644fed244721_.py 文件源码

def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.alter_column('dataset', 'sequencing_method',
               existing_type=sa.String(length=50),
               type_=mysql.TEXT(charset=u'utf8', collation=u'utf8_bin'),
               existing_nullable=True)
    op.alter_column('dataset', 'library_strategy',
               existing_type=sa.String(length=50),
               type_=mysql.TEXT(charset=u'utf8', collation=u'utf8_bin'),
               existing_nullable=True)
    op.alter_column('dataset', 'library_source',
               existing_type=sa.String(length=50),
               type_=mysql.TEXT(),
               existing_nullable=True)
    op.alter_column('dataset', 'library_screening_strategy',
               existing_type=sa.String(length=80),
               type_=mysql.TEXT(charset=u'utf8', collation=u'utf8_bin'),
               existing_nullable=True)
    op.alter_column('dataset', 'library_construction_method',
               existing_type=sa.String(length=20),
               type_=mysql.TEXT(charset=u'utf8', collation=u'utf8_bin'),
               existing_nullable=True)
    op.alter_column('dataset', 'study_type',
               existing_type=sa.String(length=50),
               type_=mysql.TEXT(),
               existing_nullable=True)
    op.alter_column('dataset', 'investigation_type',
               existing_type=sa.String(length=80),
               type_=mysql.TEXT(),
               existing_nullable=True)
    op.alter_column('dataset', 'instrument_model',
               existing_type=sa.String(length=50),
               type_=mysql.TEXT(),
               existing_nullable=True)
    op.alter_column('dataset', 'geo_loc_name',
               existing_type=sa.String(length=100),
               type_=mysql.TEXT(),
               existing_nullable=True)
    op.alter_column('dataset', 'env_package',
               existing_type=sa.String(length=100),
               type_=mysql.TEXT(),
               existing_nullable=True)
    op.alter_column('dataset', 'env_material',
               existing_type=sa.String(length=150),
               type_=mysql.TEXT(),
               existing_nullable=True)
    op.alter_column('dataset', 'env_feature',
               existing_type=sa.String(length=200),
               type_=mysql.TEXT(),
               existing_nullable=True)
    op.alter_column('dataset', 'env_biome',
               existing_type=sa.String(length=100),
               type_=mysql.TEXT(),
               existing_nullable=True)
    # ### end Alembic commands ###