make migrations for GameRoomsUsers join table

migrations/versions/02be4c8fbd69_.py

@@ -0,0 +1,34 @@
+"""empty message
+
+Revision ID: 02be4c8fbd69
+Revises: 0e0f8ad1362d
+Create Date: 2019-10-09 10:05:32.403967
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '02be4c8fbd69'
+down_revision = '0e0f8ad1362d'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('game_rooms_users',
+    sa.Column('user_id', sa.Integer(), nullable=False),
+    sa.Column('game_rooms_id', sa.Integer(), nullable=False),
+    sa.ForeignKeyConstraint(['game_rooms_id'], ['game_rooms.id'], ),
+    sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
+    sa.PrimaryKeyConstraint('user_id', 'game_rooms_id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('game_rooms_users')
+    # ### end Alembic commands ###