Write binary data into zip file and download it on button click in odoo

In this tutorial I am going to show you how to write binary field data into zip file and download it on Odoo button click event.

Download zip file on button click in Odoo

The scenario is we have an attachment or file (in binary format) in our database (PostgreSQL) and we want to download that file or attachment in .zip or .rar extension on button click. To do that I am going to use python library named "zipfile". This is python standard library, so we don't need to install it explicitly.

	@api.multi
	def odoo_button_click(self):
	print('****************odoo_button_click******************')
	import os, zipfile
	# function to convert binary data
	def isBase64_decodestring(s):
	try:
	return base64.decodestring(s)
	except Exception as e:
	raise ValidationError('Error:', +str(e))
	# getting working module where your current python file (model.py) exists
	path = os.path.dirname(os.path.realpath(__file__))
	# creating dynamic path to create zip file
	file_name = "static\\src\\any_folder\\" + str(self.field_1.name.strip().replace(' ', '_').replace('-', '_')) + '_' + str(self.name.strip().replace(' ', '_'))
	file_name_zip = file_name+".rar"
	zipfilepath = os.path.join(path, file_name_zip)
	# creating zip file in above mentioned path
	zip_archive = zipfile.ZipFile(zipfilepath, "w")
	# creating file name (like example.txt) in which we have to write binary field data or attachment
	object_name = self.binary_field_name
	object_handle = open(object_name, "w")
	# writing binary data into file handle
	object_handle.write(isBase64_decodestring(self.attachment))
	object_handle.close()
	# writing file into zip file
	zip_archive.write(object_name)
	zip_archive.close()
	# code snipet for downloading zip file
	return {
	'type': 'ir.actions.act_url',
	'url': str('/your_module/static/src/any_folder/'+str(zip_file_name_with_rar_extension),
	'target': 'new',
	}

view raw writing_binary_field_into_zipfile_in_odoo.py hosted with ❤ by GitHub

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