Fs Image Thumbnail

This addon provides a convenient way to get and create if not exists image thumbnails. All the logic is implemented by the abstract model fs.image.thumbnail.mixin. The main method is get_or_create_thumbnails which accepts a FSImageValue instance, a list of thumbnail sizes and a base name.

When the method is called, it will check if the thumbnail exists for the given sizes and base name. If not, it will create it.

The fs.thumbnail model provided by this addon is a concrete implementation of the abstract model fs.image.thumbnail.mixin. The motivation to implement all the logic in an abstract model is to allow developers to create their own thumbnail models. This could be useful if you want to store the thumbnails in a different storage since you can specify the storage to use by model on the fs.storage form view.

Creating / retrieving thumbnails is as simple as:

from odoo.addons.fs_image.fields import FSImageValue

# create an attachment with a image file
attachment = self.env['ir.attachment'].create({
    'name': 'test',
    'datas': base64.b64encode(open('test.png', 'rb').read()),
    'datas_fname': 'test.png',
})

# create a FSImageValue instance for the attachment
image_value = FSImageValue(attachment)

# get or create the thumbnails
thumbnails = self.env['fs.thumbnail'].get_or_create_thumbnails(image_value, sizes=[(800,600), (400, 200)], base_name='my base name')

If you've a model with a FSImage field, the call to get_or_create_thumbnails is even simpler:

from odoo import models
from odoo.addons.fs_image.fields import FSImage

class MyModel(models.Model):
    _name = 'my.model'

    image = FSImage('Image')

my_record = cls.env['my.model'].create({
    'image': open('test.png', 'rb'),
})

# get or create the thumbnails
thumbnails = record.image.get_or_create_thumbnails(my_record.image,
    sizes=[(800,600), (400, 200)], base_name='my base name')