b83645976fdd_add_dtls_fingerprint_to_ps_endpoints.py

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"""add dtls_fingerprint to ps_endpoints
 
Revision ID: b83645976fdd
Revises: f3d1c5d38b56
Create Date: 2017-08-03 09:01:49.558111
 
"""
 
# revision identifiers, used by Alembic.
revision = 'b83645976fdd'
down_revision = 'f3d1c5d38b56'
 
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import ENUM
 
SHA_HASH_NAME = 'sha_hash_values'
SHA_HASH_VALUES = ['SHA-1', 'SHA-256']
 
def upgrade():
    context = op.get_context()
 
    if context.bind.dialect.name == 'postgresql':
        enum = ENUM(*SHA_HASH_VALUES, name=SHA_HASH_NAME)
        enum.create(op.get_bind(), checkfirst=False)
 
    op.add_column('ps_endpoints',
             sa.Column('dtls_fingerprint', ENUM(*SHA_HASH_VALUES,
                 name=SHA_HASH_NAME, create_type=False)))
 
def downgrade():
    context = op.get_context()
 
    if context.bind.dialect.name == 'mssql':
        op.drop_constraint('ck_ps_endpoints_dtls_fingerprint_sha_hash_values', 'ps_endpoints')
    op.drop_column('ps_endpoints', 'dtls_fingerprint')
 
    if context.bind.dialect.name == 'postgresql':
        enum = ENUM(*SHA_HASH_VALUES, name=SHA_HASH_NAME)
        enum.drop(op.get_bind(), checkfirst=False)