69 lines
2.5 KiB
Python
69 lines
2.5 KiB
Python
"""add instances table
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Revision ID: add_instances_table
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Revises:
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Create Date: 2024-03-19 10:00:00.000000
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"""
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from alembic import op
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import sqlalchemy as sa
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from sqlalchemy import text
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# revision identifiers, used by Alembic.
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revision = 'add_instances_table'
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down_revision = None
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branch_labels = None
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depends_on = None
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def upgrade():
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conn = op.get_bind()
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result = conn.execute(text("""
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SELECT EXISTS (
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SELECT FROM information_schema.tables
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WHERE table_name = 'instances'
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);
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"""))
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exists = result.scalar()
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if not exists:
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op.create_table('instances',
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sa.Column('id', sa.Integer(), nullable=False),
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sa.Column('name', sa.String(length=255), nullable=False),
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sa.Column('company', sa.String(length=255), nullable=False),
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sa.Column('rooms_count', sa.Integer(), nullable=False, server_default='0'),
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sa.Column('conversations_count', sa.Integer(), nullable=False, server_default='0'),
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sa.Column('data_size', sa.String(length=50), nullable=False, server_default='0 MB'),
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sa.Column('payment_plan', sa.String(length=50), nullable=False, server_default='free'),
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sa.Column('main_url', sa.String(length=255), nullable=False),
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sa.Column('status', sa.String(length=20), nullable=False, server_default='inactive'),
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sa.Column('created_at', sa.DateTime(), nullable=False, server_default=sa.text('CURRENT_TIMESTAMP')),
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sa.Column('updated_at', sa.DateTime(), nullable=False, server_default=sa.text('CURRENT_TIMESTAMP')),
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sa.PrimaryKeyConstraint('id'),
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sa.UniqueConstraint('name'),
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sa.UniqueConstraint('main_url')
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)
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# Create a trigger to automatically update the updated_at column
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op.execute("""
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CREATE OR REPLACE FUNCTION update_updated_at_column()
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RETURNS TRIGGER AS $$
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BEGIN
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NEW.updated_at = CURRENT_TIMESTAMP;
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RETURN NEW;
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END;
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$$ language 'plpgsql';
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""")
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op.execute("""
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CREATE TRIGGER update_instances_updated_at
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BEFORE UPDATE ON instances
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FOR EACH ROW
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EXECUTE FUNCTION update_updated_at_column();
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""")
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def downgrade():
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op.execute("DROP TRIGGER IF EXISTS update_instances_updated_at ON instances")
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op.execute("DROP FUNCTION IF EXISTS update_updated_at_column()")
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op.drop_table('instances') |