nb_inputs with select and input fields combined

[Hari0701]

Is there any way I can use both select and input.
operators
this.conditionList.forEach(value => {
this.operators.push({ type: value.name, optgroup: 'custom', nb_inputs: value.nbInputs + num, multiple: false, apply_to: ['number', 'string'] })
})
filters
this.filters.push({
id: value.fieldCode, label: value.fieldName, type: value.fieldType, validation: { allow_empty_value: false }, input: "select", values: {
0: [ "Fixed"],
1: ["Percentage"]
}
If I set this for everthing it is selectable but I want only the first field to be selectable. And for the other input fields I want to add a placeholder. Any suggestion would be a great help.

Thanks :)