Attachment

Attachment stores uploaded file metadata for attachable records, including 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()

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

$attachment->attachable

url

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

$attachment->url

size

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

$attachment->size

formatted_size

Returns the file size in a human-readable format.

$attachment->formatted_size

extension

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

$attachment->extension

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.