Attachment

Attachment stores uploaded file metadata for attachable records. In practice, this is commonly used for message attachments and group covers.

This model is tightly coupled to storage config, URL generation, and file cleanup.

Core fields:

Field	Purpose
`attachable_id`	Parent model id.
`attachable_type`	Parent model morph class.
`file_path`	Storage path on the configured disk.
`file_name`	Stored file name.
`original_name`	Original uploaded file name.
`mime_type`	Stored MIME type.
`url`	Computed URL accessor based on storage config.

Important Relationships

attachable(): MorphTo

Returns the model this attachment belongs to, usually a Message or Group.

$attachment->attachable

$attachment->url

Returns a public URL or a temporary private URL depending on the global Wirechat storage configuration.

$attachment->url

$attachment->size

Returns the file size in bytes when the file exists on disk.

$attachment->size

$attachment->formatted_size

Returns the file size in a human-readable format.

$attachment->formatted_size

$attachment->extension

Returns an extension-like value derived from the MIME type.

$attachment->extension

$attachment->clean_mime_type

Returns the MIME subtype, such as png, pdf, or zip.

$attachment->clean_mime_type

If you customize this model, preserve the filesystem cleanup behavior unless you are intentionally replacing it with your own storage lifecycle.