mongoGridFS (Type of variable)

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Declaration
Properties specific to mongoGridFS variables
Functions that use the mongoGridFS type

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mongoGridFS (Type of variable)

In french: mongoGridFS

The mongoGridFS type is used to define the advanced characteristics of a file system for a MongoDB database. The characteristics of this file system can be defined and modified by several WLanguage properties.

Remark: For more details on the declaration of this type of variable and the use of WLanguage properties, see Declaring a variable.

Example

cntMDB is mongoConnection("mongodb://db1.example.net")
fs is mongoGridFS
fs.Database = cntMDB.Database["CRM"]
fs.Prefix = "myfs"
Trace(MongoGridFSListFile(fs))

Declaration

MyVariable is mongoGridFS(<Database>, <Prefix>)

<Database>: Character string

MongoDB database containing the file system.

<Prefix>: Character string

Prefix of collection.
Files will be stored in the collections as <prefix>.files and <prefix>.chunck.

Remarks

Properties specific to mongoGridFS variables

The following properties can be used to handle a MongoDB file system:

Property name	Type used	Effect

Database	mongoDatabase variable	Database containing the file system.
Prefix	Character string	Prefix of collection. Files will be stored in the collections as <prefix>.files and <prefix>.chunck.

Functions that use the mongoGridFS type

The following functions use the mongoGridFS type:


MongoGridFSDeleteFile	Deletes a file identified by its name from a MongoDB file system.
MongoGridFSDeleteFileByID	Deletes a file identified by its identifier from a MongoDB file system.
MongoGridFSGetFile	Retrieves (on the local computer) a file identified by its name and found in a MongoDB file system.
MongoGridFSGetFileByID	Retrieves (on the local computer) a file identified by its identifier and found in a MongoDB file system.
MongoGridFSGetFileInfo	Allows you to get information about a MongoDB file (gridFS).
MongoGridFSListFile	Retrieves the list of MongoDB files found in the MongoDB file system (gridFS).
MongoGridFSSendFile	Copies a file from the local computer to a MongoDB file system (gridFS).

Remark: These functions can also be used to handle a Mongo database. In this case, the prefix corresponds to the default value "fs".

Prefix syntaxes are also available:


<mongoGridFS variable>.DeleteFile	Deletes a file identified by its name from a MongoDB file system.
<mongoGridFS variable>.DeleteFileByID	Deletes a file identified by its identifier from a MongoDB file system.
<mongoGridFS variable>.GetFile	Retrieves (on the local computer) a file identified by its name and found in a MongoDB file system.
<mongoGridFS variable>.GetFileByID	Retrieves (on the local computer) a file identified by its identifier and found in a MongoDB file system.
<mongoGridFS variable>.GetFileInfo	Used to get information about a MongoDB file (gridFS).

Related Examples:

Unit examples (WINDEV): Native access to MongoDB

[ + ] This example shows how to use the main functions of native access to MongoDB databases: adding data, reading (searching), modifying and deleting data in the database. The example also shows functions for saving files in the MongoDB GridFS data system.