alembic: Fix errors during upgrade head.
[asterisk/asterisk.git] / contrib / ast-db-manage / config / versions / fe6592859b85_fix_mwi_subscribe_replaces_.py
1 """Fix mwi_subscribe_replaces_unsolicited
2
3 Revision ID: fe6592859b85
4 Revises: 19b00bc19b7b
5 Create Date: 2018-08-06 15:50:44.405534
6
7 """
8
9 # revision identifiers, used by Alembic.
10 revision = 'fe6592859b85'
11 down_revision = '1d3ed26d9978'
12
13 from alembic import op
14 import sqlalchemy as sa
15 from sqlalchemy.dialects.postgresql import ENUM
16
17 AST_BOOL_NAME = 'ast_bool_values'
18 # We'll just ignore the n/y and f/t abbreviations as Asterisk does not write
19 # those aliases.
20 AST_BOOL_VALUES = [ '0', '1',
21                     'off', 'on',
22                     'false', 'true',
23                     'no', 'yes' ]
24
25
26 def upgrade():
27     # Create the new enum
28     ast_bool_values = ENUM(*AST_BOOL_VALUES, name=AST_BOOL_NAME, create_type=False)
29     if op.get_context().bind.dialect.name == 'postgresql':
30         ast_bool_values.create(op.get_bind(), checkfirst=False)
31
32     # There is no direct way to convert from Integer to ENUM that is
33     # not database specific so we transition through a string type.
34     op.alter_column('ps_endpoints', 'mwi_subscribe_replaces_unsolicited',
35                     type_=sa.String(5))
36     op.alter_column('ps_endpoints', 'mwi_subscribe_replaces_unsolicited',
37             type_=ast_bool_values, postgresql_using='mwi_subscribe_replaces_unsolicited::{0}'.format(AST_BOOL_NAME))
38
39
40 def downgrade():
41     # First we need to ensure the column is using only the 'numeric' bool enum values.
42     op.execute("UPDATE ps_endpoints SET mwi_subscribe_replaces_unsolicited='0'"
43                " WHERE mwi_subscribe_replaces_unsolicited='off'"
44                "  OR mwi_subscribe_replaces_unsolicited='false'"
45                "  OR mwi_subscribe_replaces_unsolicited='no'")
46     op.execute("UPDATE ps_endpoints SET mwi_subscribe_replaces_unsolicited='1'"
47                " WHERE mwi_subscribe_replaces_unsolicited='on'"
48                "  OR mwi_subscribe_replaces_unsolicited='true'"
49                "  OR mwi_subscribe_replaces_unsolicited='yes'")
50
51     # There is no direct way to convert from ENUM to Integer that is
52     # not database specific so we transition through a string type.
53     if op.get_context().bind.dialect.name == 'mssql':
54         op.drop_constraint('ck_ps_endpoints_mwi_subscribe_replaces_unsolicited_ast_bool_values', 'ps_endpoints')
55     op.alter_column('ps_endpoints', 'mwi_subscribe_replaces_unsolicited',
56                     type_=sa.String(5))
57     op.alter_column('ps_endpoints', 'mwi_subscribe_replaces_unsolicited',
58             type_=sa.Integer, postgresql_using='mwi_subscribe_replaces_unsolicited::Integer')
59
60     if op.get_context().bind.dialect.name == 'postgresql':
61         ENUM(name=AST_BOOL_NAME).drop(op.get_bind(), checkfirst=False)