What is the best known option to dynamically add model fields in nested form?

最知名的选项来动态地添加嵌套表模型的领域是什么？

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At least one column must be a key in each mining model and nested table.

在每个挖掘模型和嵌套表中，必须至少有一列是键。

youdao

At least one column must be a key in each mining model and nested table.

在每个挖掘模型和嵌套表中，必须至少有一列是键。

youdao