiveRecord class that should be used to validate
203
     * the uniqueness of the current attribute value.
204
     * @param array $conditions conditions, compatible with [[\yii\db\Query::where()|Query::where()]] key-value format
205
     *
206
     * @return ActiveQueryInterface|ActiveQuery
207
     */
208 39
    private function prepareQuery($targetClass, $conditions)
209
    {
210 39
        $query = $targetClass::find();
211 39
        $query->andWhere($conditions);
212 39
        if ($this->filter instanceof \Closure) {
213 3
            call_user_func($this->filter, $query);
214 39
        } elseif ($this->filter !== null) {
215 3
            $query->andWhere($this->filter);
216 3
        }
217
218 39
        return $query;
219
    }
220
221
    /**
222
     * Processes attributes' relations described in $targetAttribute parameter into conditions, compatible with
223
     * [[\yii\db\Query::where()|Query::where()]] key-value format.
224
     *
225
     * @param string|array $targetAttribute the name of the [[\yii\db\ActiveRecord|ActiveRecord]] attribute that
226
     * should be used to validate the uniqueness of the current attribute value. You may use an array to validate
227
     * the uniqueness of multiple columns at the same time. The array values are the attributes that will be
228
     * used to validate the uniqueness, while the array keys are the attributes whose values are to be validated.
229
     * If the key and the value are the same, you can just specify the value.
230
     * @param Model $model the data model to be validated
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     * @param string $attribute the name of the attribute to be validated in the $model
232
     *
233
     * @return array conditions, compatible with [[\yii\db\Query::where()|Query::where()]] key-value format.
234
     */
235 42
    private function prepareConditions($targetAttribute, $model, $attribute)
236
    {
237 42
        if (is_array($targetAttribute)) {
238 15
            $conditions = [];
239 15
            foreach ($targetAttribute as $k => $v) {
240 15
                $conditions[$v] = is_int($k) ? $model->$v : $model->$k;
241 15
            }
242 15
        } else {
243 36
            $conditions = [$targetAttribute => $model->$attribute];
244
        }
245
246 42
        if (!$model instanceof ActiveRecord) {
247 9
            return $conditions;
248
        }
249
250
        // Add table prefix for column
251 39
        $targetClass = $this->getTargetClass($model);
252 39
        $tableName = $targetClass::tableName();
253 39
        $conditionsWithTableName = [];
254 39
        foreach ($conditions as $columnName => $columnValue) {
255 39
            $prefixedColumnName = "{$tableName}.$columnName";
256 39
            $conditionsWithTableName[$prefixedColumnName] = $columnValue;
257 39
        }
258
259 39
        return $conditionsWithTableName;
260
    }
261
262
    /**
263
     * Builds and adds [[comboNotUnique]] error message to the specified model attribute.
264
     * @param \yii\base\Model $model the data model.
265
     * @param string $attribute the name of the attribute.
266
     */
267 6
    private function addComboNotUniqueError($model, $attribute)
268
    {
269 6
        $attributeCombo = [];
270 6
        $valueCombo = [];
271 6
        foreach ($this->targetAttribute as $key => $value) {
0 ignored issues
show
Bug introduced by
The expression $this->targetAttribute of type string|array is not guaranteed to be traversable. How about adding an additional type check?

There are different options of fixing this problem.

  1. If you want to be on the safe side, you can add an additional type-check:

    $collection = json_decode($data, true);
    if ( ! is_array($collection)) {
        throw new \RuntimeException('$collection must be an array.');
    }
    
    foreach ($collection as $item) { /** ... */ }
    
  2. If you are sure that the expression is traversable, you might want to add a doc comment cast to improve IDE auto-completion and static analysis:

    /** @var array $collection */
    $collection = json_decode($data, true);
    
    foreach ($collection as $item) { /** .. */ }
    
  3. Mark the issue as a false-positive: Just hover the remove button, in the top-right corner of this issue for more options.

Loading history...
272 6
            if (is_int($key)) {
273 6
                $attributeCombo[] = $model->getAttributeLabel($value);
274 6
                $valueCombo[] = '"' . $model->$value . '"';
275 6
            } else {
276
                $attributeCombo[] = $model->getAttributeLabel($key);
277
                $valueCombo[] = '"' . $model->$key . '"';
278
            }
279 6
        }
280 6
        $this->addError($model, $attribute, $this->message, [
281 6
            'attributes' => Inflector::sentence($attributeCombo),
282 6
            'values' => implode('-', $valueCombo)
283 6
        ]);
284 6
    }
285
}
286