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MongoGridFS::storeFile

(PECL mongo >=0.9.0)

MongoGridFS::storeFileStores a file in the database

说明

public mixed MongoGridFS::storeFile ( string|resource $filename [, array $metadata = array() [, array $options = array() ]] )

参数

filename

Name of the file or a readable stream to store.

metadata

Other metadata fields to include in the file document.

Note:

These fields may also overwrite those that would be created automatically by the driver, as described in the MongoDB core documentation for the » files collection. Some practical use cases for this behavior would be to specify a custom chunkSize or _id for the file.

options

An array of options for the insert operations executed against the chunks and files collections. See MongoCollection::insert() for documentation on these these options.

返回值

Returns the _id of the saved file document. This will be a generated MongoId unless an _id was explicitly specified in the extra parameter.

错误/异常

Throws MongoGridFSException if there is an error reading filename or inserting into the chunks or files collections.

范例

Example #1 MongoGridFS::storeFile() with additional metadata

<?php
$m 
= new  MongoClient ();
$gridfs  $m -> selectDB ( 'test' )-> getGridFS ();

$id  $gridfs -> storeFile ( 'example.txt' , array( 'contentType'  =>  'plain/text' ));
$gridfsFile  $gridfs -> get ( $id );

var_dump ( $gridfsFile -> file );
?>

以上例程的输出类似于:

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array(7) {

  ["_id"]=>

  object(MongoId)#6 (0) {

  }

  ["contentType"]=>

  string(10) "plain/text"

  ["filename"]=>

  string(11) "example.txt"

  ["uploadDate"]=>

  object(MongoDate)#7 (0) {

  }

  ["length"]=>

  int(26)

  ["chunkSize"]=>

  int(262144)

  ["md5"]=>

  string(32) "c3fcd3d76192e4007dfb496cca67e13b"

}

参见

  • MongoGridFS::put() - Stores a file in the database
  • MongoGridFS::storeBytes() - Stores a string of bytes in the database
  • MongoGridFS::storeUpload() - Stores an uploaded file in the database
  • MongoDB core docs on » GridFS

用户评论:

[#1] mike at eastghost dot com [2012-02-16 13:50:27]

Pass 

$options['safe'] = true;

to make Mongo slow down and do inserts sequentially instead of in parallel.

Use case:

I had 274 PDF documents stored on ext3 disk (avg. size was 5MB, none over 20MB)

A PHP loop loaded each PDF, then did a $GridFS->storeFile( $data, $meta );

This caused server to spike from load average of 0.2 to over 20.0

Apparently what was happening is the loop slammed Mongo (then memory, disk) with 274 convert/stores to do all at once.

Adding

$GridFS->storeFile( $data, $meta, array( 'safe' => true ) );

made the loop slow down and wait for each insert to finish and be confirmed before going on to next PDF.

Moral: Safe option can be used to maintain sanity and is not always just for data validity.