```ruby
# Be sure to restart your server when you modify this file.

# Add new mime types for use in respond_to blocks:
# Mime::Type.register "text/richtext", :rtf

Mime::Type.register "application/dxf", :dxf
Mime::Type.register "application/gml+xml", :gml
Mime::Type.register "application/msword", :doc
Mime::Type.register "application/msword", :dot
Mime::Type.register "application/rdf+xml", :rdf
Mime::Type.register "application/vnd.ms-excel", :xls
Mime::Type.register "application/vnd.ms-excel", :xlt
Mime::Type.register "application/vnd.ms-excel.sheet.macroEnabled.12", :xlsm
Mime::Type.register "application/vnd.ms-powerpoint", :ppt
Mime::Type.register "application/vnd.oasis.opendocument.spreadsheet", :ods
Mime::Type.register "application/vnd.oasis.opendocument.text", :odt
Mime::Type.register "application/vnd.openxmlformats-officedocument.presentationml.presentation", :pptx
Mime::Type.register "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", :xlsx
Mime::Type.register "application/vnd.openxmlformats-officedocument.wordprocessingml.document", :docx
Mime::Type.register "text/plain; charset=utf-8", :txt
Mime::Type.register "text/rtf", :rtf
```

Add correct mime type for .odp files
user
```ruby
# Be sure to restart your server when you modify this file.

# Add new mime types for use in respond_to blocks:
# Mime::Type.register "text/richtext", :rtf

Mime::Type.register "application/dxf", :dxf
Mime::Type.register "application/gml+xml", :gml
Mime::Type.register "application/msword", :doc
Mime::Type.register "application/msword", :dot
Mime::Type.register "application/rdf+xml", :rdf
Mime::Type.register "application/vnd.ms-excel", :xls
Mime::Type.register "application/vnd.ms-excel", :xlt
Mime::Type.register "application/vnd.ms-excel.sheet.macroEnabled.12", :xlsm
Mime::Type.register "application/vnd.ms-powerpoint", :ppt
Mime::Type.register "application/vnd.oasis.opendocument.spreadsheet", :ods
Mime::Type.register "application/vnd.oasis.opendocument.presentation", :odp
Mime::Type.register "application/vnd.oasis.opendocument.text", :odt
Mime::Type.register "application/vnd.openxmlformats-officedocument.presentationml.presentation", :pptx
Mime::Type.register "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", :xlsx
Mime::Type.register "application/vnd.openxmlformats-officedocument.wordprocessingml.document", :docx
Mime::Type.register "text/plain; charset=utf-8", :txt
Mime::Type.register "text/rtf", :rtf
```
assistant