general: ensure json columns are of jsonb type (#65265)

This commit is contained in:
Frédéric Péters 2022-05-15 11:32:27 +02:00
parent eaab3f8f58
commit b85d822d98
2 changed files with 65 additions and 0 deletions

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fargo/db_utils.py Normal file
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# fargo - document box
# Copyright (C) 2016-2022 Entr'ouvert
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from django.db import connection
from django.db.migrations.operations.base import Operation
class EnsureJsonbType(Operation):
reversible = True
def __init__(self, model_name, field_name):
self.model_name = model_name
self.field_name = field_name
def state_forwards(self, app_label, state):
pass
def database_forwards(self, app_label, schema_editor, from_state, to_state):
if connection.vendor == 'postgresql':
model = from_state.apps.get_model(app_label, self.model_name)
table_name = model._meta.db_table
field = model._meta.get_field(self.field_name)
_, column_name = field.get_attname_column()
with schema_editor.connection.cursor() as cursor:
cursor.execute(
'ALTER TABLE {table} ALTER COLUMN {col} TYPE jsonb USING {col}::jsonb;'.format(
table=table_name, col=column_name
)
)
def database_backwards(self, app_label, schema_editor, from_state, to_state):
pass
def describe(self):
return "Migrate to postgres jsonb type"

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# Generated by Django 2.2.28 on 2022-05-15 09:29
from django.db import migrations
from fargo.db_utils import EnsureJsonbType
class Migration(migrations.Migration):
dependencies = [
('fargo', '0002_auto_20210824_0957'),
]
operations = [
EnsureJsonbType(model_name='Validation', field_name='data'),
]