BootstrapValidator: How to use use two submit buttons and validate different fields on same form?

Question

So i have a form that has two submit buttons, but for each i want to validate different fields, in this case when i click on the preview submit button i want to ignore 3 fields, while in the 'normal' submit button i want to validate all. Is this possible?

Here's some html:

<form class="form" role="form" id="searchesForm">
  
   <input class="form-control" type="text" id="name" name="name"/>
   <input class="form-control" type="text" id="widgetWidth"  name="widgetWidth" /> 
   <input class="form-control" type="text" id="widgetHeight"  name="widgetHeight" />
   <!-- More fields validated for both button clicks-->
   ...
  
   <button type="button" id="preview" name="previewSearch" class="btn btn-default" >
     Preview
   </button>
   <button type="submit" id="submit" name="submitSave" class="btn btn-primary">
     Save
   </button>
</form>

So the idea is that when i press the preview button these 3 fields(name, widgetWidth and widgetHeight) should be ignored, but not when i press the save button.

Here's my bootstrap validator:

$('#searchesForm').bootstrapValidator({
                excluded: ['td>select,td>input,td>textarea'],
                feedbackIcons:{
                    valid: 'glyphicon glyphicon-ok',
                    invalid: 'glyphicon glyphicon-remove',
                    validating: 'glyphicon glyphicon-refresh'
                },
                live:'submitted',
                submitButtons:'[type="submit"]',
                fields: {
                    name: {
                        validators: {
                            notEmpty: {
                                enabled:function(){
                                    debugger;
                                    alert("testes");
                                },
                                message: 'The question required and cannot be empty'
                            }
                        }
                    }
                }
            }).on('success.form.bv',function(e){
                // Prevent form submission
                e.preventDefault();
                //check which button was pressed
                var button=$(e.target).data('bootstrapValidator').getSubmitButton();

                if($(button).attr("id")==="preview"){
                    
                    previewSearch();//do ajax stuff

                }else{
                    saveSearch();//do ajax stuff
                }

             
            }).on('error.form.bv',function(e){

                var invalidFields=$(e.target).data('bootstrapValidator').getInvalidFields();

                //show tab for specific fields location
                $.each(invalidFields,function(index,value){

                    if($("#filtros").has(value).length > 0){
                        $('#tabs li:eq(0) a').tab('show')
                    }
                    if($("#resultado").has(value).length > 0){
                        $('#tabs li:eq(1) a').tab('show')
                    }
                    if($("#widget").has(value).length > 0){
                        $('#tabs li:eq(2) a').tab('show')
                    }
                });
            }).on('status.field.bv', function (e, data) {

                if (data.bv.getSubmitButton()) {
                    data.bv.disableSubmitButtons(false);
                }

                if(data.bv.getSubmitButton()) {
                    if (data.bv.getSubmitButton().attr("id") === "preview"){
                        if (data.field === "name" || data.field === "widgetWidth" || data.field === "widgetHeight") {
                            
                            data.bv.$form.bootstrapValidator('enableFieldValidators', data.field, 'notEmpty', false);
                        }
                    }else{
                       
                        data.bv.$form.bootstrapValidator('enableFieldValidators', data.field, 'notEmpty', true);
                    }
                }
            });

I don't really know where can we enable/disable the field validator according to the button pressed. i tried to change the status of the fields validator on the .on('status.field.bv'...) method but it doesn't work completely. Also the submitButtons don't seem to work if i choose something other than "type=submit".

So has anyone come up with this situation?