"""add_water_sample_table

Revision ID: c4c4ef058b7d
Revises: 3c8a8862c800
Create Date: 2025-07-12 01:32:55.709345

"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = 'c4c4ef058b7d'
down_revision = '3c8a8862c800'
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('water_sampling_data',
    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False, comment='采样点ID'),
    sa.Column('sample_code', sa.String(length=20), nullable=True, comment='样品编码'),
    sa.Column('sample_number', sa.String(length=20), nullable=True, comment='样品编号'),
    sa.Column('longitude', sa.Float(), nullable=True, comment='经度坐标（精确到小数点后六位数）'),
    sa.Column('latitude', sa.Float(), nullable=True, comment='纬度坐标（精确到小数点后六位数）'),
    sa.Column('sampling_location', sa.String(length=100), nullable=True, comment='采样位置描述'),
    sa.Column('sample_time', sa.DateTime(), nullable=True, comment='采样时间'),
    sa.Column('weather', sa.String(length=50), nullable=True, comment='天气状况'),
    sa.Column('container_material', sa.String(length=50), nullable=True, comment='储存容器材质'),
    sa.Column('container_color', sa.String(length=50), nullable=True, comment='储存容器颜色'),
    sa.Column('container_capacity', sa.Integer(), nullable=True, comment='储存容器容量(mL)'),
    sa.Column('sampling_volume', sa.Float(), nullable=True, comment='采样体积(mL)'),
    sa.Column('sample_description', sa.Text(), nullable=True, comment='样品状态感官描述'),
    sa.Column('water_quality', sa.String(length=100), nullable=True, comment='断面水质表现'),
    sa.Column('water_environment', sa.String(length=100), nullable=True, comment='断面周边环境'),
    sa.Column('storage_method', sa.Text(), nullable=True, comment='保存方式'),
    sa.Column('cr_concentration', sa.Float(), nullable=True, comment='铬(Cr)含量(μg/L)'),
    sa.Column('as_concentration', sa.Float(), nullable=True, comment='砷(As)含量(μg/L)'),
    sa.Column('cd_concentration', sa.Float(), nullable=True, comment='镉(Cd)含量(μg/L)'),
    sa.Column('hg_concentration', sa.Float(), nullable=True, comment='汞(Hg)含量(μg/L)'),
    sa.Column('pb_concentration', sa.Float(), nullable=True, comment='铅(Pb)含量(μg/L)'),
    sa.Column('ph_value', sa.Float(), nullable=True, comment='水样pH值'),
    sa.PrimaryKeyConstraint('id')
    )
    # ### 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('water_sampling_data')
    # ### end Alembic commands ###