#Attachment

#Introduction

The system has a built-in "Attachment" field type to support file uploads in custom collections.

The Attachment field is fundamentally a Many-to-Many association field that points to the built-in "Attachments" (attachments) collection. When an Attachment field is created in any collection, a junction table for the many-to-many relationship is automatically generated. The metadata of uploaded files is stored in the "Attachments" collection, and the file information referenced in the collection is associated through this junction table.

#Field Configuration

#MIME Type Restrictions

Used to restrict the types of files allowed for upload, using the MIME syntax format. For example: image/* represents image files. Multiple types can be separated by a comma, for example: image/*,application/pdf allows both image and PDF file types.

#Storage Engine

Select the storage engine for storing uploaded files. If left blank, the system's default storage engine will be used.