ir_attachment attachment system management attachment

odoo files are stored here

The storage path is

add_dir = os.path.join(self[‘data_dir’], ‘addons’)
中

Main structural parameters

Field	Types of	Description
res_id	integer	Owning record
res_model	char	Affiliation model
name	char	Attachment display name
datas_fname	char	accessory name
dates	binary	base64 encoded file
store_fname	char	Soft address for attachment storage
_filestore()	function	Returns the actual storage path of the attachment
type	selection	url/binary
url	char	url connection address
db_datas	binary	If it is not a storage database, storage entity
companyjd	Many2one	Default company
description	text	Introduction

Insert picture description here
The default xml location is'base'.'action_attachment'

<field name="name"/>
<field name="folder_id"/>
<field name="tag_ids" widget="many2many_tags"/>
<field name="datas" filename="datas_fname" attrs="{'invisible':[('type','=','url')]}"/>
<field name="datas_fname" invisible="1" attrs="{'invisible':[('type','=','url')]}" class="oe_inline oe_right"/>
<field name="owner_id"/>
<field name="partner_id"/>
<field name="file_size" attrs="{ 'invisible' : [('type', '!=', 'binary')]}"/>
<field name="type" readonly="1"/>
<field name="url" attrs="{ 'invisible' : [('type', '!=', 'url')]}"/>

Upload method

Use the uploaded binary data to upload to python. Then use python's ability to write to the file

datas = fields.Binary(string='File Content', compute='_compute_datas', inverse='_inverse_datas')
store_fname = fields.Char('Stored Filename')

    def _inverse_datas(self):
        for attach in self:
            # compute the fields that depend on datas
            value = attach.datas
            bin_data = base64.b64decode(value) if value else b''
            vals = {
                'file_size': len(bin_data),
                'checksum': self._compute_checksum(bin_data),
                'index_content': self._index(bin_data, attach.datas_fname, attach.mimetype),
                'store_fname': False,
                'db_datas': value,
            }
            # 写入二进制文件
            if value and location != 'db':
                # save it to the filestore
                vals['store_fname'] = self._file_write(value, vals['checksum'])
                vals['db_datas'] = False
			#......
	    # 获取所有路径
    @api.model
    def _full_path(self, path):
        # sanitize path
        path = re.sub('[.]', '', path)
        path = path.strip('/\\')
        return os.path.join(self._filestore(), path)

How to upload file name

filename: Used for binary fields, it is the model field name used to store the name of the uploaded file.

demo does not use field attributes to upload files

https://sxfblog.com/index.php/archives/421.html

In fact, the principle is found. You can use other methods
such as line_ids = one2many('ir.attachment')

and write ir.attachment to get the tree and form fields.

Since writing works. How to read? to be continued

odoo attachment system one