需要设置默认值

`
let formData = {};
this.formColumns.forEach(col => {
if (col.columnType === 'checkbox') {
formData[col.columnCode] = [];
} else {
formData[col.columnCode] = null;
}
});
console.log("🚀 ~ formData :", JSON.stringify(formData))
this.form = formData;