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Differences Between: [Versions 310 and 400] [Versions 39 and 400] [Versions 400 and 401]

   1  <?php
   2  /*
   3   * Copyright 2015-2017 MongoDB, Inc.
   4   *
   5   * Licensed under the Apache License, Version 2.0 (the "License");
   6   * you may not use this file except in compliance with the License.
   7   * You may obtain a copy of the License at
   8   *
   9   *   http://www.apache.org/licenses/LICENSE-2.0
  10   *
  11   * Unless required by applicable law or agreed to in writing, software
  12   * distributed under the License is distributed on an "AS IS" BASIS,
  13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14   * See the License for the specific language governing permissions and
  15   * limitations under the License.
  16   */
  17  
  18  namespace MongoDB\Operation;
  19  
  20  use MongoDB\Driver\Cursor;
  21  use MongoDB\Driver\Exception\RuntimeException as DriverRuntimeException;
  22  use MongoDB\Driver\Query;
  23  use MongoDB\Driver\ReadConcern;
  24  use MongoDB\Driver\ReadPreference;
  25  use MongoDB\Driver\Server;
  26  use MongoDB\Driver\Session;
  27  use MongoDB\Exception\InvalidArgumentException;
  28  use MongoDB\Exception\UnsupportedException;
  29  use function is_array;
  30  use function is_bool;
  31  use function is_integer;
  32  use function is_object;
  33  use function is_string;
  34  use function MongoDB\server_supports_feature;
  35  use function trigger_error;
  36  use const E_USER_DEPRECATED;
  37  
  38  /**
  39   * Operation for the find command.
  40   *
  41   * @api
  42   * @see \MongoDB\Collection::find()
  43   * @see http://docs.mongodb.org/manual/tutorial/query-documents/
  44   * @see http://docs.mongodb.org/manual/reference/operator/query-modifier/
  45   */
  46  class Find implements Executable, Explainable
  47  {
  48      const NON_TAILABLE = 1;
  49      const TAILABLE = 2;
  50      const TAILABLE_AWAIT = 3;
  51  
  52      /** @var integer */
  53      private static $wireVersionForCollation = 5;
  54  
  55      /** @var integer */
  56      private static $wireVersionForReadConcern = 4;
  57  
  58      /** @var integer */
  59      private static $wireVersionForAllowDiskUseServerSideError = 4;
  60  
  61      /** @var string */
  62      private $databaseName;
  63  
  64      /** @var string */
  65      private $collectionName;
  66  
  67      /** @var array|object */
  68      private $filter;
  69  
  70      /** @var array */
  71      private $options;
  72  
  73      /**
  74       * Constructs a find command.
  75       *
  76       * Supported options:
  77       *
  78       *  * allowDiskUse (boolean): Enables writing to temporary files. When set
  79       *    to true, queries can write data to the _tmp sub-directory in the
  80       *    dbPath directory. The default is false.
  81       *
  82       *  * allowPartialResults (boolean): Get partial results from a mongos if
  83       *    some shards are inaccessible (instead of throwing an error).
  84       *
  85       *  * batchSize (integer): The number of documents to return per batch.
  86       *
  87       *  * collation (document): Collation specification.
  88       *
  89       *    This is not supported for server versions < 3.4 and will result in an
  90       *    exception at execution time if used.
  91       *
  92       *  * comment (string): Attaches a comment to the query. If "$comment" also
  93       *    exists in the modifiers document, this option will take precedence.
  94       *
  95       *  * cursorType (enum): Indicates the type of cursor to use. Must be either
  96       *    NON_TAILABLE, TAILABLE, or TAILABLE_AWAIT. The default is
  97       *    NON_TAILABLE.
  98       *
  99       *  * hint (string|document): The index to use. Specify either the index
 100       *    name as a string or the index key pattern as a document. If specified,
 101       *    then the query system will only consider plans using the hinted index.
 102       *
 103       *  * limit (integer): The maximum number of documents to return.
 104       *
 105       *  * max (document): The exclusive upper bound for a specific index.
 106       *
 107       *  * maxAwaitTimeMS (integer): The maxium amount of time for the server to wait
 108       *    on new documents to satisfy a query, if cursorType is TAILABLE_AWAIT.
 109       *
 110       *  * maxScan (integer): Maximum number of documents or index keys to scan
 111       *    when executing the query.
 112       *
 113       *    This option has been deprecated since version 1.4.
 114       *
 115       *  * maxTimeMS (integer): The maximum amount of time to allow the query to
 116       *    run. If "$maxTimeMS" also exists in the modifiers document, this
 117       *    option will take precedence.
 118       *
 119       *  * min (document): The inclusive upper bound for a specific index.
 120       *
 121       *  * modifiers (document): Meta operators that modify the output or
 122       *    behavior of a query. Use of these operators is deprecated in favor of
 123       *    named options.
 124       *
 125       *  * noCursorTimeout (boolean): The server normally times out idle cursors
 126       *    after an inactivity period (10 minutes) to prevent excess memory use.
 127       *    Set this option to prevent that.
 128       *
 129       *  * oplogReplay (boolean): Internal replication use only. The driver
 130       *    should not set this. This option is deprecated as of MongoDB 4.4.
 131       *
 132       *  * projection (document): Limits the fields to return for the matching
 133       *    document.
 134       *
 135       *  * readConcern (MongoDB\Driver\ReadConcern): Read concern.
 136       *
 137       *    This is not supported for server versions < 3.2 and will result in an
 138       *    exception at execution time if used.
 139       *
 140       *  * readPreference (MongoDB\Driver\ReadPreference): Read preference.
 141       *
 142       *  * returnKey (boolean): If true, returns only the index keys in the
 143       *    resulting documents.
 144       *
 145       *  * session (MongoDB\Driver\Session): Client session.
 146       *
 147       *    Sessions are not supported for server versions < 3.6.
 148       *
 149       *  * showRecordId (boolean): Determines whether to return the record
 150       *    identifier for each document. If true, adds a field $recordId to the
 151       *    returned documents.
 152       *
 153       *  * skip (integer): The number of documents to skip before returning.
 154       *
 155       *  * snapshot (boolean): Prevents the cursor from returning a document more
 156       *    than once because of an intervening write operation.
 157       *
 158       *    This options has been deprecated since version 1.4.
 159       *
 160       *  * sort (document): The order in which to return matching documents. If
 161       *    "$orderby" also exists in the modifiers document, this option will
 162       *    take precedence.
 163       *
 164       *  * typeMap (array): Type map for BSON deserialization. This will be
 165       *    applied to the returned Cursor (it is not sent to the server).
 166       *
 167       * @param string       $databaseName   Database name
 168       * @param string       $collectionName Collection name
 169       * @param array|object $filter         Query by which to filter documents
 170       * @param array        $options        Command options
 171       * @throws InvalidArgumentException for parameter/option parsing errors
 172       */
 173      public function __construct($databaseName, $collectionName, $filter, array $options = [])
 174      {
 175          if (! is_array($filter) && ! is_object($filter)) {
 176              throw InvalidArgumentException::invalidType('$filter', $filter, 'array or object');
 177          }
 178  
 179          if (isset($options['allowDiskUse']) && ! is_bool($options['allowDiskUse'])) {
 180              throw InvalidArgumentException::invalidType('"allowDiskUse" option', $options['allowDiskUse'], 'boolean');
 181          }
 182  
 183          if (isset($options['allowPartialResults']) && ! is_bool($options['allowPartialResults'])) {
 184              throw InvalidArgumentException::invalidType('"allowPartialResults" option', $options['allowPartialResults'], 'boolean');
 185          }
 186  
 187          if (isset($options['batchSize']) && ! is_integer($options['batchSize'])) {
 188              throw InvalidArgumentException::invalidType('"batchSize" option', $options['batchSize'], 'integer');
 189          }
 190  
 191          if (isset($options['collation']) && ! is_array($options['collation']) && ! is_object($options['collation'])) {
 192              throw InvalidArgumentException::invalidType('"collation" option', $options['collation'], 'array or object');
 193          }
 194  
 195          if (isset($options['comment']) && ! is_string($options['comment'])) {
 196              throw InvalidArgumentException::invalidType('"comment" option', $options['comment'], 'comment');
 197          }
 198  
 199          if (isset($options['cursorType'])) {
 200              if (! is_integer($options['cursorType'])) {
 201                  throw InvalidArgumentException::invalidType('"cursorType" option', $options['cursorType'], 'integer');
 202              }
 203  
 204              if ($options['cursorType'] !== self::NON_TAILABLE &&
 205                  $options['cursorType'] !== self::TAILABLE &&
 206                  $options['cursorType'] !== self::TAILABLE_AWAIT) {
 207                  throw new InvalidArgumentException('Invalid value for "cursorType" option: ' . $options['cursorType']);
 208              }
 209          }
 210  
 211          if (isset($options['hint']) && ! is_string($options['hint']) && ! is_array($options['hint']) && ! is_object($options['hint'])) {
 212              throw InvalidArgumentException::invalidType('"hint" option', $options['hint'], 'string or array or object');
 213          }
 214  
 215          if (isset($options['limit']) && ! is_integer($options['limit'])) {
 216              throw InvalidArgumentException::invalidType('"limit" option', $options['limit'], 'integer');
 217          }
 218  
 219          if (isset($options['max']) && ! is_array($options['max']) && ! is_object($options['max'])) {
 220              throw InvalidArgumentException::invalidType('"max" option', $options['max'], 'array or object');
 221          }
 222  
 223          if (isset($options['maxAwaitTimeMS']) && ! is_integer($options['maxAwaitTimeMS'])) {
 224              throw InvalidArgumentException::invalidType('"maxAwaitTimeMS" option', $options['maxAwaitTimeMS'], 'integer');
 225          }
 226  
 227          if (isset($options['maxScan']) && ! is_integer($options['maxScan'])) {
 228              throw InvalidArgumentException::invalidType('"maxScan" option', $options['maxScan'], 'integer');
 229          }
 230  
 231          if (isset($options['maxTimeMS']) && ! is_integer($options['maxTimeMS'])) {
 232              throw InvalidArgumentException::invalidType('"maxTimeMS" option', $options['maxTimeMS'], 'integer');
 233          }
 234  
 235          if (isset($options['min']) && ! is_array($options['min']) && ! is_object($options['min'])) {
 236              throw InvalidArgumentException::invalidType('"min" option', $options['min'], 'array or object');
 237          }
 238  
 239          if (isset($options['modifiers']) && ! is_array($options['modifiers']) && ! is_object($options['modifiers'])) {
 240              throw InvalidArgumentException::invalidType('"modifiers" option', $options['modifiers'], 'array or object');
 241          }
 242  
 243          if (isset($options['noCursorTimeout']) && ! is_bool($options['noCursorTimeout'])) {
 244              throw InvalidArgumentException::invalidType('"noCursorTimeout" option', $options['noCursorTimeout'], 'boolean');
 245          }
 246  
 247          if (isset($options['oplogReplay']) && ! is_bool($options['oplogReplay'])) {
 248              throw InvalidArgumentException::invalidType('"oplogReplay" option', $options['oplogReplay'], 'boolean');
 249          }
 250  
 251          if (isset($options['projection']) && ! is_array($options['projection']) && ! is_object($options['projection'])) {
 252              throw InvalidArgumentException::invalidType('"projection" option', $options['projection'], 'array or object');
 253          }
 254  
 255          if (isset($options['readConcern']) && ! $options['readConcern'] instanceof ReadConcern) {
 256              throw InvalidArgumentException::invalidType('"readConcern" option', $options['readConcern'], ReadConcern::class);
 257          }
 258  
 259          if (isset($options['readPreference']) && ! $options['readPreference'] instanceof ReadPreference) {
 260              throw InvalidArgumentException::invalidType('"readPreference" option', $options['readPreference'], ReadPreference::class);
 261          }
 262  
 263          if (isset($options['returnKey']) && ! is_bool($options['returnKey'])) {
 264              throw InvalidArgumentException::invalidType('"returnKey" option', $options['returnKey'], 'boolean');
 265          }
 266  
 267          if (isset($options['session']) && ! $options['session'] instanceof Session) {
 268              throw InvalidArgumentException::invalidType('"session" option', $options['session'], Session::class);
 269          }
 270  
 271          if (isset($options['showRecordId']) && ! is_bool($options['showRecordId'])) {
 272              throw InvalidArgumentException::invalidType('"showRecordId" option', $options['showRecordId'], 'boolean');
 273          }
 274  
 275          if (isset($options['skip']) && ! is_integer($options['skip'])) {
 276              throw InvalidArgumentException::invalidType('"skip" option', $options['skip'], 'integer');
 277          }
 278  
 279          if (isset($options['snapshot']) && ! is_bool($options['snapshot'])) {
 280              throw InvalidArgumentException::invalidType('"snapshot" option', $options['snapshot'], 'boolean');
 281          }
 282  
 283          if (isset($options['sort']) && ! is_array($options['sort']) && ! is_object($options['sort'])) {
 284              throw InvalidArgumentException::invalidType('"sort" option', $options['sort'], 'array or object');
 285          }
 286  
 287          if (isset($options['typeMap']) && ! is_array($options['typeMap'])) {
 288              throw InvalidArgumentException::invalidType('"typeMap" option', $options['typeMap'], 'array');
 289          }
 290  
 291          if (isset($options['readConcern']) && $options['readConcern']->isDefault()) {
 292              unset($options['readConcern']);
 293          }
 294  
 295          if (isset($options['snapshot'])) {
 296              trigger_error('The "snapshot" option is deprecated and will be removed in a future release', E_USER_DEPRECATED);
 297          }
 298  
 299          if (isset($options['maxScan'])) {
 300              trigger_error('The "maxScan" option is deprecated and will be removed in a future release', E_USER_DEPRECATED);
 301          }
 302  
 303          $this->databaseName = (string) $databaseName;
 304          $this->collectionName = (string) $collectionName;
 305          $this->filter = $filter;
 306          $this->options = $options;
 307      }
 308  
 309      /**
 310       * Execute the operation.
 311       *
 312       * @see Executable::execute()
 313       * @param Server $server
 314       * @return Cursor
 315       * @throws UnsupportedException if collation or read concern is used and unsupported
 316       * @throws DriverRuntimeException for other driver errors (e.g. connection errors)
 317       */
 318      public function execute(Server $server)
 319      {
 320          if (isset($this->options['collation']) && ! server_supports_feature($server, self::$wireVersionForCollation)) {
 321              throw UnsupportedException::collationNotSupported();
 322          }
 323  
 324          if (isset($this->options['readConcern']) && ! server_supports_feature($server, self::$wireVersionForReadConcern)) {
 325              throw UnsupportedException::readConcernNotSupported();
 326          }
 327  
 328          if (isset($this->options['allowDiskUse']) && ! server_supports_feature($server, self::$wireVersionForAllowDiskUseServerSideError)) {
 329              throw UnsupportedException::allowDiskUseNotSupported();
 330          }
 331  
 332          $inTransaction = isset($this->options['session']) && $this->options['session']->isInTransaction();
 333          if ($inTransaction && isset($this->options['readConcern'])) {
 334              throw UnsupportedException::readConcernNotSupportedInTransaction();
 335          }
 336  
 337          $cursor = $server->executeQuery($this->databaseName . '.' . $this->collectionName, new Query($this->filter, $this->createQueryOptions()), $this->createExecuteOptions());
 338  
 339          if (isset($this->options['typeMap'])) {
 340              $cursor->setTypeMap($this->options['typeMap']);
 341          }
 342  
 343          return $cursor;
 344      }
 345  
 346      public function getCommandDocument(Server $server)
 347      {
 348          return $this->createCommandDocument();
 349      }
 350  
 351      /**
 352       * Construct a command document for Find
 353       */
 354      private function createCommandDocument()
 355      {
 356          $cmd = ['find' => $this->collectionName, 'filter' => (object) $this->filter];
 357  
 358          $options = $this->createQueryOptions();
 359  
 360          if (empty($options)) {
 361              return $cmd;
 362          }
 363  
 364          // maxAwaitTimeMS is a Query level option so should not be considered here
 365          unset($options['maxAwaitTimeMS']);
 366  
 367          $modifierFallback = [
 368              ['allowPartialResults', 'partial'],
 369              ['comment', '$comment'],
 370              ['hint', '$hint'],
 371              ['maxScan', '$maxScan'],
 372              ['max', '$max'],
 373              ['maxTimeMS', '$maxTimeMS'],
 374              ['min', '$min'],
 375              ['returnKey', '$returnKey'],
 376              ['showRecordId', '$showDiskLoc'],
 377              ['sort', '$orderby'],
 378              ['snapshot', '$snapshot'],
 379          ];
 380  
 381          foreach ($modifierFallback as $modifier) {
 382              if (! isset($options[$modifier[0]]) && isset($options['modifiers'][$modifier[1]])) {
 383                  $options[$modifier[0]] = $options['modifiers'][$modifier[1]];
 384              }
 385          }
 386          unset($options['modifiers']);
 387  
 388          return $cmd + $options;
 389      }
 390  
 391      /**
 392       * Create options for executing the command.
 393       *
 394       * @see http://php.net/manual/en/mongodb-driver-server.executequery.php
 395       * @return array
 396       */
 397      private function createExecuteOptions()
 398      {
 399          $options = [];
 400  
 401          if (isset($this->options['readPreference'])) {
 402              $options['readPreference'] = $this->options['readPreference'];
 403          }
 404  
 405          if (isset($this->options['session'])) {
 406              $options['session'] = $this->options['session'];
 407          }
 408  
 409          return $options;
 410      }
 411  
 412      /**
 413       * Create options for the find query.
 414       *
 415       * Note that these are separate from the options for executing the command,
 416       * which are created in createExecuteOptions().
 417       *
 418       * @return array
 419       */
 420      private function createQueryOptions()
 421      {
 422          $options = [];
 423  
 424          if (isset($this->options['cursorType'])) {
 425              if ($this->options['cursorType'] === self::TAILABLE) {
 426                  $options['tailable'] = true;
 427              }
 428              if ($this->options['cursorType'] === self::TAILABLE_AWAIT) {
 429                  $options['tailable'] = true;
 430                  $options['awaitData'] = true;
 431              }
 432          }
 433  
 434          foreach (['allowDiskUse', 'allowPartialResults', 'batchSize', 'comment', 'hint', 'limit', 'maxAwaitTimeMS', 'maxScan', 'maxTimeMS', 'noCursorTimeout', 'oplogReplay', 'projection', 'readConcern', 'returnKey', 'showRecordId', 'skip', 'snapshot', 'sort'] as $option) {
 435              if (isset($this->options[$option])) {
 436                  $options[$option] = $this->options[$option];
 437              }
 438          }
 439  
 440          foreach (['collation', 'max', 'min'] as $option) {
 441              if (isset($this->options[$option])) {
 442                  $options[$option] = (object) $this->options[$option];
 443              }
 444          }
 445  
 446          $modifiers = empty($this->options['modifiers']) ? [] : (array) $this->options['modifiers'];
 447  
 448          if (! empty($modifiers)) {
 449              $options['modifiers'] = $modifiers;
 450          }
 451  
 452          return $options;
 453      }
 454  }