"""add_CropCd_output_table

Revision ID: 6fabcd91710d
Revises: 669ebfbec09b
Create Date: 2025-07-12 01:05:10.301182

"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = '6fabcd91710d'
down_revision = '669ebfbec09b'
branch_labels = None
depends_on = None


def upgrade():
    """升级数据库到当前版本"""
    # ### commands auto generated by Alembic - please adjust! ###
    op.create_table('CropCd_output_data',
    sa.Column('ID', sa.Integer(), autoincrement=True, nullable=False, comment='自增主键'),
    sa.Column('Farmland_ID', sa.Integer(), nullable=False, comment='关联农地ID'),
    sa.Column('Sample_ID', sa.Integer(), nullable=False, comment='关联样点ID'),
    sa.Column('LnCropCd', sa.Float(), nullable=False, comment='籽粒镉浓度的自然对数值[ln(mg/kg)]'),
    sa.ForeignKeyConstraint(['Farmland_ID', 'Sample_ID'], ['Farmland_data.Farmland_ID', 'Farmland_data.Sample_ID'], ),
    sa.PrimaryKeyConstraint('ID'),
    comment='作物镉预测模型输出数据'
    )
    # ### end Alembic commands ###


def downgrade():
    """将数据库降级到上一版本"""
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_table('CropCd_output_data')
    # ### end Alembic commands ###