fe6592859b85_fix_mwi_subscribe_replaces_.py

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"""Fix mwi_subscribe_replaces_unsolicited

Revision ID: fe6592859b85
Revises: 19b00bc19b7b
Create Date: 2018-08-06 15:50:44.405534

"""

# revision identifiers, used by Alembic.
revision = 'fe6592859b85'
down_revision = '1d3ed26d9978'

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import ENUM

AST_BOOL_NAME = 'ast_bool_values'
# We'll just ignore the n/y and f/t abbreviations as Asterisk does not write
# those aliases.
AST_BOOL_VALUES = [ '0', '1',
 'off', 'on',
 'false', 'true',
 'no', 'yes' ]


def upgrade():
 # Create the new enum
 ast_bool_values = ENUM(*AST_BOOL_VALUES, name=AST_BOOL_NAME, create_type=False)
 if op.get_context().bind.dialect.name == 'postgresql':
 ast_bool_values.create(op.get_bind(), checkfirst=False)

 # There is no direct way to convert from Integer to ENUM that is
 # not database specific so we transition through a string type.
 op.alter_column('ps_endpoints', 'mwi_subscribe_replaces_unsolicited',
 type_=sa.String(5))
 op.alter_column('ps_endpoints', 'mwi_subscribe_replaces_unsolicited',
 type_=ast_bool_values, postgresql_using='mwi_subscribe_replaces_unsolicited::{0}'.format(AST_BOOL_NAME))


def downgrade():
 # First we need to ensure the column is using only the 'numeric' bool enum values.
 op.execute("UPDATE ps_endpoints SET mwi_subscribe_replaces_unsolicited='0'"
 " WHERE mwi_subscribe_replaces_unsolicited='off'"
 " OR mwi_subscribe_replaces_unsolicited='false'"
 " OR mwi_subscribe_replaces_unsolicited='no'")
 op.execute("UPDATE ps_endpoints SET mwi_subscribe_replaces_unsolicited='1'"
 " WHERE mwi_subscribe_replaces_unsolicited='on'"
 " OR mwi_subscribe_replaces_unsolicited='true'"
 " OR mwi_subscribe_replaces_unsolicited='yes'")

 # There is no direct way to convert from ENUM to Integer that is
 # not database specific so we transition through a string type.
 if op.get_context().bind.dialect.name == 'mssql':
 op.drop_constraint('ck_ps_endpoints_mwi_subscribe_replaces_unsolicited_ast_bool_values', 'ps_endpoints')
 op.alter_column('ps_endpoints', 'mwi_subscribe_replaces_unsolicited',
 type_=sa.String(5))
 op.alter_column('ps_endpoints', 'mwi_subscribe_replaces_unsolicited',
 type_=sa.Integer, postgresql_using='mwi_subscribe_replaces_unsolicited::Integer')

 if op.get_context().bind.dialect.name == 'postgresql':
 ENUM(name=AST_BOOL_NAME).drop(op.get_bind(), checkfirst=False)