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Field types for allowing file and image uploads to Amazon S3 (as well as default local storage) in Flask-Admin.

Project description

Field types for allowing file and image uploads to Amazon S3 (as well as default local storage) in Flask-Admin.

Usage

Use with a Flask-Admin ModelView by overriding field types, and by passing in special arguments to those fields:

from flask.ext.admin.contrib.sqla import ModelView

class MyView(ModelView):
    form_overrides = dict(
        some_image=S3ImageUploadField,
        some_file=S3FileUploadField)

    form_args = dict(
        some_image=dict(
            base_path='/some/folder/static',
            relative_path='some_image/',
            url_relative_path='uploads/',
            namegen=your_namegen_func_here,
            storage_type_field='some_image_storage_type',
            bucket_name_field='some_image_storage_bucket_name',
        ),
        some_file=dict(
            base_path='/some/folder/static',
            relative_path='some_file/',
            namegen=your_namegen_func_here,
            allowed_extensions=('pdf', 'txt'),
            storage_type_field='some_file_storage_type',
            bucket_name_field='some_file_storage_bucket_name',
        ))

    def scaffold_form(self):
        # Note: assuming that we have Flask-S3 config values to pass
        # to fields below. Flask-S3 is not required, you can pass
        # values from elsewhere if you want.
        from flask import current_app as app

        form_class = super(MyView, self).scaffold_form()
        static_root_parent = '/some/folder'

        if app.config['USE_S3']:
            form_class.some_image.kwargs['storage_type'] = 's3'
            form_class.some_file.kwargs['storage_type'] = 's3'

        form_class.some_image.kwargs['bucket_name'] = app.config['S3_BUCKET_NAME']
        form_class.some_image.kwargs['access_key_id'] = app.config['AWS_ACCESS_KEY_ID']
        form_class.some_image.kwargs['access_key_secret'] = app.config['AWS_SECRET_ACCESS_KEY']
        form_class.some_image.kwargs['static_root_parent'] = static_root_parent

        form_class.some_file.kwargs['bucket_name'] = app.config['S3_BUCKET_NAME']
        form_class.some_file.kwargs['access_key_id'] = app.config['AWS_ACCESS_KEY_ID']
        form_class.some_file.kwargs['access_key_secret'] = app.config['AWS_SECRET_ACCESS_KEY']
        form_class.some_file.kwargs['static_root_parent'] = static_root_parent

        return form_class

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