angular 5, Keeping value on inputs and adding it to JS object - input

Question

I am making a web tool in angular 5 to help in the creation of new XML.
I am having trouble passing around the values of inputs and keeping them in the same input at the same time.
I Have a form with an event of ngSubmit that uses as a paremeter the reference of an ngForm
<form class="form-group" (ngSubmit)="createSimpleTypeList(f)" #f="ngForm" >
<div class="container">
<div class="row">
<div class="col-sm-12" >
<button class="btn btn-danger flex ">Construir Json!</button>
</div>
</div>
</div>
<hr>
<div class="container" *ngFor="let type of objSimpleType;let i =index">
<hr>
<div class="row">
<div class="col-sm-3">
<input type="text" [(ngModel)]="type.name" name="nameType"/>
<br>
Inserte el nombre del tipo:
</div>
<div class="col-sm-3">
<input type="text" [(ngModel)]="type.type" name="type"/>
<br>
Inserte el tipo:
</div>
<div class="col-sm-2">
<input type="number" [(ngModel)]="type.min" name="min"/>
<br>
Inserte minimo:
</div>
<div class="col-sm-2">
<input type="number" [(ngModel)]="type.max" name="max"/>
<br>
Inserte maximo:
</div>
<div class="col-sm-2">
<input type="checkbox" name="number" /> Numero?
</div>
</div>
</div>
<hr>
</form>
This is the createSimpleTypeList method
console.log(form.value.nameType);
this.objSimpleType.push({
'-name': form.value.nameType,
'xsd:restriction': {
'-base': form.value.type,
'xsd:minLength': {
'-value': form.value.min
},
'xsd:maxLenght': {
'-value': form.value.max
}
}
});
this.typeList.emit(form.value.nameType);
this.sharedNameSpace.emit(this.namespace);
The problem I am having is that I have not found a way to push new items into objSimpleType, without erasing the value of inputs, and if I manage to not erase the value of the inputs then the values of the form wont push.
this is how it looks.how the inputs work right now
This is what I need
How the inputs should be
I am still new to angular, and I would really appreciate the help.

Answer 1

Now that I have looked found the solution, I had two mistakes in the code above.
First my logic was not well executed, I needed to work with unique IDs,and call them dynamically.
Second, I was having trouble to call them , and after reading a lot, I found that I can call the parameters of a Json with brackets[].
"form.value['nameType' + this.i]" --Something like this is what i Needed.