📅  最后修改于: 2022-03-11 15:00:54.849000             🧑  作者: Mango
(# -- index is an array-- #)
{%- for col in index.columns %}
{%- if loop.first and not loop.last %}
{%- set ColumnString = ColumnString + col.name + "," -%}
{%- else -%}
{%- set ColumnString = ColumnString + col.name -%}
{% endif -%}
{%- endfor %}