73 lines
2.4 KiB
Python
73 lines
2.4 KiB
Python
"""Add conversations and messages tables
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Revision ID: add_conversations_tables
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Revises: 2c5f57dddb78
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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 inspect
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# revision identifiers, used by Alembic.
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revision = 'add_conversations_tables'
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down_revision = '2c5f57dddb78'
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branch_labels = None
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depends_on = None
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def upgrade():
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# Create conversation table first
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conn = op.get_bind()
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inspector = inspect(conn)
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tables = inspector.get_table_names()
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if 'conversation' not in tables:
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op.create_table('conversation',
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sa.Column('id', sa.Integer(), nullable=False),
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sa.Column('name', sa.String(length=100), nullable=False),
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sa.Column('description', sa.Text(), nullable=True),
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sa.Column('created_at', sa.DateTime(), nullable=True),
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sa.Column('created_by', sa.Integer(), nullable=False),
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sa.ForeignKeyConstraint(['created_by'], ['user.id'], ),
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sa.PrimaryKeyConstraint('id')
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)
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# Create conversation_members table
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conn = op.get_bind()
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inspector = inspect(conn)
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tables = inspector.get_table_names()
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if 'conversation_members' not in tables:
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op.create_table('conversation_members',
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sa.Column('conversation_id', sa.Integer(), nullable=False),
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sa.Column('user_id', sa.Integer(), nullable=False),
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sa.ForeignKeyConstraint(['conversation_id'], ['conversation.id'], ),
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sa.ForeignKeyConstraint(['user_id'], ['user.id'], ),
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sa.PrimaryKeyConstraint('conversation_id', 'user_id')
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)
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# Create message table
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conn = op.get_bind()
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inspector = inspect(conn)
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tables = inspector.get_table_names()
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if 'message' not in tables:
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op.create_table('message',
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sa.Column('id', sa.Integer(), nullable=False),
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sa.Column('content', sa.Text(), nullable=False),
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sa.Column('created_at', sa.DateTime(), nullable=True),
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sa.Column('conversation_id', sa.Integer(), nullable=False),
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sa.Column('user_id', sa.Integer(), nullable=False),
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sa.ForeignKeyConstraint(['conversation_id'], ['conversation.id'], ),
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sa.ForeignKeyConstraint(['user_id'], ['user.id'], ),
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sa.PrimaryKeyConstraint('id')
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)
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def downgrade():
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# Drop tables in reverse order
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op.drop_table('message')
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op.drop_table('conversation_members')
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op.drop_table('conversation') |