https://github.com/gotcha/collective.updatemimetype
Update Blob fields mime_type
https://github.com/gotcha/collective.updatemimetype
Last synced: 4 months ago
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Update Blob fields mime_type
- Host: GitHub
- URL: https://github.com/gotcha/collective.updatemimetype
- Owner: gotcha
- Created: 2015-06-29T10:23:07.000Z (almost 10 years ago)
- Default Branch: master
- Last Pushed: 2015-07-06T07:37:35.000Z (almost 10 years ago)
- Last Synced: 2025-01-19T17:13:26.242Z (5 months ago)
- Language: Python
- Size: 145 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
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Metadata Files:
- Readme: README.rst
- Changelog: CHANGES.rst
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README
=========================
collective.updatemimetype
=========================
This Plone add-on can be used to update broken mimetypes of Blob fields.
When a file or an image is uploaded to a Blob field, its mimetype is computed
based on information from the ``mimetypes_registry``.
If that registry misses some information, the computed mimetype can be wrong
or too general.
For instance, prior to version 2.0.7 of ``Products.MimetypeRegistry``,
the default ``mimetypes_registry`` of a Plone portal did not
know of OpenXML mimetypes. Those files would get ``application/zip``
mimetype instead of their proper mimetypes.
As computation of mimetype happens only at load time, upgrading
``Products.MimetypeRegistry`` is not enough to fix broken mimetypes.
The function ``collective.updatemimetype.migrate`` walks over content, looks
for blob fields that would get different mimetype if they would be uploaded again,
and updates those field mimetypes.
It can be called from a GenericSetup upgrade step with::
from collective.updatemimetype import migrate
migrate(portal)
.. CAUTION::
The update can demand a lot of memory and take a long time if your portal holds
a lot of content.
If you want to limit migration to specific content items, you can pass a ``query``
argument to the ``migrate`` function. For instance, while the code above updates both ``File``
and ``Image`` content items of a default Plone site, the code below would
only update ``File`` content items::
from collective.updatemimetype import migrate
catalog_query = {'portal_type': 'File'}
migrate(portal, catalog_query)
There is also a view registered on the portal. Call it with::
http://my_domain/my_portal/updatemimetype
The view can also be called with a ``query`` parameter. To limit update to
``File`` items, call the view with::
http://my_domain/my_portal/updatemimetype?query.portal_type:record:string=File