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# -*- coding: utf-8 -*-
from odoo import models, fields, api, _
from odoo.exceptions import UserError
class IrModelFields(models.Model):
_inherit = 'ir.model.fields'
ttype = fields.Selection(selection_add=[('serialized', 'serialized')])
serialization_field_id = fields.Many2one('ir.model.fields', string='Serialization Field',
ondelete='cascade', domain="[('ttype','=','serialized')]",
help="If set, this field will be stored in the sparse structure of the "
"serialization field, instead of having its own database column. "
"This cannot be changed after creation.",
)
@api.multi
def write(self, vals):
# Limitation: renaming a sparse field or changing the storing system is
# currently not allowed
if 'serialization_field_id' in vals or 'name' in vals:
for field in self:
if 'serialization_field_id' in vals and field.serialization_field_id.id != vals['serialization_field_id']:
raise UserError(_('Changing the storing system for field "%s" is not allowed.') % field.name)
if field.serialization_field_id and (field.name != vals['name']):
raise UserError(_('Renaming sparse field "%s" is not allowed') % field.name)
return super(IrModelFields, self).write(vals)
def _reflect_field_params(self, field):
params = super(IrModelFields, self)._reflect_field_params(field)
params['serialization_field_id'] = None
if getattr(field, 'sparse', None):
model = self.env[field.model_name]
serialization_field = model._fields.get(field.sparse)
if serialization_field is None:
raise UserError(_("Serialization field `%s` not found for sparse field `%s`!") % (field.sparse, field.name))
serialization_record = self._reflect_field(serialization_field)
params['serialization_field_id'] = serialization_record.id
return params
def _instanciate_attrs(self, field_data):
attrs = super(IrModelFields, self)._instanciate_attrs(field_data)
if field_data.get('serialization_field_id'):
serialization_record = self.browse(field_data['serialization_field_id'])
attrs['sparse'] = serialization_record.name
return attrs
class TestSparse(models.TransientModel):
_name = 'sparse_fields.test'
data = fields.Serialized()
boolean = fields.Boolean(sparse='data')
integer = fields.Integer(sparse='data')
float = fields.Float(sparse='data')
char = fields.Char(sparse='data')
selection = fields.Selection([('one', 'One'), ('two', 'Two')], sparse='data')
partner = fields.Many2one('res.partner', sparse='data')
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