Интеграция базы данных Postgresql v2

backend/alembic/versions/initial_migration.py

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+"""Initial migration
+
+Revision ID: initial_migration
+Create Date: 2024-03-14 12:00:00.000000
+"""
+from alembic import op
+import sqlalchemy as sa
+from app.models.request import RequestStatus, RequestPriority
+
+# revision identifiers, used by Alembic.
+revision = 'initial_migration'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+def upgrade() -> None:
+    # Create employees table
+    op.create_table(
+        'employees',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('first_name', sa.String(), nullable=False),
+        sa.Column('last_name', sa.String(), nullable=False),
+        sa.Column('department', sa.String(), nullable=False),
+        sa.Column('office', sa.String(), nullable=False),
+        sa.Column('password', sa.String(), nullable=False),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('now()')),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_employees_id'), 'employees', ['id'], unique=False)
+    op.create_index(op.f('ix_employees_last_name'), 'employees', ['last_name'], unique=False)
+
+    # Create requests table
+    op.create_table(
+        'requests',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('employee_id', sa.Integer(), nullable=True),
+        sa.Column('department', sa.String(), nullable=False),
+        sa.Column('request_type', sa.String(), nullable=False),
+        sa.Column('priority', sa.Enum(RequestPriority), nullable=False),
+        sa.Column('status', sa.Enum(RequestStatus), nullable=False, server_default='new'),
+        sa.Column('description', sa.String(), nullable=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('now()')),
+        sa.ForeignKeyConstraint(['employee_id'], ['employees.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_requests_id'), 'requests', ['id'], unique=False)
+
+def downgrade() -> None:
+    op.drop_table('requests')
+    op.drop_table('employees')